Hi!
We are running Tomcat 7.0.68 with SimpleTcpCluster with two nodes on
different hosts.
server.xml:
[..]
<Engine [..]>
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" />
[..]
</Engine>
[..]
Everything works fine, except the messages below in catalina.out.
The problem seems to occur, if a session is modified and invalidated
during the same request (which is quite common imho). The invalidation
is replicated faster than the attribute deltas, so the second node
processes the invalidation and cannot handle the session-attribute
modification afterwards. It would be no problem to forget about the
modifications, because the session is invalid.
Just the reported exception is quite misleading and the not really
helpful for monitoring the logs.
Any suggestions? Did we miss something?
Thanks in advance,
Knut
--- catalina.out ---
May 13, 2016 7:31:14 PM org.apache.catalina.ha.session.DeltaManager
messageReceived
FINE: Manager [localhost#/xxx]: Received SessionMessage of
type=(SESSION-EXPIRED) from
[org.apache.catalina.tribes.membership.MemberImpl[tcp://{10, x, x,
x}:4000,{10, x, x, x},4000, alive=943161, securePort=-1, UDP Port=-1,
id={25 ... -60 }, payload={}, command={}, domain={}, ]]
May 13, 2016 7:31:14 PM org.apache.catalina.ha.session.DeltaManager
handleSESSION_EXPIRED
FINE: Manager [localhost#/xxx]: received session
[012F517D98B33DC5EB3F8CD488558BED] expired.
May 13, 2016 7:31:14 PM org.apache.catalina.ha.tcp.SimpleTcpCluster
messageReceived
FINE: Assuming clocks are synched: Replication for
E43557F686529DC080B27BBB8FF52E6E-1463160674477 took=1 ms.
May 13, 2016 7:31:14 PM org.apache.catalina.ha.session.DeltaManager
messageReceived
FINE: Manager [localhost#/xxx]: Received SessionMessage of
type=(SESSION-MODIFIED) from
[org.apache.catalina.tribes.membership.MemberImpl[tcp://{10, x, x,
x}:4000,{10, x, x, x},4000, alive=943161, securePort=-1, UDP Port=-1,
id={25 ... -60 }, payload={}, command={}, domain={}, ]]
May 13, 2016 7:31:14 PM org.apache.catalina.ha.session.DeltaManager
handleSESSION_CREATED
FINE: Manager [localhost#/xxx]: received session
[E43557F686529DC080B27BBB8FF52E6E] created.
May 13, 2016 7:31:14 PM org.apache.catalina.ha.session.DeltaRequest execute
FINER: Session.setAttribute('xxx', 'yyy')
May 13, 2016 7:31:14 PM org.apache.catalina.ha.session.DeltaManager
messageReceived
SEVERE: Manager [localhost#/xxx]: Unable to receive message through TCP
channel
java.lang.IllegalStateException: setAttribute: Session
[012F517D98B33DC5EB3F8CD488558BED] has already been invalidated
at
org.apache.catalina.session.StandardSession.setAttribute(StandardSession.java:1447)
at
org.apache.catalina.ha.session.DeltaSession.setAttribute(DeltaSession.java:697)
at
org.apache.catalina.ha.session.DeltaRequest.execute(DeltaRequest.java:179)
at
org.apache.catalina.ha.session.DeltaManager.handleSESSION_DELTA(DeltaManager.java:1221)
at
org.apache.catalina.ha.session.DeltaManager.messageReceived(DeltaManager.java:1167)
at
org.apache.catalina.ha.session.DeltaManager.messageDataReceived(DeltaManager.java:918)
at
org.apache.catalina.ha.session.ClusterSessionListener.messageReceived(ClusterSessionListener.java:91)
at
org.apache.catalina.ha.tcp.SimpleTcpCluster.messageReceived(SimpleTcpCluster.java:937)
at
org.apache.catalina.ha.tcp.SimpleTcpCluster.messageReceived(SimpleTcpCluster.java:918)
at
org.apache.catalina.tribes.group.GroupChannel.messageReceived(GroupChannel.java:278)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.messageReceived(ChannelInterceptorBase.java:82)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.messageReceived(ChannelInterceptorBase.java:82)
at
org.apache.catalina.tribes.group.interceptors.TcpFailureDetector.messageReceived(TcpFailureDetector.java:117)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.messageReceived(ChannelInterceptorBase.java:82)
at
org.apache.catalina.tribes.group.ChannelCoordinator.messageReceived(ChannelCoordinator.java:252)
at
org.apache.catalina.tribes.transport.ReceiverBase.messageDataReceived(ReceiverBase.java:287)
at
org.apache.catalina.tribes.transport.nio.NioReplicationTask.drainChannel(NioReplicationTask.java:210)
at
org.apache.catalina.tribes.transport.nio.NioReplicationTask.run(NioReplicationTask.java:99)
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)
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