#foreach

Jpa 커스텀 리포지토리 다중 상속 문제

커스텀 리포지토리 사용중 문제가 발생하여 질문 드립니다. @Repository public interface UserRepository extends JpaRepository<User, Long>, CustomRepository { Optional<User> findByUserId(String userId); } public interface CustomRepository { Long search(User user); } public class ACustomRepositoryImpl implements CustomRepository { @Override public Long search(User user) { return 1L; } } 이런식으로 코드를 작성하고 실행 시키면 아래와 같은 에러 메시지가 나옵니다. 그런데 ACustomRepositoryImpl 구현체 이름을 CustomRepositoryImpl 이렇게 바꾸면 정상적으로 실행됩니다. 명명규칙이 그저 개발자들 간의 약속 인줄 알았는데 규칙을 무조건 지켜야 하는 건지 궁금하여 질문 드렸습니다. Caused by: org.springframework.data.mapping.PropertyReferenceException: No property 'search' found for type 'User' at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:90) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:443) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:419) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.lambda$from$0(PropertyPath.java:372) ~[spring-data-commons-3.2.2.jar:3.2.2] at java.base/java.util.concurrent.ConcurrentMap.computeIfAbsent(ConcurrentMap.java:330) ~[na:na] at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:354) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:332) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.Part.<init>(Part.java:81) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.PartTree$OrPart.lambda$new$0(PartTree.java:259) ~[spring-data-commons-3.2.2.jar:3.2.2] at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[na:na] at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) ~[na:na] at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na] at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[na:na] at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na] at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[na:na] at org.springframework.data.repository.query.parser.PartTree$OrPart.<init>(PartTree.java:260) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.PartTree$Predicate.lambda$new$0(PartTree.java:389) ~[spring-data-commons-3.2.2.jar:3.2.2] at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[na:na] at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) ~[na:na] at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na] at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[na:na] at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na] at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[na:na] at org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:390) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:100) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:100) ~[spring-data-jpa-3.2.2.jar:3.2.2] ... 79 common frames omitted

JpaRepository 다중상속 오류

JpaRepository에 다중상속으로 CustomRepository를 상속하려고 합니다. 근데 자꾸 에러가 나서 질문 드립니다. @Repository public interface UserRepository extends JpaRepository<User, Long>, CustomRepository { Optional<User> findByUserId(String userId); } public interface CustomRepository { void search(); } 에러 메시지 ========================================================= Caused by: org.springframework.data.mapping.PropertyReferenceException: No property 'search' found for type 'User' at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:90) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:443) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:419) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.lambda$from$0(PropertyPath.java:372) ~[spring-data-commons-3.2.2.jar:3.2.2] at java.base/java.util.concurrent.ConcurrentMap.computeIfAbsent(ConcurrentMap.java:330) ~[na:na] at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:354) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:332) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.Part.<init>(Part.java:81) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.PartTree$OrPart.lambda$new$0(PartTree.java:259) ~[spring-data-commons-3.2.2.jar:3.2.2] at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[na:na] at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) ~[na:na] at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na] at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[na:na] at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na] at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[na:na] at org.springframework.data.repository.query.parser.PartTree$OrPart.<init>(PartTree.java:260) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.PartTree$Predicate.lambda$new$0(PartTree.java:389) ~[spring-data-commons-3.2.2.jar:3.2.2] at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[na:na] at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) ~[na:na] at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na] at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[na:na] at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na] at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[na:na] at org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:390) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:100) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:100) ~[spring-data-jpa-3.2.2.jar:3.2.2] ... 79 common frames omitted

aws spring boot 배포 오류

안녕하세요 백엔드 공부 중인 학생입니다. aws ec2로 Spring boot 프로젝트를 배포 시도 중에 있습니다. (maven, java 8, jar) java -jar jar파일명.jar 명령어로 배포 시도 중에 에러메세지가 도저히 해결이 안되어서 도움 요청드립니다.. 도와주신다면 감사하겠습니다.. 아 참고로 rds로 데이터베이스 생성하지 않고 mysql(workbench)로 데이터베이스 생성했습니다 <오류메세지> Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2024-02-07 04:33:35.742 ERROR 31012 --- [ main] o.s.boot.SpringApplication : Application run failed org.springframework.context.ApplicationContextException: Failed to start bean 'webServerStartStop'; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181) ~[spring-context-5.3.22.jar!/:5.3.22] at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54) ~[spring-context-5.3.22.jar!/:5.3.22] at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) ~[spring-context-5.3.22.jar!/:5.3.22] at java.lang.Iterable.forEach(Iterable.java:75) ~[na:1.8.0_392] at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155) ~[spring-context-5.3.22.jar!/:5.3.22] at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123) ~[spring-context-5.3.22.jar!/:5.3.22] at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:935) ~[spring-context-5.3.22.jar!/:5.3.22] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) ~[spring-context-5.3.22.jar!/:5.3.22] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734) [spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) [spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) [spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) [spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295) [spring-boot-2.7.2.jar!/:2.7.2] at com.se.social.SocialApplication.main(SocialApplication.java:13) [classes!/:0.0.1-SNAPSHOT] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_392] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_392] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_392] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_392] at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49) [social-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT] at org.springframework.boot.loader.Launcher.launch(Launcher.java:108) [social-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT] at org.springframework.boot.loader.Launcher.launch(Launcher.java:58) [social-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT] at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:65) [social-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT] Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:229) ~[spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.boot.web.servlet.context.WebServerStartStopLifecycle.start(WebServerStartStopLifecycle.java:43) ~[spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178) ~[spring-context-5.3.22.jar!/:5.3.22] ... 22 common frames omitted Caused by: java.lang.IllegalArgumentException: standardService.connector.startFailed at org.apache.catalina.core.StandardService.addConnector(StandardService.java:238) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.addPreviouslyRemovedConnectors(TomcatWebServer.java:282) ~[spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:213) ~[spring-boot-2.7.2.jar!/:2.7.2] ... 24 common frames omitted Caused by: org.apache.catalina.LifecycleException: Protocol handler start failed at org.apache.catalina.connector.Connector.startInternal(Connector.java:1077) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.apache.catalina.core.StandardService.addConnector(StandardService.java:234) ~[tomcat-embed-core-9.0.65.jar!/:na] ... 26 common frames omitted Caused by: java.net.SocketException: Permission denied at sun.nio.ch.Net.bind0(Native Method) ~[na:1.8.0_392] at sun.nio.ch.Net.bind(Net.java:461) ~[na:1.8.0_392] at sun.nio.ch.Net.bind(Net.java:453) ~[na:1.8.0_392] at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:222) ~[na:1.8.0_392] at org.apache.tomcat.util.net.NioEndpoint.initServerSocket(NioEndpoint.java:275) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:230) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.apache.tomcat.util.net.AbstractEndpoint.bindWithCleanup(AbstractEndpoint.java:1227) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:1313) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:614) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.apache.catalina.connector.Connector.startInternal(Connector.java:1074) ~[tomcat-embed-core-9.0.65.jar!/:na] ... 28 common frames omitted <전체> . ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.7.2) 2024-02-07 04:33:27.975 INFO 31012 --- [ main] com.se.social.SocialApplication : Starting SocialApplication v0.0.1-SNAPSHOT using Java 1.8.0_392 on ip-172-31-39-15 with PID 31012 (/home/ubuntu/socialboardPJ/target/social-0.0.1-SNAPSHOT.jar started by ubuntu in /home/ubuntu/socialboardPJ/target) 2024-02-07 04:33:27.980 INFO 31012 --- [ main] com.se.social.SocialApplication : No active profile set, falling back to 1 default profile: "default" 2024-02-07 04:33:29.591 INFO 31012 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode. 2024-02-07 04:33:29.681 INFO 31012 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 76 ms. Found 1 JPA repository interfaces. 2024-02-07 04:33:30.960 INFO 31012 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 80 (http) 2024-02-07 04:33:30.986 INFO 31012 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat] 2024-02-07 04:33:30.987 INFO 31012 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.65] 2024-02-07 04:33:31.641 INFO 31012 --- [ main] org.apache.jasper.servlet.TldScanner : At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time. 2024-02-07 04:33:31.880 INFO 31012 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2024-02-07 04:33:31.880 INFO 31012 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 3717 ms 2024-02-07 04:33:32.215 INFO 31012 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting... 2024-02-07 04:33:32.569 INFO 31012 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed. 2024-02-07 04:33:32.659 INFO 31012 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default] 2024-02-07 04:33:32.822 INFO 31012 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.6.10.Final 2024-02-07 04:33:33.157 INFO 31012 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final} 2024-02-07 04:33:33.383 INFO 31012 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL8Dialect 2024-02-07 04:33:34.255 INFO 31012 --- [ main] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform] 2024-02-07 04:33:34.266 INFO 31012 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default' 2024-02-07 04:33:34.906 WARN 31012 --- [ main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning 2024-02-07 04:33:35.616 WARN 31012 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Failed to start bean 'webServerStartStop'; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server 2024-02-07 04:33:35.620 INFO 31012 --- [ main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default' 2024-02-07 04:33:35.624 INFO 31012 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated... 2024-02-07 04:33:35.646 INFO 31012 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed. 2024-02-07 04:33:35.650 INFO 31012 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat] 2024-02-07 04:33:35.676 INFO 31012 --- [ main] ConditionEvaluationReportLoggingListener : Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2024-02-07 04:33:35.742 ERROR 31012 --- [ main] o.s.boot.SpringApplication : Application run failed org.springframework.context.ApplicationContextException: Failed to start bean 'webServerStartStop'; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181) ~[spring-context-5.3.22.jar!/:5.3.22] at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54) ~[spring-context-5.3.22.jar!/:5.3.22] at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) ~[spring-context-5.3.22.jar!/:5.3.22] at java.lang.Iterable.forEach(Iterable.java:75) ~[na:1.8.0_392] at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155) ~[spring-context-5.3.22.jar!/:5.3.22] at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123) ~[spring-context-5.3.22.jar!/:5.3.22] at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:935) ~[spring-context-5.3.22.jar!/:5.3.22] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) ~[spring-context-5.3.22.jar!/:5.3.22] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734) [spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) [spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) [spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) [spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295) [spring-boot-2.7.2.jar!/:2.7.2] at com.se.social.SocialApplication.main(SocialApplication.java:13) [classes!/:0.0.1-SNAPSHOT] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_392] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_392] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_392] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_392] at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49) [social-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT] at org.springframework.boot.loader.Launcher.launch(Launcher.java:108) [social-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT] at org.springframework.boot.loader.Launcher.launch(Launcher.java:58) [social-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT] at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:65) [social-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT] Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:229) ~[spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.boot.web.servlet.context.WebServerStartStopLifecycle.start(WebServerStartStopLifecycle.java:43) ~[spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178) ~[spring-context-5.3.22.jar!/:5.3.22] ... 22 common frames omitted Caused by: java.lang.IllegalArgumentException: standardService.connector.startFailed at org.apache.catalina.core.StandardService.addConnector(StandardService.java:238) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.addPreviouslyRemovedConnectors(TomcatWebServer.java:282) ~[spring-boot-2.7.2.jar!/:2.7.2] at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:213) ~[spring-boot-2.7.2.jar!/:2.7.2] ... 24 common frames omitted Caused by: org.apache.catalina.LifecycleException: Protocol handler start failed at org.apache.catalina.connector.Connector.startInternal(Connector.java:1077) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.apache.catalina.core.StandardService.addConnector(StandardService.java:234) ~[tomcat-embed-core-9.0.65.jar!/:na] ... 26 common frames omitted Caused by: java.net.SocketException: Permission denied at sun.nio.ch.Net.bind0(Native Method) ~[na:1.8.0_392] at sun.nio.ch.Net.bind(Net.java:461) ~[na:1.8.0_392] at sun.nio.ch.Net.bind(Net.java:453) ~[na:1.8.0_392] at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:222) ~[na:1.8.0_392] at org.apache.tomcat.util.net.NioEndpoint.initServerSocket(NioEndpoint.java:275) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:230) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.apache.tomcat.util.net.AbstractEndpoint.bindWithCleanup(AbstractEndpoint.java:1227) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:1313) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:614) ~[tomcat-embed-core-9.0.65.jar!/:na] at org.apache.catalina.connector.Connector.startInternal(Connector.java:1074) ~[tomcat-embed-core-9.0.65.jar!/:na] ... 28 common frames omitted

리액트 비동기 문제일까요 ㅠㅠ?

안녕하세요! 이번에 팔로우 추천 목록을 불러오는 것을 만드는 중인데 문제가 생겨서 질문 남깁니다. 원하는 결과대로라면 내가 팔로우 한 사람들을 불러온 후, 그 사람들의 팔로잉 리스트를 불러오고, 조건에 충족 한다면 저의 추천 팔로우 리스트에 포함시키는 것입니다. 하지만 결과가 저 자신이 팔로우 추천으로 뜨더라구요 ....ㅠㅠ getRecFollowingList의 결과를 콘솔로 찍었을 때 첫 번째, 두 번째 useEffect에서 모두 저 자신의 팔로잉 리스트를 불러옵니다.... ㅠㅠ 제가 생각했을 때, 첫 번째 useEffect에서 setMyFollowList한 것이 아직 반영되지 않아서 두 번째 myFollowList가 forEach를 못 도는 건지... 아니면 getRecFollowingList가 통신이 제대로 안되는건지 모르겠습니다.

documentFragment를 활용하여 리팩토링 하였지만 오히려 속도가 더 느려졌네요. 원인이 궁금합니다.

<select></select> <select></select> <select></select> ... var targetArr = document.querySelectorAll("select"); var optionArr = [ {CODE_NAME: "one", CODE_ID: 1}, {CODE_NAME: "two", CODE_ID: 2}, ... ]; 이런 환경에서 optionArr을 가지고 모든 select에 option을 넣어주려고 합니다. 기존 소스 : targetArr.forEach(function(target) { optionArr.forEach(function(item) { var option = document.createElement("option") option.setAttribute("value", item.CODE_ID); option.innerText = item.CODE_NAME; target.append(option); }); }); 변경 소스 : var fragment = document.createDocumentFragment(); var option = document.createElement("option"); optionArr.forEach(function(item) { var cloneOption = option.cloneNode(); cloneOption.setAttribute("value", item.CODE_ID); cloneOption.innerText = item.CODE_NAME; fragment.append(cloneOption); }); targetArr.forEach(function(target) { target.append(fragment.cloneNode(true)); }); 이렇게 O(nm)으로 동작하던 기존 소스를 O(n)으로 변경하였고 더하여 직접 DOM을 조작하기 보다 documentFragment를 활용하였으니 더 빨라질 것으로 예상하였으나 더욱 느리게 나오더라구요. cloneNode가 문제인 건지... 이유를 모르겠습니다. 알려주시면 감사하겠습니다.

자바스크립트 forEach 와 async await 을 같이 사용하면 안되는건가요?

최근에 받은 코드 리뷰에서 forEach 와 async await 을 같이 사용할 경우 문제가 발생할 수 있다는 피드벡을 받았습니다. 코드를 돌려 보았을 때는 크게 문제 없어보이는데 어떤 문제가 있는지 알려주실수 있나요 ? 만약 다음 코드에서 forEach 를 사용하면 안된다면 어떤 문법을 사용해야 하는지도 알려주세요. 사용 가능한 for 문이 너무 많아서 혼란스러워요 ㅠㅠ

[SwiftUI]array에 값이 append 되질 않아요

코드 실행은 되는데 만든 plus버튼을 눌러서 AddFile함수를 실행시켜도 folders어레이에 아무 값이 추가 되질 않아요ㅠ AddFile함수를 잘못 작성한 것일까요? 코드는 전체 복붙해놨습니다 import SwiftUI struct Category: View { var body: some View { NavigationView { ScrollView { VStack { HStack { Text("Category") .font(.title) .padding(.horizontal) Spacer() Button { AddFile(title: "hello") } label: { Image(systemName: "plus") .font(.title2) .padding(.horizontal) } } Text("\(folders.count)") if folders.first != nil { ForEach(folders) { folder in ZStack { RoundedRectangle(cornerRadius: 15) .frame(width: 100, height: 100) .foregroundColor(.yellow) Text(folder.title) .font(.title3) .fontWeight(.bold) } } } else { Text("No folder") } } } } } func AddFile(title: String) { folders.append(Folder(title: title)) } } struct Folder: Identifiable { var id = UUID().uuidString var title: String } var folders: [Folder] = [ Folder(title: "hi"), Folder(title: "hello") ] struct Category_Previews: PreviewProvider { static var previews: some View { Category() } }