[jboss-jira] [JBoss JIRA] Created: (JGRP-418) MuxChannel.getState() always returns false with StreamingStateTransfer protocol
MuxChannel.getState() always returns false with StreamingStateTransfer protocol
-------------------------------------------------------------------------------
Key: JGRP-418
URL: http://jira.jboss.com/jira/browse/JGRP-418
Project: JGroups
Issue Type: Bug
Affects Versions: 2.4.1
Reporter: Jerry Gauthier
Assigned To: Vladimir Blagojevic
When I execute DRMTestCase.testIsMasterReplica() in JBossAS 5.0 using the
StreamingStateTransfer protocol, MuxChannel.getState() always returns false. This method
is invoked from ClusterPartition.fetchState(); it returns false even though debugging the
other node in a two node cluster shows that the state has been retrieved. If I use the
StateTransfer protocol instead, the transfer is successful.
I started debugging this issue and determined that ClusterPartition never successfully
retrieves state from the multiplexer channel when using StreamingStateTransfer. It's
possible that the problem lies in ClusterPartition but this can't be determined until
it's understood why getState() is returning false.
This problem can be replicated as follows.
1) Ensure that you're using the latest JBossAS 5.0.0 HEAD cluster and
testsuite\cluster code as I made recent changes in this area.
2) Modify
..\cluster\output\resources\jgroups-multiplexer.sar\META-INF\multiplexer-stacks.xml.
Change the "tunnel" stack to use StreamingStateTransfer instead of
StateTransfer. This is the stack used by the test in DRMTestCase.testIsMasterReplica().
3) Running the test should show the following result.
<error message="Initial serviceState transfer failed: Channel.getState()
returned false"
type="java.lang.IllegalStateException">java.lang.IllegalStateException:
Initial serviceState transfer failed: Channel.getState() returned false
at org.jboss.ha.framework.server.ClusterPartition.fetchState(ClusterPartition.java:511)
at
org.jboss.ha.framework.server.ClusterPartition.startService(ClusterPartition.java:335)
at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
at org.jboss.system.ServiceMBeanSupport.start(ServiceMBeanSupport.java:196)
at org.jboss.test.cluster.test.DRMTestCase.testIsMasterReplica(DRMTestCase.java:686)
at junit.extensions.TestDecorator.basicRun(TestDecorator.java:22)
at junit.extensions.TestSetup$1.protect(TestSetup.java:19)
at junit.extensions.TestSetup.run(TestSetup.java:23)
</error>
4) Note: DRMTestCase.testIsMasterReplica() won't execute successfully with the
StateTransfer protocol until JGRP-416 is resolved. This issue causes JGroups to issue
UnsupportedOperationException for UnmodifiableVector during the merge process in the test
case. I've patched the problem in JGroups locally and confirmed that the test does
run successfully for StateTransfer after this issue is resolved. It's not necessary
to patch JGRP-416 to investigate MuxChannel.getState() as the state problem occurs before
the UnmodifiableVector problem.
--
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