인프런 아이디 : oen142@naver.com 인프런 이메일 : oen142@naver.com 깃헙 아이디 : oen142@naver.com 깃헙 Username : oen142  

안녕하세요 선생님 강의 잘 듣고있습니다. 현재 선생님 로드맵을 따라서 스프링 입문까지 마친 학생입니다. 단순 궁금한 점이있는데요 스프링 입문 다음에 스프링 핵심원리 - 기본편 -> HTTP웹 기본지식 으로 되어있는데 강의 순서는 상관없는건가요? HTTP가 스프링핵심원리 기본편과 스프링MVC1편 사이에 껴있는 이유가 궁금합니다.  + 국비수업을 마치고 비전공자라 잘 못따라 갔는데 선생님 덕분에 스프링도 잘 배울수있어서 정말 좋습니다. 고맙습니다. 완강하고 멋진 리뷰 써드리겠습니다.

안녕하세요? 10강 3분 30초 경에 np.log(x.A) 라는 표현식이 나오는데요, 이 lambda 함수를 돌리면, ln(A)의 값이 ln_A에 저장이 되는 것을 확인하였는데, x.A라는 것이 무슨 의미인지 이해가 되지 않아 질문드립니다. x 곱하기 A는 아닌 것 같은데, 정확히 무슨 의미인지 알려주실 수 있을까요? 감사합니다.

배포를 하려다보니 .. 계속 반복해서 영상을 보고있습니다. back과 front 서버를 별도로 둔다면 git도 별도로 만들어서 back 에는 back만 다운받고 front도 front만 다운을 받아서 하는게 더 좋을까요? 

서버사이드 렌더링 페이지가 아닌 그냥 페이지인데  router로 params를 주고 받습니다. 이 페이지를 주소를 복사해서 주소창에 붙여 넣기 해서 엔터치면  router.query 값이 undefined 로 뜨는데 정상적인가요? 서버사이드 렌더링 페이지가 아닌데 주소 복사 붙여넣기 해도 router.query를 받을 수 있는 방법이 있을까요?

안녕하세요! 명강의 감사드립니다 ! 이번에 이분검색을 배우고 뮤직비디오 문제를 풀고 풀이를 봤는데요~ 결정알고리즘이라고 하지만 이분검색 개념과 동일한 느낌이라서요..! 차이점이 있나요? 아니면 같은 말을 다르게 표혀한건가요?? 차이점이 있다면 무엇인지 궁금합니다 !  항상 감사드립니다 !

vscode 코드를 작성하고 라이브 서버로 실행 시키면 사진처럼 나오는데 뭐가 문제인건가요 ?

선생님 풀이에 M, N 이 바꿔서 있군요  ㅜㅜ

안녕하세요 강의에서 참고하는 두번째 프로젝트 리포지토리에 권한이 없네요 권한요청 드립니다. email : siriusjh13@gmail.com name: siriusjh

안녕하세요. 지난 번에 @TransactionRepository 데코레이터를 이용하여 두 가지 방법으로 트랜잭션을 구현했으나, 뜻대로 잘 동작하지 않는 것 같아서 질문을 드렸었습니다. 그래서 이번에는 아래와 같은 조건으로 다시 구현해봤습니다. 1. 트랜잭션을 디테일하게 컨트롤할 수 있는 Connection/QueryRunner 사용 (공식문서에서는 데코레이터를 이용한 트랜잭션을 권장하지 않는다고 기재) 2. Custom Repository를 만들어, 직접 쿼리 수행하는 로직을 분리(?) 위와 같이 구현함으로써 트랜잭션 동작이 정상적으로 동작하는 것을 확인할 수 있었고, 트랜잭션의 범위도 디테일하게 조정할 수 있다는 것도 확인할 수 있었습니다. 그런데, 위와 같은 방식으로 구현하는 것이 과연 좋은 방법일까?라는 의문이 들었습니다. 서비스 계층에서의 코드가 더욱 복잡해지는 거 같고, 특히 커스텀 레포지터리를 메소드 내부에서 불러오는게 옳은 건지도 잘 모르겠습니다ㅠㅜ 이로 인해 나중에 테스트코드 작성이 어려워지는 건 아닐까 싶고... 제로초님의 의견이 궁금하기도 하고, 조언도 부탁드리겠습니다!

요런 버튼을 머라 명칭 하는지 몰라서 죄송해요. 아무리 찾아 봐도 없는데 혹시 데이브님은 아실까봐 질문 남깁니다 . 화면을 만들때 자주 있는데 axure에는 없는것 같네요

- 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. 안녕하세요, 강의 잘 듣고 있습니다! 타임리프를 통해 클래스를 지정하고나서 뒤에 class='form-control' 을 남겨두셨는데 나중에 로컬로 확인하기 위해서 남겨두신건가요?

강의와 오라클 펀더멘탈을 병행하여 공부중인데 UNDO TABLE SPACE 부분에서 크기조정 관련 수식이 나오는데 해당 수식 자세한 해설 부탁드려도 될까요? 너무 어려워서요 ㅜㅜ UndoSpace = [UR * (UPS * DBS)] + (DBS * 24)

안녕하세요 몽고DB를 사용하면서도 잘 이해가 안되는거같아 몽고DB를 공부하면서 이 강의에서 작성했던 코드와 비교하면서 보고있는데요 다른 예제 코드들에서는 스키마를 생성할때 항상 new키워드를 붙여서 인스턴스를 생성하는 것으로 보이는데 이 강의에서 작성하는 유저 모델 스키마는 그렇지 않길래 어떤 차이가 있나 궁금해서 질문을 남깁니다 new를 생략해도 동일하게 동작하는건지, 다르게 동작하는데 어떠한 이유가 있어서 이 강의에서는 new없이 스키마를 생성한건지 궁금하네요

autocomplete-python traceback output: 라는 오류가 오른쪽 상단에 빨간칸으로 계속 떠요 무슨 뜻인지도 모르겠네요 ㅜ.ㅜ 어떻게 해결하나요?

원래 JoinColumn 값은 꼭 join으로 불러와서 사용해야하나요? 직접 건드리는건 불가능하나요

안녕하세요. 배포후 화면에서 일부 파일들 (js, font관련, jpg, svg)이 생략되어 확인해보니 collectstatic 이후 만들어진 staticfiles에 해당파일들이 누락된것을 확인하였습니다.  로컬에서는 괜찮은지 확인을해보았고 로컬에서는 정상적으로 staticfiles가 만들어졌습니다. 누락된 파일은 fonts 폴더, temp폴더, magicgid.js 등 입니다. 모두 runserver로 배포한 이후에 추가했던 것들이고 새로 이미지와 컨테이너를 만들어 배포한 이후부터 문제가 발생했습니다. 캐시문제인가도 싶어 도커파일도 여러번 확인해보고 CLI로 static 내부도 확인해보았으나 static에는 파일이 잘 들어간것을 보아 collectstatic이 실행되는 과정에서 문제가 생긴것 같습니다. 5,6번정도 더 시도해보다가 이렇게 질문을 드립니다. 아래는 도커파일 이미지와 깃허브 주소입니다. https://github.com/Aiden-Kwak/oconnect_vultr 감사합니다

안녕하세요 선생님 선생님의 강의를 기반으로 졸업작품을 만들고 있는 학생입니다.  카페 24 에서 클라우드를 사용하여 컨피그 서버를 배포해보았습니다. 맥 환경의 로컬에서 도커 컨테이너를 사용하여 컨피그 서버를 사용했을 때는 깃 설정 정보들이 잘 불러와졌는데 카페 24의 클라우드에서는 도커 컨테이너를 사용하여 컨피그 서버를 사용했을 때는 깃 설정 정보가 불러와지지 않고 아래의 에러가 계속 발생합니다. 클라우드의 인바운드 어댑터와 아웃바운드 어댑터 모두 udp tcp 를 다 열어놓았고  SSL 관련 문제인거 같은데 spring cloud config 관련하여 검색했는데 제대로 된 답변이 없어서 선생님께 질문드립니다. org.eclipse.jgit.api.errors.TransportException: https://github.com/juhwan0815/spring-cloud-config: cannot open git-upload-pack at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:254) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.api.CloneCommand.fetch(CloneCommand.java:306) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.api.CloneCommand.call(CloneCommand.java:200) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.springframework.cloud.config.server.environment.JGitEnvironmentRepository.cloneToBasedir(JGitEnvironmentRepository.java:612) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.JGitEnvironmentRepository.copyRepository(JGitEnvironmentRepository.java:587) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.JGitEnvironmentRepository.createGitClient(JGitEnvironmentRepository.java:570) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.JGitEnvironmentRepository.refresh(JGitEnvironmentRepository.java:267) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.JGitEnvironmentRepository.getLocations(JGitEnvironmentRepository.java:245) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.MultipleJGitEnvironmentRepository.getLocations(MultipleJGitEnvironmentRepository.java:139) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.AbstractScmEnvironmentRepository.findOne(AbstractScmEnvironmentRepository.java:55) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.MultipleJGitEnvironmentRepository.findOne(MultipleJGitEnvironmentRepository.java:173) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.CompositeEnvironmentRepository.findOne(CompositeEnvironmentRepository.java:64) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.EnvironmentEncryptorEnvironmentRepository.findOne(EnvironmentEncryptorEnvironmentRepository.java:61) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.EnvironmentController.getEnvironment(EnvironmentController.java:131) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.EnvironmentController.defaultLabel(EnvironmentController.java:108) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78) ~[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.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:282) ~[spring-core-5.3.7.jar!/:5.3.7] at org.springframework.cloud.context.scope.GenericScope$LockedScopedProxyFactoryBean.invoke(GenericScope.java:485) ~[spring-cloud-context-3.0.3.jar!/:3.0.3] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.7.jar!/:5.3.7] at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) ~[spring-aop-5.3.7.jar!/:5.3.7] at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:692) ~[spring-aop-5.3.7.jar!/:5.3.7] at org.springframework.cloud.config.server.environment.EnvironmentController$$EnhancerBySpringCGLIB$$487a538f.defaultLabel(<generated>) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78) ~[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-5.3.7.jar!/:5.3.7] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1063) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at javax.servlet.http.HttpServlet.service(HttpServlet.java:626) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.7.jar!/:5.3.7] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.7.jar!/:5.3.7] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.7.jar!/:5.3.7] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.7.jar!/:5.3.7] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:97) ~[spring-boot-actuator-2.4.6.jar!/:2.4.6] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.7.jar!/:5.3.7] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.7.jar!/:5.3.7] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.7.jar!/:5.3.7] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.46.jar!/:na] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[na:na] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.46.jar!/:na] at java.base/java.lang.Thread.run(Thread.java:831) ~[na:na] Caused by: org.eclipse.jgit.errors.TransportException: https://github.com/juhwan0815/spring-cloud-config: cannot open git-upload-pack at org.eclipse.jgit.transport.TransportHttp.connect(TransportHttp.java:600) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.transport.TransportHttp.openFetch(TransportHttp.java:362) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.transport.FetchProcess.executeImp(FetchProcess.java:137) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.transport.FetchProcess.execute(FetchProcess.java:123) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.transport.Transport.fetch(Transport.java:1271) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:243) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] ... 78 common frames omitted Caused by: org.apache.http.conn.ConnectTimeoutException: Connect to github.com:443 [github.com/15.164.81.167] failed: Read timed out at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:151) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:376) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:393) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56) ~[httpclient-4.5.13.jar!/:4.5.13] at org.eclipse.jgit.transport.http.apache.HttpClientConnection.execute(HttpClientConnection.java:254) ~[org.eclipse.jgit.http.apache-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.transport.http.apache.HttpClientConnection.getResponseCode(HttpClientConnection.java:231) ~[org.eclipse.jgit.http.apache-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.util.HttpSupport.response(HttpSupport.java:207) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.transport.TransportHttp.connect(TransportHttp.java:514) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] ... 83 common frames omitted Caused by: java.net.SocketTimeoutException: Read timed out at java.base/sun.nio.ch.NioSocketImpl.timedRead(NioSocketImpl.java:283) ~[na:na] at java.base/sun.nio.ch.NioSocketImpl.implRead(NioSocketImpl.java:309) ~[na:na] at java.base/sun.nio.ch.NioSocketImpl.read(NioSocketImpl.java:350) ~[na:na] at java.base/sun.nio.ch.NioSocketImpl$1.read(NioSocketImpl.java:803) ~[na:na] at java.base/java.net.Socket$SocketInputStream.read(Socket.java:962) ~[na:na] at java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:478) ~[na:na] at java.base/sun.security.ssl.SSLSocketInputRecord.readHeader(SSLSocketInputRecord.java:472) ~[na:na] at java.base/sun.security.ssl.SSLSocketInputRecord.decode(SSLSocketInputRecord.java:160) ~[na:na] at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:111) ~[na:na] at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1501) ~[na:na] at java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1415) ~[na:na] at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:450) ~[na:na] at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:421) ~[na:na] at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:436) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:384) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142) ~[httpclient-4.5.13.jar!/:4.5.13] ... 97 common frames omitted 2021-07-05 18:27:52.850 WARN 1 --- [nio-8888-exec-1] o.s.c.c.s.e.EnvironmentController : Error getting the Environment with name=user-service profiles=default label=null includeOrigin=false org.springframework.cloud.config.server.environment.NoSuchRepositoryException: Cannot clone or checkout repository: https://github.com/juhwan0815/spring-cloud-config at org.springframework.cloud.config.server.environment.JGitEnvironmentRepository.refresh(JGitEnvironmentRepository.java:291) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.JGitEnvironmentRepository.getLocations(JGitEnvironmentRepository.java:245) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.MultipleJGitEnvironmentRepository.getLocations(MultipleJGitEnvironmentRepository.java:139) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.AbstractScmEnvironmentRepository.findOne(AbstractScmEnvironmentRepository.java:55) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.MultipleJGitEnvironmentRepository.findOne(MultipleJGitEnvironmentRepository.java:173) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.CompositeEnvironmentRepository.findOne(CompositeEnvironmentRepository.java:64) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.EnvironmentEncryptorEnvironmentRepository.findOne(EnvironmentEncryptorEnvironmentRepository.java:61) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.EnvironmentController.getEnvironment(EnvironmentController.java:131) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.EnvironmentController.defaultLabel(EnvironmentController.java:108) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78) ~[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.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:282) ~[spring-core-5.3.7.jar!/:5.3.7] at org.springframework.cloud.context.scope.GenericScope$LockedScopedProxyFactoryBean.invoke(GenericScope.java:485) ~[spring-cloud-context-3.0.3.jar!/:3.0.3] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.7.jar!/:5.3.7] at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) ~[spring-aop-5.3.7.jar!/:5.3.7] at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:692) ~[spring-aop-5.3.7.jar!/:5.3.7] at org.springframework.cloud.config.server.environment.EnvironmentController$$EnhancerBySpringCGLIB$$487a538f.defaultLabel(<generated>) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78) ~[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-5.3.7.jar!/:5.3.7] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1063) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at javax.servlet.http.HttpServlet.service(HttpServlet.java:626) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.7.jar!/:5.3.7] at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.7.jar!/:5.3.7] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.7.jar!/:5.3.7] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.7.jar!/:5.3.7] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.7.jar!/:5.3.7] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:97) ~[spring-boot-actuator-2.4.6.jar!/:2.4.6] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.7.jar!/:5.3.7] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.7.jar!/:5.3.7] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.7.jar!/:5.3.7] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707) ~[tomcat-embed-core-9.0.46.jar!/:na] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.46.jar!/:na] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[na:na] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.46.jar!/:na] at java.base/java.lang.Thread.run(Thread.java:831) ~[na:na] Caused by: org.eclipse.jgit.api.errors.TransportException: https://github.com/juhwan0815/spring-cloud-config: cannot open git-upload-pack at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:254) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.api.CloneCommand.fetch(CloneCommand.java:306) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.api.CloneCommand.call(CloneCommand.java:200) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.springframework.cloud.config.server.environment.JGitEnvironmentRepository.cloneToBasedir(JGitEnvironmentRepository.java:612) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.JGitEnvironmentRepository.copyRepository(JGitEnvironmentRepository.java:587) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.JGitEnvironmentRepository.createGitClient(JGitEnvironmentRepository.java:570) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] at org.springframework.cloud.config.server.environment.JGitEnvironmentRepository.refresh(JGitEnvironmentRepository.java:267) ~[spring-cloud-config-server-3.0.4.jar!/:3.0.4] ... 72 common frames omitted Caused by: org.eclipse.jgit.errors.TransportException: https://github.com/juhwan0815/spring-cloud-config: cannot open git-upload-pack at org.eclipse.jgit.transport.TransportHttp.connect(TransportHttp.java:600) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.transport.TransportHttp.openFetch(TransportHttp.java:362) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.transport.FetchProcess.executeImp(FetchProcess.java:137) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.transport.FetchProcess.execute(FetchProcess.java:123) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.transport.Transport.fetch(Transport.java:1271) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:243) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] ... 78 common frames omitted Caused by: org.apache.http.conn.ConnectTimeoutException: Connect to github.com:443 [github.com/15.164.81.167] failed: Read timed out at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:151) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:376) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:393) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56) ~[httpclient-4.5.13.jar!/:4.5.13] at org.eclipse.jgit.transport.http.apache.HttpClientConnection.execute(HttpClientConnection.java:254) ~[org.eclipse.jgit.http.apache-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.transport.http.apache.HttpClientConnection.getResponseCode(HttpClientConnection.java:231) ~[org.eclipse.jgit.http.apache-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.util.HttpSupport.response(HttpSupport.java:207) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] at org.eclipse.jgit.transport.TransportHttp.connect(TransportHttp.java:514) ~[org.eclipse.jgit-5.1.3.201810200350-r.jar!/:5.1.3.201810200350-r] ... 83 common frames omitted Caused by: java.net.SocketTimeoutException: Read timed out at java.base/sun.nio.ch.NioSocketImpl.timedRead(NioSocketImpl.java:283) ~[na:na] at java.base/sun.nio.ch.NioSocketImpl.implRead(NioSocketImpl.java:309) ~[na:na] at java.base/sun.nio.ch.NioSocketImpl.read(NioSocketImpl.java:350) ~[na:na] at java.base/sun.nio.ch.NioSocketImpl$1.read(NioSocketImpl.java:803) ~[na:na] at java.base/java.net.Socket$SocketInputStream.read(Socket.java:962) ~[na:na] at java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:478) ~[na:na] at java.base/sun.security.ssl.SSLSocketInputRecord.readHeader(SSLSocketInputRecord.java:472) ~[na:na] at java.base/sun.security.ssl.SSLSocketInputRecord.decode(SSLSocketInputRecord.java:160) ~[na:na] at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:111) ~[na:na] at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1501) ~[na:na] at java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1415) ~[na:na] at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:450) ~[na:na] at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:421) ~[na:na] at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:436) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:384) ~[httpclient-4.5.13.jar!/:4.5.13] at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142) ~[httpclient-4.5.13.jar!/:4.5.13] ... 97 common frames omitted

교육자료에서 home.html가져와서 붙여넣기하고 static/img/lion.jpg가 있는데도 이미지가 출력이 안되네요. Django 3.2.5 version입니다.

RxJava 1부 강의 예제 ObservableFromFutureExample.java에서 스케줄러 computation을 적용해보았습니다. (코드 일부를 추가해보았습니다.) - ObservableFromFutureExample.java public class ObservableFromFutureExample { public static void main(String[] args) throws ExecutionException, InterruptedException { Logger.log(LogType.PRINT, "# start time : "); TimeUtil.start(); // 긴 처리 시간이 걸리는 작업 Future<Double> future = longTimeWork(); // 짧은 처리 시간이 걸리는 작업 shortTimeWork(); Observable.fromFuture(future) .subscribeOn(Schedulers.computation()) .subscribe(data -> Logger.log(LogType.PRINT, "# 긴 처리 시간 작업 결과 : " + data)); TimeUtil.end(); TimeUtil.takeTime(); Logger.log(LogType.PRINT, "# end time" ); } public static CompletableFuture<Double> longTimeWork(){ return CompletableFuture.supplyAsync(() -> calculate()); } private static Double calculate() { Logger.log(LogType.PRINT, "# 긴 처리 시간이 걸리는 작업 중........."); TimeUtil.sleep(6000L); return 100000000000000000.0; } private static void shortTimeWork() { TimeUtil.sleep(3000L); Logger.log(LogType.PRINT, "# 짧은 처리 시간 작업 완료!"); }} - Result print() | main | 02:35:32.127 | # start time : print() | ForkJoinPool.commonPool-worker-3 | 02:35:32.136 | # 긴 처리 시간이 걸리는 작업 중......... print() | main | 02:35:35.151 | # 짧은 처리 시간 작업 완료! # 실행시간: 3120 ms print() | main | 02:35:35.250 | # end time 1. Schedulers.computation()를 적용하면 subscribe( ) 메소드에서 구독자에게 발행되는 데이터 결과 값이 출력되지 않는 이유를 알고 싶습니다. 2. Schedules.computation()을 적용했음에도 불구하고 위 결과처럼 'ForkJoinPool.commonPool-worker-3'라는 스레드에서 실행되는 이유를 알고 싶습니다! * 2. 자문자답CompletableFuture.java를 살펴보았더니, supplyAsync( ) 메소드의 기본 실행자가 ForkJoinPool.commonPool()이라는 설명을 찾았습니다. - CompletableFuture.java /** * Default executor -- ForkJoinPool.commonPool() unless it cannot * support parallelism. */private static final Executor ASYNC_POOL = USE_COMMON_POOL ? ForkJoinPool.commonPool() : new ThreadPerTaskExecutor(); 그렇다면, fromFuture( ) 및 CompletableFuture를 이용하는 경우 subscribeOn( ) 함수로 굳이 스케줄러를 지정하지 않아도 되는건가요?