OutOfMemoryError occurs in java thread, how to deal with it

php editor Yuzai answers for you: When an OutOfMemoryError occurs in a java thread, it is usually caused by a memory leak or excessive memory consumption. Solutions include optimizing code logic, checking whether there are unclosed resources, adjusting JVM parameters, etc. In addition, you can use tools to check memory usage and locate the problem. Through these methods, the OutOfMemoryError problem in the Java thread can be effectively handled and the stable operation of the program can be ensured.

Question content

ERROR 1 --- [io-8080-exec-10] o.a.c.c.C. [. [. [/] . [dispatcherServlet]: Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception

org.springframework.security.web.firewall.RequestRejectedException: The request was rejected because the URL contained a potentially malicious String ";"
        at org.springframework.security.web.firewall. StrictHttpFirewall.rejectedBlocklistedUrls(StrictHttpFirewall.java:535) ~[spring-security-web-5.7.3.jar!/:5.7.3] 
        at org.springframework.security.web.firewall.StrictHttpFirewall.getFirewalledRequest(StrictHttpFirewall.java:505) ~[spring-security-web-5.7.3.jar!/:5.7.3] 
        at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:206) ~[spring-security-web-5.7.3.jar!/:5.7.3]
        at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:186) ~[spring-security-web-5.7.3.jar!/:5.7.3]
        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:354) ~[spring-web-5.3.23.jar!/:5.3.23] 
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:267) ~[spring-web-5.3.23.jar!/:5.3.23] 
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.23.jar!/:5.3.23] 
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.23.jar!/:5.3.23] 
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.23.jar!/:5.3.23] 
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.23.jar!/:5.3.23] 
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.23.jar!/:5.3.23] 
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.23.jar!/:5.3.23] 
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.catalina.authenticator. AuthenticatorBase.invoke(AuthenticatorBase.java:541) ~[tomcat-embed-core-9.0.65.jar!/:na]
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.catalina.connector. CoyoteAdapter.service(CoyoteAdapter.java:360) ~[tomcat-embed-core-9.0.65.jar!/:na]
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1789) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.65.jar!/:na]
        at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.65.jar!/:na] 
        at java.base/java.lang.Thread.run(Thread.java:840) ~[na:na]


Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "ClientThread";


Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "WebSocket background processing";

I debugged the entire application and used logging methods to identify but couldn't resolve it.

Workaround

Handling this type of error depends on context and specific application requirements. Here are some general strategies you can consider:

1. Increase heap size:

1. Analyze memory usage: Use tools like VisualVM, YourKit, and more. Make the thread stupid and check where the leak is.

2. Optimizing data structures and algorithms

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