[ http://jira.jboss.com/jira/browse/JGRP-416?page=all ] Jerry Gauthier updated JGRP-416: -------------------------------- Description: When I simulate a cluster failure and restart using a Multiplexer channel, the merge process fails in JGroups with an UnsupportedOperationException in Multiplexer.mergeServiceState(). The stack trace is as follows. ERROR [org.jgroups.mux.Multiplexer] problems handling merge view java.lang.UnsupportedOperationException at org.jgroups.util.UnmodifiableVector.retainAll(UnmodifiableVector.java:158) at org.jgroups.mux.Multiplexer.mergeServiceState(Multiplexer.java:867) at org.jgroups.mux.Multiplexer.handleMergeView(Multiplexer.java:812) at org.jgroups.mux.Multiplexer.access$200(Multiplexer.java:21) at org.jgroups.mux.Multiplexer$1.run(Multiplexer.java:287) I looked at the relevant JGroups code and it appears that JGroups uses a MergeView object that always returns an UnmodifiableVector when MergeView.getMembers() is invoked. The Multiplexer.mergeServiceState() method invokes MergeView.getMembers() followed by UnmodifiableVector.retainAll(), causing the exception to occur. This problem can be replicated by executing DRMTestCase in JBossAS 5.0. The error occurs in DRMTestCase.testIsMasterReplica(). was: When I simulate a cluster failure and restart using a Multiplexer channel, the merge process fails in JGroups with an UnsupportedOperationException in Multiplexer.mergeServiceState(). The stack trace is as follows. ERROR [org.jgroups.mux.Multiplexer] problems handling merge view java.lang.UnsupportedOperationException at org.jgroups.util.UnmodifiableVector.retainAll(UnmodifiableVector.java:158) at org.jgroups.mux.Multiplexer.mergeServiceState(Multiplexer.java:867) at org.jgroups.mux.Multiplexer.handleMergeView(Multiplexer.java:812) at org.jgroups.mux.Multiplexer.access$200(Multiplexer.java:21) at org.jgroups.mux.Multiplexer$1.run(Multiplexer.java:287) I looked at the relevant JGroups code and it appears that JGroups uses a MergeView object that always returns an UnmodifiableVector when MergeView.getMembers() is invoked. The Multiplexer.mergeServiceState() method invokes MergeView.getMembers() followed by UnmodifiableVector(.retainAll(), causing the exception to occur. This problem can be replicated by executing DRMTestCase in JBossAS 5.0. The error occurs in DRMTestCase.isMasterReplica(). -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira

[ http://jira.jboss.com/jira/browse/JGRP-416?page=comments#action_12352885 ] Vladimir Blagojevic commented on JGRP-416: ------------------------------------------ Fixed on 2.4.1 branch, affected files: Multiplexer.java 1.35.2.4 -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira

[ http://jira.jboss.com/jira/browse/JGRP-416?page=comments#action_12355816 ] Vladimir Blagojevic commented on JGRP-416: ------------------------------------------ Not resolving yet since test fails if STREAMING_STATE_TRANSFER is used. Investigating... -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira