I'm using a cluster with the DeltaManager between two servers on Tomcat
9.0.11. When I restart my "A" server, I sometimes see the error below.
Peaking at the code in DeltaManager it appears that there is a problem
in the serialized data stream when receiving all of the session data
from the "B" server. Any ideas what could be causing this? It seems like
that if there was something in a Session object that was not
Serializable it would not even make it over the wire. Perhaps if
something in a session did not serialize properly?
(From the code, it looks like all the sessions in the message after the
error are lost, so this is kind of important.)
07-Sep-2018 16:09:53.220 SEVERE
[Tribes-Task-Receiver[Catalina-Channel]-6]
org.apache.catalina.ha.session.DeltaManager.deserializeSessions
IOException while loading persisted sessions:
[java.io.StreamCorruptedException: invalid type code: 00]
java.io.StreamCorruptedException: invalid type code: 00
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1381)
at java.io.ObjectInputStream.skipCustomData(ObjectInputStream.java:1984)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1946)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353)
at
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373)
at
org.apache.catalina.ha.session.DeltaSession.doReadObject(DeltaSession.java:748)
at
org.apache.catalina.ha.session.DeltaSession.readObjectData(DeltaSession.java:569)
at
org.apache.catalina.ha.session.DeltaManager.deserializeSessions(DeltaManager.java:613)
at
org.apache.catalina.ha.session.DeltaManager.handleALL_SESSION_DATA(DeltaManager.java:1323)
at
org.apache.catalina.ha.session.DeltaManager.messageReceived(DeltaManager.java:1162)
at
org.apache.catalina.ha.session.DeltaManager.messageDataReceived(DeltaManager.java:917)
at
org.apache.catalina.ha.session.ClusterSessionListener.messageReceived(ClusterSessionListener.java:77)
at
org.apache.catalina.ha.tcp.SimpleTcpCluster.messageReceived(SimpleTcpCluster.java:788)
at
org.apache.catalina.ha.tcp.SimpleTcpCluster.messageReceived(SimpleTcpCluster.java:771)
at
org.apache.catalina.tribes.group.GroupChannel.messageReceived(GroupChannel.java:324)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.messageReceived(ChannelInterceptorBase.java:91)
at
org.apache.catalina.tribes.group.interceptors.TcpPingInterceptor.messageReceived(TcpPingInterceptor.java:175)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.messageReceived(ChannelInterceptorBase.java:91)
at
org.apache.catalina.tribes.group.interceptors.TcpFailureDetector.messageReceived(TcpFailureDetector.java:116)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.messageReceived(ChannelInterceptorBase.java:91)
at
org.apache.catalina.tribes.group.interceptors.StaticMembershipInterceptor.messageReceived(StaticMembershipInterceptor.java:96)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.messageReceived(ChannelInterceptorBase.java:91)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.messageReceived(ChannelInterceptorBase.java:91)
at
org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor.messageReceived(ThroughputInterceptor.java:86)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.messageReceived(ChannelInterceptorBase.java:91)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.messageReceived(ChannelInterceptorBase.java:91)
at
org.apache.catalina.tribes.group.ChannelCoordinator.messageReceived(ChannelCoordinator.java:274)
at
org.apache.catalina.tribes.transport.ReceiverBase.messageDataReceived(ReceiverBase.java:261)
at
org.apache.catalina.tribes.transport.nio.NioReplicationTask.drainChannel(NioReplicationTask.java:213)
at
org.apache.catalina.tribes.transport.nio.NioReplicationTask.run(NioReplicationTask.java:101)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
--
Mitch
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