Hello Experts,

We could find the below mentioned exceptions clogging the logs, followed by high thread count and then JVM becoming unresponsive. This is happening very frequently and impacting our production environment.

Any suggestions please ?

2021-08-12 18:18:27,770 GMT*8*EXCP0001*0*0*va22pwppeg310_csx3p*NA*NA*NA*NA*NA*NA*NA*?*-1**2264*NA*NA*org.atmosphere.container.JSR356Endpoint*NA*NA*NA*NA*NA****NA*NA*NA*NA*NA*NA*NA*NA*[MSG][][STACK][java.lang.NullPointerException<CR><CR>                at org.atmosphere.websocket.WebSocket.shiftAttributes(WebSocket.java:127)<CR><CR>          at org.atmosphere.websocket.DefaultWebSocketProcessor.open(DefaultWebSocketProcessor.java:271)<CR><CR>                at org.atmosphere.container.JSR356Endpoint.onOpen(JSR356Endpoint.java:252)<CR><CR>      at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.init(WsHttpUpgradeHandler.java:133)<CR><CR>                at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:907)<CR><CR>                at org.apache.tomcat.util.net.Nio2Endpoint$SocketProcessor.doRun(Nio2Endpoint.java:1697)<CR><CR>                at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)<CR><CR>             at org.apache.tomcat.util.net.AbstractEndpoint.processSocket(AbstractEndpoint.java:934)<CR><CR>        at org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$4.completed(Nio2Endpoint.java:626)<CR><CR>                at org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$4.completed(Nio2Endpoint.java:604)<CR><CR>                at org.apache.tomcat.util.net.SecureNio2Channel$1.completed(SecureNio2Channel.java:877)<CR><CR>                at org.apache.tomcat.util.net.SecureNio2Channel$1.completed(SecureNio2Channel.java:810)<CR><CR>                at sun.nio.ch.Invoker.invokeUnchecked(Unknown Source)<CR><CR>     at sun.nio.ch.Invoker$2.run(Unknown Source)<CR><CR>  at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(Unknown Source)<CR><CR>              at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)<CR><CR>           at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)<CR><CR>        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)<CR><CR>      at java.lang.Thread.run(Unknown Source)<CR><CR>]*