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From "Alex Rudyy (JIRA)" <j...@apache.org>
Subject [jira] [Created] (QPID-8222) [JMS AMQP 0-x][AMQP 0-8..0-91] Transaction commit/rollback or recover can hang when failover is in progress
Date Thu, 02 Aug 2018 11:48:00 GMT
Alex Rudyy created QPID-8222:
--------------------------------

             Summary: [JMS AMQP 0-x][AMQP 0-8..0-91] Transaction commit/rollback or recover
can hang when failover is in progress
                 Key: QPID-8222
                 URL: https://issues.apache.org/jira/browse/QPID-8222
             Project: Qpid
          Issue Type: Bug
          Components: JMS AMQP 0-x
    Affects Versions: qpid-java-client-0-x-6.3.2, qpid-java-client-0-x-6.3.1, qpid-java-6.1.5,
qpid-java-client-0-x-6.3.0, qpid-java-6.1.4, qpid-java-6.0.8, qpid-java-6.1.3, qpid-java-6.0.7,
qpid-java-6.1.2, qpid-java-6.1.1, qpid-java-6.0.6, qpid-java-6.1, qpid-java-6.0.5, qpid-java-6.0.4,
qpid-java-6.0.3, qpid-java-6.0.2, qpid-java-6.0.1, qpid-java-6.0, qpid-java-6.1.6
            Reporter: Alex Rudyy
             Fix For: qpid-java-client-0-x-6.3.3


JMS transaction commit/rollback or recover can hang when connectivity is lost and failover
is triggered to restore the connection. When commit/rollback/recover are invoked after restoring
the connectivity and before failover finishes resubscribing of existing sessions, the syncing
of dispatcher queue can hang due to race with adding the signal message into the queue from
session operation and cleaning the queue by failover. Here is a dump of hang commit operation:
{noformat}
"main" #1 prio=5 os_prio=0 tid=0x000000000241c000 nid=0x2e18 waiting on condition [0x0000000002a9f000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x000000076d9f4c70> (a java.util.concurrent.CountDownLatch$Sync)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:997)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1304)
	at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:231)
	at org.apache.qpid.client.AMQSession.syncDispatchQueue(AMQSession.java:2343)
	at org.apache.qpid.client.AMQSession.rollback(AMQSession.java:1984)
	- locked <0x000000076d67e5f8> (a java.lang.Object)
	at org.apache.qpid.client.AMQSession.commit(AMQSession.java:922)
	at org.apache.qpid.test.Test.main(Test.java:40)
{noformat}

The defect was introduced as part of changes committed against QPID-3521. I do not see any
sensible work around for the issue.



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