Deadlock between "_lock" (in AMQSession#DisptcherThread) and
"_messageDeliveryLock" (in AMQSession.java)
--------------------------------------------------------------------------------------------------------
Key: QPID-3216
URL: https://issues.apache.org/jira/browse/QPID-3216
Project: Qpid
Issue Type: Bug
Components: Java Client
Affects Versions: 0.10
Reporter: Rajith Attapattu
Assignee: Rajith Attapattu
Fix For: 0.11
As per the following thread dump you can clearly see the deadlock between
"_lock" (in AMQSession#DisptcherThread) and "_messageDeliveryLock" (in
AMQSession.java)
This is another regression and I am working to identify the rev that caused it
and possibly understand the circumstances surrounding the change.
dispatcher thread already obtained "_lock" in dispatchMessage method.
dispatcher thread waiting to take "_messageDeliveryLock" in the same method.
main thread has already obtained "_messageDeliveryLock" in AMQSession.close
method.
main thread waiting to take "_lock" in DispatcherThread.rejectPending method.
Found one Java-level deadlock:
=============================
"Dispatcher-Channel-0":
waiting to lock monitor 0x0000002ac1e6f0b8 (object 0x0000002a9f040448, a
java.lang.Object),
which is held by "main"
"main":
waiting to lock monitor 0x0000002ac1e6f010 (object 0x0000002a9f03ba40, a
java.lang.Object),
which is held by "Dispatcher-Channel-0"
Java stack information for the threads listed above:
===================================================
"Dispatcher-Channel-0":
at
org.apache.qpid.client.AMQSession$Dispatcher.dispatchMessage(AMQSession.java:3315)
- waiting to lock<0x0000002a9f040448> (a java.lang.Object)
- locked<0x0000002a9f03ba40> (a java.lang.Object)
at
org.apache.qpid.client.AMQSession$Dispatcher.access$900(AMQSession.java:3096)
at org.apache.qpid.client.AMQSession.dispatch(AMQSession.java:3089)
at
org.apache.qpid.client.message.UnprocessedMessage.dispatch(UnprocessedMessage.java:55)
at org.apache.qpid.client.AMQSession$Dispatcher.run(AMQSession.java:3243)
at java.lang.Thread.run(Thread.java:619)
"main":
at
org.apache.qpid.client.AMQSession$Dispatcher.rejectPending(AMQSession.java:3122)
- waiting to lock<0x0000002a9f03ba40> (a java.lang.Object)
at
org.apache.qpid.client.AMQSession.confirmConsumerCancelled(AMQSession.java:897)
at
org.apache.qpid.client.BasicMessageConsumer_0_10.sendCancel(BasicMessageConsumer_0_10.java:189)
at
org.apache.qpid.client.BasicMessageConsumer.close(BasicMessageConsumer.java:573)
- locked<0x0000002a9ef30aa0> (a java.lang.Object)
at org.apache.qpid.client.AMQSession.closeConsumers(AMQSession.java:2464)
at
org.apache.qpid.client.AMQSession.closeProducersAndConsumers(AMQSession.java:2514)
at org.apache.qpid.client.AMQSession.close(AMQSession.java:731)
- locked<0x0000002a9f040448> (a java.lang.Object)
- locked<0x0000002a9ef30aa0> (a java.lang.Object)
at org.apache.qpid.client.AMQSession.close(AMQSession.java:708)
at
org.apache.qpid.client.AMQConnection.closeAllSessions(AMQConnection.java:1003)
at org.apache.qpid.client.AMQConnection.doClose(AMQConnection.java:897)
- locked<0x0000002a9ef30aa0> (a java.lang.Object)
- locked<0x0000002a9ef30ab0> (a java.lang.Object)
at org.apache.qpid.client.AMQConnection.doClose(AMQConnection.java:886)
- locked<0x0000002a9f040448> (a java.lang.Object)
- locked<0x0000002a9ef30ab0> (a java.lang.Object)
at org.apache.qpid.client.AMQConnection.close(AMQConnection.java:870)
at org.apache.qpid.client.AMQConnection.close(AMQConnection.java:861)
at org.apache.qpid.client.AMQConnection.close(AMQConnection.java:856)
at
org.apache.qpid.test.utils.QpidBrokerTestCase.tearDown(QpidBrokerTestCase.java:1118)
at junit.framework.TestCase.runBare(TestCase.java:130)
at
org.apache.qpid.test.utils.QpidBrokerTestCase.runBare(QpidBrokerTestCase.java:234)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at org.apache.qpid.test.utils.QpidTestCase.run(QpidTestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:297)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:672)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:546)
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