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From "Keith Wall (JIRA)" <j...@apache.org>
Subject [jira] [Created] (QPID-7185) ReplicatedEnvironmentFacadeTest.testReplicationGroupListenerHearsNodeRemoved fails sporadically on Apache CI
Date Tue, 05 Apr 2016 10:55:25 GMT
Keith Wall created QPID-7185:
--------------------------------

             Summary: ReplicatedEnvironmentFacadeTest.testReplicationGroupListenerHearsNodeRemoved
fails sporadically on Apache CI
                 Key: QPID-7185
                 URL: https://issues.apache.org/jira/browse/QPID-7185
             Project: Qpid
          Issue Type: Bug
          Components: Java Tests
            Reporter: Keith Wall
             Fix For: qpid-java-6.1


The test {{testReplicationGroupListenerHearsNodeRemoved }} failed in the following way on
the Apache CI host:

{noformat}
org.apache.qpid.server.store.StoreException: Exception on node removal from group
	at com.sleepycat.je.EnvironmentFailureException.unexpectedState(EnvironmentFailureException.java:426)
	at com.sleepycat.je.rep.util.ReplicationGroupAdmin.getException(ReplicationGroupAdmin.java:504)
	at com.sleepycat.je.rep.util.ReplicationGroupAdmin.doMessageExchange(ReplicationGroupAdmin.java:474)
	at com.sleepycat.je.rep.util.ReplicationGroupAdmin.removeMember(ReplicationGroupAdmin.java:245)
	at org.apache.qpid.server.store.berkeleydb.replication.ReplicatedEnvironmentFacade.removeNodeFromGroup(ReplicatedEnvironmentFacade.java:1284)
	at org.apache.qpid.server.store.berkeleydb.replication.ReplicatedEnvironmentFacadeTest.testReplicationGroupListenerHearsNodeRemoved(ReplicatedEnvironmentFacadeTest.java:377)
{noformat}

The underlying exception was as follows:

{noformat}
2016-04-03 23:19:00,667 ERROR [main] o.a.q.s.u.ServerScopedRuntimeException Exception on node
removal from group
com.sleepycat.je.EnvironmentFailureException: (JE 5.0.104) (JE 5.0.104) Transaction -20 cannot
execute write operations because this node is no longer a master UNEXPECTED_STATE: Unexpected
internal state, may have side effects.
	at com.sleepycat.je.EnvironmentFailureException.unexpectedState(EnvironmentFailureException.java:426)
~[je-5.0.104.jar:5.0.104]
	at com.sleepycat.je.rep.util.ReplicationGroupAdmin.getException(ReplicationGroupAdmin.java:504)
~[je-5.0.104.jar:5.0.104]
	at com.sleepycat.je.rep.util.ReplicationGroupAdmin.doMessageExchange(ReplicationGroupAdmin.java:474)
~[je-5.0.104.jar:5.0.104]
	at com.sleepycat.je.rep.util.ReplicationGroupAdmin.removeMember(ReplicationGroupAdmin.java:245)
~[je-5.0.104.jar:5.0.104]
	at org.apache.qpid.server.store.berkeleydb.replication.ReplicatedEnvironmentFacade.removeNodeFromGroup(ReplicatedEnvironmentFacade.java:1284)
~[classes/:na]
	at org.apache.qpid.server.store.berkeleydb.replication.ReplicatedEnvironmentFacadeTest.testReplicationGroupListenerHearsNodeRemoved(ReplicatedEnvironmentFacadeTest.java:377)
[test-classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_80]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_80]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
~[na:1.7.0_80]
	at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_80]
	at junit.framework.TestCase.runTest(TestCase.java:176) [junit-4.11.jar:na]
	at org.apache.qpid.test.utils.QpidTestCase.runTest(QpidTestCase.java:171) [qpid-test-utils-6.1.0-SNAPSHOT.jar:6.1.0-SNAPSHOT]
	at junit.framework.TestCase.runBare(TestCase.java:141) [junit-4.11.jar:na]
	at junit.framework.TestResult$1.protect(TestResult.java:122) [junit-4.11.jar:na]
	at junit.framework.TestResult.runProtected(TestResult.java:142) [junit-4.11.jar:na]
	at junit.framework.TestResult.run(TestResult.java:125) [junit-4.11.jar:na]
	at junit.framework.TestCase.run(TestCase.java:129) [junit-4.11.jar:na]
	at org.apache.qpid.test.utils.QpidTestCase.run(QpidTestCase.java:156) [qpid-test-utils-6.1.0-SNAPSHOT.jar:6.1.0-SNAPSHOT]
	at junit.framework.TestSuite.runTest(TestSuite.java:255) [junit-4.11.jar:na]
	at junit.framework.TestSuite.run(TestSuite.java:250) [junit-4.11.jar:na]
	at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:84) [junit-4.11.jar:na]
	at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:264) [surefire-junit4-2.17.jar:2.17]
	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153)
[surefire-junit4-2.17.jar:2.17]
	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:124) [surefire-junit4-2.17.jar:2.17]
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
[surefire-booter-2.17.jar:2.17]
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
[surefire-booter-2.17.jar:2.17]
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103) [surefire-booter-2.17.jar:2.17]
{noformat}

The node that was the target of the {{ReplicationGroupAdmin.removeMember}} call was at that
moment being restarted as majority had been lost.  This seems to have provoked an unexpected
exception from within JE.

The test is concerned with ensuring the listener fires correctly in response to changes in
group membership.  This test can avoid the possibility of a mastership loss simply by setting
designated primary to true.

As changing the consistency of a group whilst a production system is live would be an unusual
thing to do, this chances of this manifesting in production are small.  If it were to happen,
a node restart would be required to restore service.




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