High CPU usage and performance issues in RHDG 8.3.1

Issue

• Getting below exception in RHDG 8.3.1 and facing performance issues when number of user requests increase.

Exception 1

ERROR (timeout-thread--p4-t1) [org.infinispan.interceptors.impl.InvocationContextInterceptor] ISPN000136: Error executing command PutKeyValueCommand on Cache 'TEST_CACHE', writing keys [WrappedByteArray[03\>0F\2\4\A\A\S\G\J\7\0\7\2\B\2\Z\8 (18 bytes)]] org.infinispan.util.concurrent.TimeoutException: ISPN000476: Timed out waiting for responses for request 1080864 from node1
        at org.infinispan.remoting.transport.impl.MultiTargetRequest.onTimeout(MultiTargetRequest.java:170)
        at org.infinispan.remoting.transport.AbstractRequest.call(AbstractRequest.java:87)
        at org.infinispan.remoting.transport.AbstractRequest.call(AbstractRequest.java:22)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base/java.lang.Thread.run(Thread.java:833)

Exception 2

ERROR (non-blocking-thread--p2-t87) [org.infinispan.server.hotrod.BaseRequestProcessor] ISPN005003: Exception reported org.infinispan.commons.IllegalLifecycleStateException: ISPN000324: Cache 'TEST_CACHE' is in 'STOPPING' state and this is an invocation not belonging to an on-going transaction, so it does not accept new invocations. Either restart it or recreate the cache container.