Possible slave failure after upgrade

What steps will reproduce the problem?
1. Upgrade tungsten to a recent release
- stop the slave
- upgrade it to a newer release (while receiving some load on the master)
- restart the slave using new release binaries

What is the expected output? 
Slave should goes online

What do you see instead?
Slave goes offline:error
Log shows the following error message :

INFO | jvm 1 | 2011/06/03 14:45:06 | 2011-06-03 14:45:06,564 ERROR 
replicator.management.OpenReplicatorManager Received error notification, 
shutting down services: Stage task failed: remote-to-thl 
INFO | jvm 1 | 2011/06/03 14:45:06 | java.lang.NullPointerException 
INFO | jvm 1 | 2011/06/03 14:45:06 | at 
com.continuent.tungsten.enterprise.replicator.thl.serializer.ProtobufSerializer.
serializeEvent(ProtobufSerializer.java:197)
INFO | jvm 1 | 2011/06/03 14:45:06 | at 
com.continuent.tungsten.enterprise.replicator.thl.LogEventReplWriter.write(LogEv
entReplWriter.java:75) 
INFO | jvm 1 | 2011/06/03 14:45:06 | at 
com.continuent.tungsten.enterprise.replicator.thl.DiskLog.store(DiskLog.java:586
)
INFO | jvm 1 | 2011/06/03 14:45:06 | at 
com.continuent.tungsten.enterprise.replicator.thl.DiskTHLStorage.store(DiskTHLSt
orage.java:267) 
INFO | jvm 1 | 2011/06/03 14:45:06 | at 
com.continuent.tungsten.replicator.thl.THL.storeEvent(THL.java:424) 
INFO | jvm 1 | 2011/06/03 14:45:06 | at 
com.continuent.tungsten.replicator.thl.THLStoreAdapter.apply(THLStoreAdapter.jav
a:242) 
INFO | jvm 1 | 2011/06/03 14:45:06 | at 
com.continuent.tungsten.replicator.pipeline.SingleThreadStageTask.runTask(Single
ThreadStageTask.java:375) 
INFO | jvm 1 | 2011/06/03 14:45:06 | at 
com.continuent.tungsten.replicator.pipeline.SingleThreadStageTask.run(SingleThre
adStageTask.java:119) 

See http://forge.continuent.org/jira/browse/TUC-376
Original issue reported on code.google.com by Steph.Giron on 6 Jun 2011 at 11:54
zkfan / tungsten-replicator

Possible slave failure after upgrade #95
