errors occurred in catalina.out

[Dhaval Jaiswal <dh...@via.com>]

Set up the cluster of the session replication and it was working fine.
However showing following error in the catalina.out. Sometime occurring
weird behavior.

Tomcat version: Apache Tomcat/6.0.16


(1)
WARNING: IOException in replication worker, unable to drain channel.
Probable cause: Keep alive socket closed[Connection reset by peer].

 >> For above warning i have checked forum and as suggested we do have
keepAliveCount.

(2)

Mar 8, 2013 4:49:34 PM
org.apache.catalina.tribes.group.interceptors.TcpFailureDetector
memberDisappeared
INFO: Received
memberDisappeared[org.apache.catalina.tribes.membership.MemberImpl[tcp://{-64,
-88, 3, 12}:4000,{-64, -88, 3, 12},4000, alive=45882882,id={-70 -12 103 -20
66 -83 68 53 -74 -59 -107 0 -18 -70 33 65 }, payload={}, command={},
domain={}, ]] message. Will verify.
Mar 8, 2013 4:49:34 PM
org.apache.catalina.tribes.group.interceptors.TcpFailureDetector
memberDisappeared
INFO: Verification complete. Member still
alive[org.apache.catalina.tribes.membership.MemberImpl[tcp://{-64, -88, 3,
12}:4000,{-64, -88, 3, 12},4000, alive=45882882,id={-70 -12 103 -20 66 -83
68 53 -74 -59 -107 0 -18 -70 33 65 }, payload={}, command={}, domain={}, ]]
Mar 8, 2013 4:49:34 PM
org.apache.catalina.tribes.tipis.AbstractReplicatedMap get
Operation has timed out(60000 ms.).


(3)
SEVERE: Unable to replicate out data for a LazyReplicatedMap.get operation
java.lang.NullPointerException
        at
org.apache.catalina.tribes.tipis.AbstractReplicatedMap.get(AbstractReplicatedMap.java:850)
        at
org.apache.catalina.session.ManagerBase.findSession(ManagerBase.java:862)
        at
org.apache.catalina.connector.Request.doGetSession(Request.java:2283)
        at
org.apache.catalina.connector.Request.getSessionInternal(Request.java:2220)
        at
org.apache.catalina.ha.session.JvmRouteBinderValve.handlePossibleTurnover(JvmRouteBinderValve.java:22

(4)
SEVERE: An exception or error occurred in the container during the request
processing


(5)
Mar 8, 2013 11:26:32 PM org.apache.catalina.ha.session.DeltaSession
writeObject
SEVERE: Cannot serialize session attribute CURRENT_USER for session
61CA81CF075D08855B143814C53BF136.t7
java.io.NotSerializableException:





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