plugins { id 'org.springframework.boot' version '2.5.3' id 'io.spring.dependency-management' version '1.0.11.RELEASE' id 'java' //querydsl 추가 id "com.ewerk.gradle.plugins.querydsl" version "1.0.10"}group = 'study'version = '0.0.1-SNAPSHOT'sourceCompatibility = '11'configurations { compileOnly { extendsFrom annotationProcessor }}repositories { mavenCentral()}dependencies { implementation 'org.springframework.boot:spring-boot-starter-data-jpa' implementation 'org.springframework.boot:spring-boot-starter-web' compileOnly 'org.projectlombok:lombok' runtimeOnly 'com.h2database:h2' annotationProcessor 'org.projectlombok:lombok' testImplementation 'org.springframework.boot:spring-boot-starter-test' //querydsl 추가 implementation 'com.querydsl:querydsl-jpa'}test { useJUnitPlatform()}//querydsl 추가 시작def querydslDir = "$buildDir/generated/querydsl"querydsl { jpa = true querydslSourcesDir = querydslDir}sourceSets { main.java.srcDir querydslDir}configurations { querydsl.extendsFrom compileClasspath}compileQuerydsl { options.annotationProcessorPath = configurations.querydsl}//querydsl 추가 끝 영한님이 올려주신대로 그대로 gradle 코드를 작성하여 돌려보았는데, The AbstractCompile.destinationDir property has been deprecated. This is scheduled to be removed in Gradle 8.0. Please use the destinationDirectory property instead.  이런 오류가 뜨더군요. 그래서 오류에 나와있는 해결방법대로 destinationDir를 찾아 바꿔주려하는데 이와 똑같은 단어가 gradle내에 존재하지 않아서 어떤걸 바꿔줘야할지 모르겠습니다. 뒤가 Dir로 끝나는 것들을 전부 Directory로 바꿔주면서 해봤는데도 잘 안되더군요. 혹시 어디를 수정하면 될까요?

res.cookie("name",value,{     path:"/" }); 여기서 path 를 여러개 지정할수 있나요? 예를들어 /login 이랑 /room 두개의 경로를 지정해 지정한 경로에만 쿠키를 보여주고  나머지 경로에는 안보여주고 싶은데 어떻게 하는것이 좋을까요?

예제를 보면 useEffect를 사용해서 등록된 이벤트 리스너addEventListener(), removeEventListener()를 클린업 해주는데, 이렇게 처리하는 이유가 궁금합니다. 또 리엑트에서는 왜 클린업을 해줘야 하는건가요?

A라는 프로젝트를 생성해서 작업할 때, ios / 안드로이드 / 웹 / 디자인시스템 각각 따로 파일을 생성하잖아요. 궁금한점은 디자인시스템 파일을 따로 만들었을 경우에, 각각의 ios/안드로이드/웹에서 그걸 불러와서 사용할 수 있나요? 디자인시스템이 같은 파일 안에 있어야 불러올수 있는것 아니에요? 스케치의 라이브러리 같은 기능이 있나요?

안녕하세요 <7강 - Express의 파일 설명> 강의를 들으며 수업을 따라가던 중 문의사항이 생겨 글을 남깁니다 제가 현재 vscode를 이용해 수업내용을 따라가고 있었는데 7강에서 webstorm의 템플릿을 그대로 사용하는바람에 vscode로는 진행할 수가 없게되었습니다 혹시 vscode로 동일한 방식의 template을 생성할 수 있을까요? 아니면 기본 템플릿 코드파일을 공유받을 수 있을까요? 감사합니다

히트냐, 미스냐를 판단할떄 for문을 돌려서 확인하지않고  includes를 사용하여 판단하면 성능상 문제가있을까요??

- import sys from collections import deque sys.stdin=open("input.txt", "r") need=input() n=int(input()) for i in range(n):     plan=input()     dq=deque(need)     for x in plan:         if x in dq:             if x!=dq.popleft():                 print("#%d NO" %(i+1))                 break    else:      if len(dq)==0:          print("#%d YES" %(i+1))      else:          print("#%d NO" %(i+1)) 이 문법에서요 else는 if 문이랑 짝이 아닌가요? 답안지를 보면 디번 else는 for문이랑 짝이 된것 같은데 제가 어떤걸 잘못알고 있는지 가르쳐 주세요~

투포인터와는 거리가 먼거같지만.. 혹시 이렇게 WHILE 문이 쓰이는 경우에 위와같은 코드는  시간복잡도 계산이 어떻게 되나요? while에서 배열의 길이만큼 n번씩 포문안에서 n번씩 돌게되니까 시간복잡도가 n제곱이 되는것인지 아니면 와일문은 따로 단순히 와일문은 제외하고 안에서 포문도는 횟수만 따져서 시간복잡도가 N인되는지 궁금합니다

인텔리제이 무료버전으로도 선생님 로드맵 무리없이 쭈욱 따라갈 수 있나요?

해당 강의에서는 사진을 s3에 업로드해서 s3에 저장하고 해당 저장 주소를 받아와서 주소를 db에 저장하는 방식인데 제가 구현하고자 하는 방식은 업로드 하지않고 s3에 데이터를 미리 저장해놓고, 해당 s3주소를 db에 미리 저장해두고 화면단에 데이터를 뿌리고 싶은데요 이러한 경우에는 어떤식으로 구현해야 할까요?? 그냥 s3에 특정 폴더를 생성하고 직접 업로드하고 배열을 돌리는 방식으로나 그런식으로 받아와서 db에 저장해야 하나요???

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

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. 

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!

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???

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>

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!

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.    

선생님 혹시 인스타그램이나 타사이트 클론코딩 한것도 회사나 프리랜서하면서 포트폴리오로 제출할수있나요?

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. 

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>