https://bz.apache.org/bugzilla/show_bug.cgi?id=65525
Bug ID: 65525 Summary: Exception in thread "http-nio-8080-ClientPoller" java.lang.NullPointerException Product: Tomcat 9 Version: unspecified Hardware: PC OS: Linux Status: NEW Severity: critical Priority: P2 Component: WebSocket Assignee: dev@tomcat.apache.org Reporter: juhigupta...@gmail.com Target Milestone: ----- I have a JAVA application running on spring boot 2.3.2 following is the defination defined in pom <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.3.2.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> from the following link https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-tomcat/2.3.2.RELEASE I can see it uses 9.0.x Tomcat I have started to notice that the application has started to throw following exception: Exception in thread "http-nio-8080-ClientPoller" java.lang.NullPointerException at org.apache.tomcat.util.net.NioEndpoint$Poller.events(NioEndpoint.java:613) at org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.java:729) at java.base/java.lang.Thread.run(Thread.java:832) and after this exception all the rest calls get stuck and breaks the application. Not sure what is causing it and how to mitigate it. Getting this error in prod and not sure how to resolve it, any hep is appreciated. -- You are receiving this mail because: You are the assignee for the bug. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org For additional commands, e-mail: dev-h...@tomcat.apache.org