Hello Team,

Below exception we saw in v8.1.1, but after upgrding to v8.4.2 thought it won't come but still we are seeing issue and there is no trace anyone reported on it. If anyone faced similar issue or any details can be more helpful.

FYI..

[   New I/O worker #1] [  STANDARD] [                    ] [                    ] (ion.service.SessionServiceImpl) ERROR   - Failed to accept incoming connection for the session '33477126032195586' com.pega.charlatan.utils.CharlatanException$SessionExpiredException: KeeperErrorCode = Session expired     at com.pega.charlatan.session.service.SessionServiceImpl.handleConnectRequest(SessionServiceImpl.java:129) ~[charlatan-server.jar:?]     at com.pega.charlatan.session.service.SessionServiceImpl.processRequest(SessionServiceImpl.java:84) ~[charlatan-server.jar:?]     at com.pega.charlatan.server.CharlatanNettyConnection.receiveMessage(CharlatanNettyConnection.java:78) ~[charlatan-server.jar:?]     at com.pega.charlatan.server.CharlatanNettyServer$CharlatanChannelHandler.processMessage(CharlatanNettyServer.java:213) ~[charlatan-server.jar:?]     at com.pega.charlatan.server.CharlatanNettyServer$CharlatanChannelHandler.messageReceived(CharlatanNettyServer.java:207) ~[charlatan-server.jar:?]     at org.jboss.netty.channel.SimpleChannelHandler.handleUpstream(SimpleChannelHandler.java:88) ~[netty-3.10.6.Final.jar:?]     at com.pega.charlatan.server.CharlatanNettyServer$CharlatanChannelHandler.handleUpstream(CharlatanNettyServer.java:200) ~[charlatan-server.jar:?]     at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:462) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:443) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:303) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108) ~[netty-3.10.6.Final.jar:?]     at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42) ~[netty-3.10.6.Final.jar:?]     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[?:1.8.0_172]     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[?:1.8.0_172]     at com.pega.dsm.dnode.util.PrpcRunnable$1.run(PrpcRunnable.java:59) ~[d-node.jar:?]     at com.pega.dsm.dnode.util.PrpcRunnable$1.run(PrpcRunnable.java:56) ~[d-node.jar:?]     at com.pega.dsm.dnode.util.PrpcRunnable.execute(PrpcRunnable.java:67) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.prpc.PrpcThreadFactory$PrpcThread.run(PrpcThreadFactory.java:124) ~[d-node.jar:?]