Hi Team,

We are frequently observing high thread counts and jvm's slowness and could find below mentioned exceptions in the logs.

PRPC: 8.4.4 | Tomcat : 8.5.13

Any suggestions to resolve the same ? Thanks in advance.

1) SEVERE: Error reading request, ignored

java.lang.NullPointerException: Inflater has been closed

at java.util.zip.Inflater.ensureOpen(Inflater.java:389)

at java.util.zip.Inflater.inflate(Inflater.java:257)

at org.apache.tomcat.websocket.PerMessageDeflate.getMoreData(PerMessageDeflate.java:201)

at org.apache.tomcat.websocket.WsFrameBase.processDataText(WsFrameBase.java:401)

at org.apache.tomcat.websocket.WsFrameBase.processData(WsFrameBase.java:288)

at org.apache.tomcat.websocket.WsFrameBase.processInputBuffer(WsFrameBase.java:127)

at org.apache.tomcat.websocket.server.WsFrameServer.onDataAvailable(WsFrameServer.java:73)

at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.upgradeDispatch(WsHttpUpgradeHandler.java:148)

at org.apache.coyote.http11.upgrade.UpgradeProcessorInternal.dispatch(UpgradeProcessorInternal.java:54)

at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:53)

at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861)

at org.apache.tomcat.util.net.Nio2Endpoint$SocketProcessor.doRun(Nio2Endpoint.java:1697)

at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)

at org.apache.tomcat.util.net.AbstractEndpoint.processSocket(AbstractEndpoint.java:934)

at org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$4.completed(Nio2Endpoint.java:626)

at org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$4.completed(Nio2Endpoint.java:604)

at org.apache.tomcat.util.net.SecureNio2Channel$1.completed(SecureNio2Channel.java:877)

at org.apache.tomcat.util.net.SecureNio2Channel$1.completed(SecureNio2Channel.java:810)

at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)

at sun.nio.ch.Invoker$2.run(Invoker.java:218)

at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.lang.Thread.run(Thread.java:748)

2) Feb 22, 2022 9:08:56 AM org.apache.tomcat.websocket.BackgroundProcessManager process

SEVERE: A background process failed

java.lang.NullPointerException