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미해결
자바(Java) 알고리즘 문제풀이 입문: 코딩테스트 대비

Chapter 7 문제가 8번만 있습니다.

Chapter 7 1번부터 7번까지 문제가 문제 푸는 사이트에 없습니다..

jhjikhsdsdw · 2021.07.31 · 자바(Java) 알고리즘 문제풀이 입문: 코딩테스트 대비

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윤재성의 스프링 프레임워크 개발자를 위한 실습을 통한 입문 과정

beans.xml 설정시

안녕하세요 xml설정시 org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException : 에러가 나서 해결하던중 <beans xmlns="http://www.springframwork.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> </beans> 를 <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"> </beans> 와 같이 spring-beans-3.0.xsd 설정해주니 에러가 안나는 이유가 궁금합니다. 처음에는 오타문제인줄 알았으나 오타는 없었습니다.

alclsloo · 2021.07.31 · 윤재성의 스프링 프레임워크 개발자를 위한 실습을 통한 입문 과정

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[C#과 유니티로 만드는 MMORPG 게임 개발 시리즈] Part9: MMO 컨텐츠 구현 (DB연동 + 대형 구조 + 라이브 준비)

UI가 아닌 캐릭터를 클릭하고 싶은 경우

안녕하세요 ~! (예를들어 디아블로의 포탈 같은걸 만들기 위해) 맵에 있는 지형지물을 UI_Base를 상속하게 만들었는데 서버 선택창과 유사하게 클릭이벤트까지 BInd를 다 했는데도 불구하고 마우스 클릭을 인식하지 못합니다. ㅜㅜ 해당 지형지물에 Collider를 추가해야하는지, 혹은 다른 방법이 있는지 궁금합니다!

sounds good · 2021.07.31 · [C#과 유니티로 만드는 MMORPG 게임 개발 시리즈] Part9: MMO 컨텐츠 구현 (DB연동 + 대형 구조 + 라이브 준비)

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따라하며 배우는 노드, 리액트 시리즈 - 유튜브 사이트 만들기

이 오류는 뭔가요?? 잘 작동은 하는데 오류가 나네요

Warning: Received `true` for a non-boolean attribute `href`. If you want to write it to the DOM, pass a string instead: href="true" or href={value.toString()}. in a (at SideVideo.js:27) in div (at SideVideo.js:26) in div (at SideVideo.js:25) in SideVideo (at VideoDetailPage.js:45) in div (created by Context.Consumer) in Col (at VideoDetailPage.js:44) in div (created by Context.Consumer) in Row (at VideoDetailPage.js:29) in VideoDetailPage (at auth.js:38) in AuthenticationCheck (created by Context.Consumer) in Route (at App.js:27) in Switch (at App.js:22) in div (at App.js:21) in Suspense (at App.js:19) in App (at src/index.js:29) in Router (created by BrowserRouter) in BrowserRouter (at src/index.js:28) in Provider (at src/index.js:21) 이 오류는 어떻게 없애나요???

이명선 · 2021.07.31 · 따라하며 배우는 노드, 리액트 시리즈 - 유튜브 사이트 만들기

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프로젝트로 배우는 Vue.js 3

vue 3에서 ::v-deep 적용방법 질문드립니다.

선생님~ 강의 내용과 관련이 없는 내용인데, 질문드려봅니다. vue 2에서는 ::v-deep 이 아래처럼 하면 적용되었는데... vue 3에서는 작동되지 않습니다. 적용하는 방법이 있을까요? <style lang="scss" scoped> ::v-deep { @import '~@/assets/scss/components/default.scss'; } </style>

소나무 · 2021.07.31 · 프로젝트로 배우는 Vue.js 3

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웹 게임을 만들며 배우는 React

스프레드 연산자 질문 있습니다

for(let i=0; i<winNumbers.length-1;i++){ timeouts.current[i]=setTimeout(()=>{ console.log(winBalls) setWinBalls([...winBalls,winNumbers[i]]) },(i+1)*1000) } useEffect 안에 코드를 이렇게 넣고 짰습니다. 여기서 winNumbers가 [ 8, 16, 29, 36, 39, 41 ]라고 하면 winBalls라는 배열 안에 이전 winBalls를 복사한 후 winNumbers의 숫자를 한개씩 넣는걸로 이해했어요. setWinBalls로 winBalls를 바꿔주니까 굳이 prevBalls를 넣지 않아도 된다고 생각했거든요. winBalls배열은 바깥에 선언되어있고 for문을 돌면서 이전 배열을 복사해서 넣는거니까 winBalls가 [ 8 ] [ 8, 16 ] [ 8, 16, 29 ] [ 8, 16, 29, 36 ] [ 8, 16, 29, 36, 39 ] [ 8, 16, 29, 36, 39, 41 ] 이렇게 출력이 될거라고 예상했는데 계속 []만 출력되더라구요 이유를 잘 모르겠어서 질문드립니다!

hyojin hyo · 2021.07.31 · 웹 게임을 만들며 배우는 React

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mongoDB 기초부터 실무까지(feat. Node.js)

몽고디비와 mysql을 연결할 수 있을까요?

운동관련 서비스를 만들면서 사용자가 작성한 운동종목만 따로 가져와서 포스팅하려고 하는데 이를 위해서 mysql과 몽고디비를 연결해서 사용하고자 합니다. mysql에서 사용자가 작성한 운동종목 데이터만 몽고디비로 가져올 수 있을까요? sequelize와 mongoose를 사용하여, 또는 두 개의 디비를 connection하는 방법이 궁금합니다.

젊음의돌 · 2021.07.31 · mongoDB 기초부터 실무까지(feat. Node.js)

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미해결
[리뉴얼] React로 NodeBird SNS 만들기

포트폴리오 질문

선생님 혹시 인스타그램이나 타사이트 클론코딩 한것도 회사나 프리랜서하면서 포트폴리오로 제출할수있나요?

노른자 · 2021.07.31 · [리뉴얼] React로 NodeBird SNS 만들기

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[개정판] 파이썬 머신러닝 완벽 가이드

선생님, 질문이 있습니다.

선생님, 강의 잘 듣고 있습니다.. 대학원 가기 전에 다시 복습할 겸 듣고 있는데 매번 코딩을 새로 배우거나 하면 드는 생각이 '늘 메서드를 굳이 전부 외울 필요는 없지만 익숙해질 필요는 있다' 인데요.. 사실 저는 코딩테스트도 c++로만 봤어서 Pythonic한 문법은 익숙하지 않은데(특히 Python이 type dynamic해서 형에 대해 제약이 없다는 점이 오히려 낯설게 다가온다거나 List comprehension 등) 그래서인지 이런 메서드 정렬 / 삽입 등등 메서드의 이름을 기억하고 API로 내면화하고 자유롭게 쓰는게 오히려 어렵더라구요 가령 titanic_df[['Name','Age','Pclass']].sort_values(by=['Pclass','Age']) 이런 것에서도 sort_values(by=['Pclass','Age']) shift tap tap을 눌러보면 by에는 list형만 올 수 있다고 적혀있고 또 그렇게 써야만 하는걸로 이해하면 되는데 저걸 이해하기 전까지는 by = [['Pclass','Age]] 도 되는거 아님? 2차원 df에 대한 정렬이니 그에 대한 기준도 2차원 df로 맞춰줘야 하는거 아닌가?라는 식으로 의문을 갖다보면 헷갈리게 됩니다. 만약 이걸 실전에서 현업에 쓴다고 했을 때 확실히 sort_values라는 명칭과 매개변수까지 전부 숙지한 사람과 그렇지 못하고 구글링으로 pandas dataframe sort module 검색한 다음 용법을 확인하고 써먹는 사람과는 일의 능률에 차이가 분명히 있고 무시할 수도 없는 차이라 걱정이 되네요. 이런 저같은 경우에는 그냥 계속 이쪽 계열의 코딩을 많이 해보면서 익숙해지는 방법밖에 없을까요? 아니면 다른 좋은 고견이 있을까요? 감사합니다.

celestial_ · 2021.07.31 · [개정판] 파이썬 머신러닝 완벽 가이드

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해결됨
스프링 입문 - 코드로 배우는 스프링 부트, 웹 MVC, DB 접근 기술

Whitelabel Error Page 에러

h2 데이터베이스에는 값이 제대로 들어가 있는데 회원 목록에 들어가면 오류가 뜨네요.. 그래서 회원 가입에서 등록한 값은 값이 제대로 들어오는 지 확인하려 하니 등록 버튼을 누르면 똑같이 Whitelabel Error Page 가 뜹니다.. 재부팅, db 삭제 후 재생성, 8080 포트 삭제 후 재시작, gradle 리프레쉬, 질문 확인, 코드 재확인 등 여러가지 시도해봤지만 해결이 되지 않아 질문드립니다ㅠㅠㅠ <오류 코드> org.h2.jdbc.JdbcSQLNonTransientConnectionException: Database may be already in use: null. Possible solutions: close all other connection(s); use the server mode [90020-200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:622) ~[h2-1.4.200.jar:1.4.200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:429) ~[h2-1.4.200.jar:1.4.200] at org.h2.message.DbException.get(DbException.java:194) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.convertIllegalStateException(MVTableEngine.java:206) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.open(MVTableEngine.java:182) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine.init(MVTableEngine.java:103) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.getPageStore(Database.java:2659) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.open(Database.java:675) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.openDatabase(Database.java:307) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.<init>(Database.java:301) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:74) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:192) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSessionAndValidate(Engine.java:171) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:166) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:29) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:340) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:173) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:152) ~[h2-1.4.200.jar:1.4.200] at org.h2.Driver.connect(Driver.java:69) ~[h2-1.4.200.jar:1.4.200] at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:364) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:476) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:561) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-4.0.3.jar:na] at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:158) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:116) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79) ~[spring-jdbc-5.3.8.jar:5.3.8] at spring.springintroduction.repository.JdbcMemberRepository.getConnection(JdbcMemberRepository.java:138) ~[classes/:na] at spring.springintroduction.repository.JdbcMemberRepository.findByName(JdbcMemberRepository.java:117) ~[classes/:na] at spring.springintroduction.service.MemberService.validateDuplicateMember(MemberService.java:30) ~[classes/:na] at spring.springintroduction.service.MemberService.join(MemberService.java:23) ~[classes/:na] at spring.springintroduction.controller.MemberController.create(MemberController.java:33) ~[classes/:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1063) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:681) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:228) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1723) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na] Caused by: java.lang.IllegalStateException: The file is locked: nio:C:/Users/hikar/Documents/H2/Spring-introduction.mv.db [1.4.200/7] at org.h2.mvstore.DataUtils.newIllegalStateException(DataUtils.java:950) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.FileStore.open(FileStore.java:172) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore.<init>(MVStore.java:381) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore$Builder.open(MVStore.java:3579) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.open(MVTableEngine.java:170) ~[h2-1.4.200.jar:1.4.200] ... 79 common frames omitted 2021-07-31 15:19:52.530 ERROR 8400 --- [nio-8080-exec-6] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.IllegalStateException: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is org.h2.jdbc.JdbcSQLNonTransientConnectionException: Database may be already in use: null. Possible solutions: close all other connection(s); use the server mode [90020-200]] with root cause java.lang.IllegalStateException: The file is locked: nio:C:/Users/hikar/Documents/H2/Spring-introduction.mv.db [1.4.200/7] at org.h2.mvstore.DataUtils.newIllegalStateException(DataUtils.java:950) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.FileStore.open(FileStore.java:172) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore.<init>(MVStore.java:381) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore$Builder.open(MVStore.java:3579) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.open(MVTableEngine.java:170) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine.init(MVTableEngine.java:103) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.getPageStore(Database.java:2659) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.open(Database.java:675) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.openDatabase(Database.java:307) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.<init>(Database.java:301) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:74) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:192) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSessionAndValidate(Engine.java:171) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:166) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:29) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:340) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:173) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:152) ~[h2-1.4.200.jar:1.4.200] at org.h2.Driver.connect(Driver.java:69) ~[h2-1.4.200.jar:1.4.200] at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:364) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:476) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:561) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-4.0.3.jar:na] at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:158) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:116) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79) ~[spring-jdbc-5.3.8.jar:5.3.8] at spring.springintroduction.repository.JdbcMemberRepository.getConnection(JdbcMemberRepository.java:138) ~[classes/:na] at spring.springintroduction.repository.JdbcMemberRepository.findByName(JdbcMemberRepository.java:117) ~[classes/:na] at spring.springintroduction.service.MemberService.validateDuplicateMember(MemberService.java:30) ~[classes/:na] at spring.springintroduction.service.MemberService.join(MemberService.java:23) ~[classes/:na] at spring.springintroduction.controller.MemberController.create(MemberController.java:33) ~[classes/:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1063) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:681) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:228) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1723) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na] 2021-07-31 15:24:32.787 INFO 8400 --- [nio-8080-exec-4] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting... 2021-07-31 15:24:33.820 ERROR 8400 --- [nio-8080-exec-4] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Exception during pool initialization. org.h2.jdbc.JdbcSQLNonTransientConnectionException: Database may be already in use: null. Possible solutions: close all other connection(s); use the server mode [90020-200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:622) ~[h2-1.4.200.jar:1.4.200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:429) ~[h2-1.4.200.jar:1.4.200] at org.h2.message.DbException.get(DbException.java:194) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.convertIllegalStateException(MVTableEngine.java:206) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.open(MVTableEngine.java:182) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine.init(MVTableEngine.java:103) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.getPageStore(Database.java:2659) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.open(Database.java:675) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.openDatabase(Database.java:307) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.<init>(Database.java:301) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:74) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:192) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSessionAndValidate(Engine.java:171) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:166) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:29) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:340) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:173) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:152) ~[h2-1.4.200.jar:1.4.200] at org.h2.Driver.connect(Driver.java:69) ~[h2-1.4.200.jar:1.4.200] at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:364) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:476) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:561) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-4.0.3.jar:na] at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:158) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:116) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79) ~[spring-jdbc-5.3.8.jar:5.3.8] at spring.springintroduction.repository.JdbcMemberRepository.getConnection(JdbcMemberRepository.java:138) ~[classes/:na] at spring.springintroduction.repository.JdbcMemberRepository.findAll(JdbcMemberRepository.java:90) ~[classes/:na] at spring.springintroduction.service.MemberService.findMembers(MemberService.java:37) ~[classes/:na] at spring.springintroduction.controller.MemberController.list(MemberController.java:40) ~[classes/:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1063) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:228) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1723) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na] Caused by: java.lang.IllegalStateException: The file is locked: nio:C:/Users/hikar/Documents/H2/Spring-introduction.mv.db [1.4.200/7] at org.h2.mvstore.DataUtils.newIllegalStateException(DataUtils.java:950) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.FileStore.open(FileStore.java:172) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore.<init>(MVStore.java:381) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore$Builder.open(MVStore.java:3579) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.open(MVTableEngine.java:170) ~[h2-1.4.200.jar:1.4.200] ... 78 common frames omitted 2021-07-31 15:24:33.823 ERROR 8400 --- [nio-8080-exec-4] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.IllegalStateException: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is org.h2.jdbc.JdbcSQLNonTransientConnectionException: Database may be already in use: null. Possible solutions: close all other connection(s); use the server mode [90020-200]] with root cause java.lang.IllegalStateException: The file is locked: nio:C:/Users/hikar/Documents/H2/Spring-introduction.mv.db [1.4.200/7] at org.h2.mvstore.DataUtils.newIllegalStateException(DataUtils.java:950) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.FileStore.open(FileStore.java:172) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore.<init>(MVStore.java:381) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore$Builder.open(MVStore.java:3579) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.open(MVTableEngine.java:170) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine.init(MVTableEngine.java:103) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.getPageStore(Database.java:2659) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.open(Database.java:675) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.openDatabase(Database.java:307) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.<init>(Database.java:301) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:74) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:192) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSessionAndValidate(Engine.java:171) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:166) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:29) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:340) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:173) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:152) ~[h2-1.4.200.jar:1.4.200] at org.h2.Driver.connect(Driver.java:69) ~[h2-1.4.200.jar:1.4.200] at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:364) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:476) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:561) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-4.0.3.jar:na] at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:158) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:116) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79) ~[spring-jdbc-5.3.8.jar:5.3.8] at spring.springintroduction.repository.JdbcMemberRepository.getConnection(JdbcMemberRepository.java:138) ~[classes/:na] at spring.springintroduction.repository.JdbcMemberRepository.findAll(JdbcMemberRepository.java:90) ~[classes/:na] at spring.springintroduction.service.MemberService.findMembers(MemberService.java:37) ~[classes/:na] at spring.springintroduction.controller.MemberController.list(MemberController.java:40) ~[classes/:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1063) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:228) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1723) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na] 2021-07-31 15:33:27.987 INFO 8400 --- [nio-8080-exec-8] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting... 2021-07-31 15:33:29.015 ERROR 8400 --- [nio-8080-exec-8] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Exception during pool initialization. org.h2.jdbc.JdbcSQLNonTransientConnectionException: Database may be already in use: null. Possible solutions: close all other connection(s); use the server mode [90020-200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:622) ~[h2-1.4.200.jar:1.4.200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:429) ~[h2-1.4.200.jar:1.4.200] at org.h2.message.DbException.get(DbException.java:194) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.convertIllegalStateException(MVTableEngine.java:206) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.open(MVTableEngine.java:182) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine.init(MVTableEngine.java:103) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.getPageStore(Database.java:2659) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.open(Database.java:675) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.openDatabase(Database.java:307) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.<init>(Database.java:301) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:74) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:192) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSessionAndValidate(Engine.java:171) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:166) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:29) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:340) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:173) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:152) ~[h2-1.4.200.jar:1.4.200] at org.h2.Driver.connect(Driver.java:69) ~[h2-1.4.200.jar:1.4.200] at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:364) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:476) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:561) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-4.0.3.jar:na] at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:158) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:116) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79) ~[spring-jdbc-5.3.8.jar:5.3.8] at spring.springintroduction.repository.JdbcMemberRepository.getConnection(JdbcMemberRepository.java:138) ~[classes/:na] at spring.springintroduction.repository.JdbcMemberRepository.findByName(JdbcMemberRepository.java:117) ~[classes/:na] at spring.springintroduction.service.MemberService.validateDuplicateMember(MemberService.java:30) ~[classes/:na] at spring.springintroduction.service.MemberService.join(MemberService.java:23) ~[classes/:na] at spring.springintroduction.controller.MemberController.create(MemberController.java:33) ~[classes/:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1063) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:681) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:228) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1723) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na] Caused by: java.lang.IllegalStateException: The file is locked: nio:C:/Users/hikar/Documents/H2/Spring-introduction.mv.db [1.4.200/7] at org.h2.mvstore.DataUtils.newIllegalStateException(DataUtils.java:950) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.FileStore.open(FileStore.java:172) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore.<init>(MVStore.java:381) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore$Builder.open(MVStore.java:3579) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.open(MVTableEngine.java:170) ~[h2-1.4.200.jar:1.4.200] ... 79 common frames omitted 2021-07-31 15:33:29.017 ERROR 8400 --- [nio-8080-exec-8] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.IllegalStateException: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is org.h2.jdbc.JdbcSQLNonTransientConnectionException: Database may be already in use: null. Possible solutions: close all other connection(s); use the server mode [90020-200]] with root cause java.lang.IllegalStateException: The file is locked: nio:C:/Users/hikar/Documents/H2/Spring-introduction.mv.db [1.4.200/7] at org.h2.mvstore.DataUtils.newIllegalStateException(DataUtils.java:950) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.FileStore.open(FileStore.java:172) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore.<init>(MVStore.java:381) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore$Builder.open(MVStore.java:3579) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.open(MVTableEngine.java:170) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine.init(MVTableEngine.java:103) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.getPageStore(Database.java:2659) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.open(Database.java:675) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.openDatabase(Database.java:307) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.<init>(Database.java:301) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:74) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:192) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSessionAndValidate(Engine.java:171) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:166) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:29) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:340) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:173) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:152) ~[h2-1.4.200.jar:1.4.200] at org.h2.Driver.connect(Driver.java:69) ~[h2-1.4.200.jar:1.4.200] at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:364) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:476) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:561) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-4.0.3.jar:na] at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:158) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:116) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79) ~[spring-jdbc-5.3.8.jar:5.3.8] at spring.springintroduction.repository.JdbcMemberRepository.getConnection(JdbcMemberRepository.java:138) ~[classes/:na] at spring.springintroduction.repository.JdbcMemberRepository.findByName(JdbcMemberRepository.java:117) ~[classes/:na] at spring.springintroduction.service.MemberService.validateDuplicateMember(MemberService.java:30) ~[classes/:na] at spring.springintroduction.service.MemberService.join(MemberService.java:23) ~[classes/:na] at spring.springintroduction.controller.MemberController.create(MemberController.java:33) ~[classes/:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1063) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:681) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:228) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1723) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na] 2021-07-31 15:33:57.540 INFO 8400 --- [nio-8080-exec-3] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting... 2021-07-31 15:33:58.566 ERROR 8400 --- [nio-8080-exec-3] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Exception during pool initialization. org.h2.jdbc.JdbcSQLNonTransientConnectionException: Database may be already in use: null. Possible solutions: close all other connection(s); use the server mode [90020-200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:622) ~[h2-1.4.200.jar:1.4.200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:429) ~[h2-1.4.200.jar:1.4.200] at org.h2.message.DbException.get(DbException.java:194) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.convertIllegalStateException(MVTableEngine.java:206) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.open(MVTableEngine.java:182) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine.init(MVTableEngine.java:103) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.getPageStore(Database.java:2659) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.open(Database.java:675) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.openDatabase(Database.java:307) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.<init>(Database.java:301) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:74) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:192) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSessionAndValidate(Engine.java:171) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:166) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:29) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:340) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:173) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:152) ~[h2-1.4.200.jar:1.4.200] at org.h2.Driver.connect(Driver.java:69) ~[h2-1.4.200.jar:1.4.200] at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:364) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:476) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:561) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-4.0.3.jar:na] at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:158) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:116) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79) ~[spring-jdbc-5.3.8.jar:5.3.8] at spring.springintroduction.repository.JdbcMemberRepository.getConnection(JdbcMemberRepository.java:138) ~[classes/:na] at spring.springintroduction.repository.JdbcMemberRepository.findAll(JdbcMemberRepository.java:90) ~[classes/:na] at spring.springintroduction.service.MemberService.findMembers(MemberService.java:37) ~[classes/:na] at spring.springintroduction.controller.MemberController.list(MemberController.java:40) ~[classes/:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1063) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:228) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1723) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na] Caused by: java.lang.IllegalStateException: The file is locked: nio:C:/Users/hikar/Documents/H2/Spring-introduction.mv.db [1.4.200/7] at org.h2.mvstore.DataUtils.newIllegalStateException(DataUtils.java:950) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.FileStore.open(FileStore.java:172) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore.<init>(MVStore.java:381) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore$Builder.open(MVStore.java:3579) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.open(MVTableEngine.java:170) ~[h2-1.4.200.jar:1.4.200] ... 78 common frames omitted 2021-07-31 15:33:58.570 ERROR 8400 --- [nio-8080-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.IllegalStateException: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is org.h2.jdbc.JdbcSQLNonTransientConnectionException: Database may be already in use: null. Possible solutions: close all other connection(s); use the server mode [90020-200]] with root cause java.lang.IllegalStateException: The file is locked: nio:C:/Users/hikar/Documents/H2/Spring-introduction.mv.db [1.4.200/7] at org.h2.mvstore.DataUtils.newIllegalStateException(DataUtils.java:950) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.FileStore.open(FileStore.java:172) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore.<init>(MVStore.java:381) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.MVStore$Builder.open(MVStore.java:3579) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine$Store.open(MVTableEngine.java:170) ~[h2-1.4.200.jar:1.4.200] at org.h2.mvstore.db.MVTableEngine.init(MVTableEngine.java:103) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.getPageStore(Database.java:2659) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.open(Database.java:675) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.openDatabase(Database.java:307) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Database.<init>(Database.java:301) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:74) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.openSession(Engine.java:192) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSessionAndValidate(Engine.java:171) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:166) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.Engine.createSession(Engine.java:29) ~[h2-1.4.200.jar:1.4.200] at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:340) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:173) ~[h2-1.4.200.jar:1.4.200] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:152) ~[h2-1.4.200.jar:1.4.200] at org.h2.Driver.connect(Driver.java:69) ~[h2-1.4.200.jar:1.4.200] at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:364) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:476) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:561) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-4.0.3.jar:na] at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:158) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:116) ~[spring-jdbc-5.3.8.jar:5.3.8] at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79) ~[spring-jdbc-5.3.8.jar:5.3.8] at spring.springintroduction.repository.JdbcMemberRepository.getConnection(JdbcMemberRepository.java:138) ~[classes/:na] at spring.springintroduction.repository.JdbcMemberRepository.findAll(JdbcMemberRepository.java:90) ~[classes/:na] at spring.springintroduction.service.MemberService.findMembers(MemberService.java:37) ~[classes/:na] at spring.springintroduction.controller.MemberController.list(MemberController.java:40) ~[classes/:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1063) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.8.jar:5.3.8] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.8.jar:5.3.8] at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.48.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:228) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.8.jar:5.3.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1723) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.48.jar:9.0.48] at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na] <소스 코드>

코카콜라 · 2021.07.31 · 스프링 입문 - 코드로 배우는 스프링 부트, 웹 MVC, DB 접근 기술

투표점수

0

조회수

716

답변

7
미해결
스프링 MVC 2편 - 백엔드 웹 개발 활용 기술

errors.properties에 Range={0}, {2} ~ {1} 허용 이라 써 있는 부분 질문입니다.

저는 당연히 순서대로 {1}이 1000을 의미하고 {2}가 1000000을 의미 할 줄 알았는데 {2} ~ {1} 로 써야 1000 ~ 1000000가 나오네요 {1}, {2}의 안의 숫자 1,2의미가 무엇인가요??

qkrwnstns52 · 2021.07.31 · 스프링 MVC 2편 - 백엔드 웹 개발 활용 기술

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자바스크립트 알고리즘 문제풀이 입문(코딩테스트 대비)

시간복잡도 질문입니다!

안녕하세요 선생님~~ 강의에 나온 답안의 시간복잡도는 solution 함수의 for문 안에서 compareMaps 가 실행되고, compareMaps 또한 for문을 가지기 때문에 O(N^2) 이라고 생각했는데 맞나요?? 제가 구현한 코드는 아래와 같은데요 제 코드는 확실히 O(N^2) 인 것 같습니다.. ㅠ function solution(s, t) { let count = 0; let l = 0; // 1. 부분 문자열을 구하는데, t.length와 같은 길이를 가진 문자열을 구한다. for (let r = t.length; r <= s.length; r++) { const temp = s.substring(l++, r); // 2. 그 문자열이 아나그램인지 확인한다. if (isAnagram(temp, t)) count++; else continue; } return count; } function isAnagram(str1, str2) { // 정렬 사용하지 않고 해보기 const map = new Map(); for (let char of str1) { if (map.has(char)) map.set(char, map.get(char) + 1); else map.set(char, 1); } for (let char of str2) { if (!map.has(char)) return false; if (map.has(char) && !map.get(char)) map.set(char, map.get(char) - 1); if (map.get(char) === 0) return false; } return true; } let a = 'bacaAacba'; let b = 'abc'; console.log(solution(a, b));

냠냠냠 · 2021.07.31 · 자바스크립트 알고리즘 문제풀이 입문(코딩테스트 대비)

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자바 ORM 표준 JPA 프로그래밍 - 기본편

안녕하세요 환경설정 때문에 질문 올립니다.

환경설정하다가 문제가 발생해서 질문올립니다. pom.xml설정 문젠데 보시는 바와같이 빨간불이 많이 뜨네요. 선생님이 강의를 찍으실 때와 지금의 인텔리제이 버젼이 달라서 수정을 해야 할 것 같은데 해결방법을 알려주시겠어요~?

carpediem7490 · 2021.07.31 · 자바 ORM 표준 JPA 프로그래밍 - 기본편

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자바스크립트 알고리즘 문제풀이 입문(코딩테스트 대비)

조금 다르게 풀어봤습니다!

선생님 안녕하세요 강의에서 알려주신 방법과 조금 다르게 풀어봤는데 제가 푼 코드도 괜찮은 방법인가요?

임성규 · 2021.07.31 · 자바스크립트 알고리즘 문제풀이 입문(코딩테스트 대비)

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실전! 스프링 부트와 JPA 활용1 - 웹 애플리케이션 개발

IO Exception: null [90028-200] 90028/90028 오류

jpashop.mv.db파일이 생성되지 않고 , IO Exception: null [90028-200] 90028/90028 가 뜨는데 제가 이전 수업에서 사용했던 test.mv.db파일이 있어서 jpashop.mv.db파일이 생성이 안되는건지 모르겠습니다. 도움주시면 감사하겠습니다 ㅜㅜ

신동민 · 2021.07.31 · 실전! 스프링 부트와 JPA 활용1 - 웹 애플리케이션 개발

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iOS/Android 앱 개발을 위한 실전 React Native - Basic

launchImageLibrary 이미지 로드 안 됨

addimage = () => { launchImageLibrary({}, response=>{ this.setState({ avatar: response.uri }) }) } launchImageLibary가 동작하고 사진 선택까지는 되는데 선택한 뒤 화면에 사진 load가 되지 않습니다..! 왜 그러는 걸까요??

eeej42 · 2021.07.31 · iOS/Android 앱 개발을 위한 실전 React Native - Basic

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iOS/Android 앱 개발을 위한 실전 React Native - Basic

showImagePicker 오류

안녕하세요! 다른 댓글을 참고해 launchCamer와 launchLibrary 오류는 해결하였는데 showImagePicker 오류는 해결되지 않아 질문드립니다.. import { launchCamera, launchImageLibrary, showImagePicker } from 'react-native-image-picker'; addimage = () => { showImagePicker({ title: 'Choose your photo', takePhotoButtonTitle: 'Take a pretty one', chooseFromLibraryButtonTitle: 'Select an old one', cancelButtonTitle: 'Just go back' }, response=>{ this.setState({ avatar: response.uri }) }) } 구글링 해봐도 잘 되지 않아 질문 남깁니다!

eeej42 · 2021.07.31 · iOS/Android 앱 개발을 위한 실전 React Native - Basic

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Spring Cloud로 개발하는 마이크로서비스 애플리케이션(MSA)

Visbility

강의 포스팅을 위하여 복습중에 있습니다. 여기서 visibility가 그라파나와 프로메테우스를 말하는것 맞나요??

lulala · 2021.07.31 · Spring Cloud로 개발하는 마이크로서비스 애플리케이션(MSA)

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it 취업을 위한 알고리즘 문제풀이 입문 (with C/C++) : 코딩테스트 대비

질문있습니다

#include <iostream> #include <algorithm> #include <queue> #include <stack> using namespace std; int arr[21]; vector<pair<int,int> > v[21]; int n,m; void dijstra(int k){ if(k == n){ return; } else { for(int i = 0; i < v[k].size(); i++){ int next = v[k][i].first; int nextval = v[k][i].second; if(nextval + arr[k] < arr[next]) arr[next] = nextval + arr[k]; } dijstra(k+1); } } int main() { int a,b,c; scanf("%d %d",&n,&m); for(int i = 0; i < m; i++){ scanf("%d %d %d",&a,&b,&c); v[a].push_back(make_pair(b,c)); // 양방향 가중치 그래프 } for(int i = 1; i <= n; i++){ arr[i] = 2147000000; // 최댓값으로 배열 초기화 } arr[1] = 0; dijstra(1); for(int i = 2; i <= n; i++){ if(arr[i] == 2147000000){ printf("%d : impossible",i); continue; } printf("%d : %d\n",i,arr[i]); } return 0; } - 학습 관련 질문을 남겨주세요. 상세히 작성하면 더 좋아요! - 먼저 유사한 질문이 있었는지 검색해보세요. - 서로 예의를 지키며 존중하는 문화를 만들어가요. - 잠깐! 인프런 서비스 운영 관련 문의는 1:1 문의하기를 이용해주세요. 제가 직접 짠 코드입니다. 실행하면 문제없이 답이 출력됩니다. 하지만 선생님의 답과 많이 다른데 생각해보니 제 코드가 시간복잡도가 높다고 생각됩니다. time complexity가 어느정도 차이나는지 궁금합니다!

김혁수 · 2021.07.31 · it 취업을 위한 알고리즘 문제풀이 입문 (with C/C++) : 코딩테스트 대비

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자바(Java) 알고리즘 문제풀이 입문: 코딩테스트 대비

제 코드 어디가 잘못 됐는지 잘 모르겠습니다

안녕하세요 제가 작성한 코드에 어디가 문제인지 잘 모르겠어 질문합니다. 선생님께서 풀어 주신 방법과 거의 비슷하게 푼것 같은데 어디가 잘못 됐는지 모르겠습니다.(저는 깊은 복사 대신 새로운 객체를 만들었습니다.) import java.util.ArrayList; import java.util.Arrays; import java.util.Scanner; public class Main { public ArrayList<Integer> solution(int n, int[] arr) { ArrayList<Integer> answer = new ArrayList<>(); int[] tmp = new int[n]; for(int i=0; i<n; i++) { tmp[i] = arr[i]; } Arrays.sort(arr); for(int i=0; i<n-1; i++) { if(tmp[i]!=arr[i]) { answer.add(i+1); } } return answer; } public static void main(String[] args) { // TODO Auto-generated method stub Main T = new Main(); Scanner kb = new Scanner(System.in); int n = kb.nextInt(); int[] arr = new int[n]; for(int i=0; i<n; i++) { arr[i] = kb.nextInt(); } for(int x:T.solution(n, arr)) { System.out.print(x+" "); } } }

simononze · 2021.07.31 · 자바(Java) 알고리즘 문제풀이 입문: 코딩테스트 대비

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