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Posted to dev@qpid.apache.org by "Ken Giusti (JIRA)" <ji...@apache.org> on 2012/05/30 23:04:24 UTC
[jira] [Commented] (QPID-4031) Deadlock when destroying a broker
Link
[ https://issues.apache.org/jira/browse/QPID-4031?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13286054#comment-13286054 ]
Ken Giusti commented on QPID-4031:
----------------------------------
Here's a backtrace of the lockup:
Thread 3 (Thread 0x7f49b3bff700 (LWP 24447)):
#0 0x00000032ab60e34d in __lll_lock_wait () from /lib64/libpthread.so.0
#1 0x00000032ab609fb2 in _L_lock_910 () from /lib64/libpthread.so.0
#2 0x00000032ab609e4b in pthread_mutex_lock () from /lib64/libpthread.so.0
[attempts to take Link->lock]
#3 0x00007f49b4b91b19 in qpid::broker::Link::maintenanceVisit() () from /home/kgiusti/Desktop/work/qpid/github/build/dyna-route-q/src/.libs/libqpidbroker.so.2
#4 0x00007f49b4b94db1 in qpid::broker::LinkTimerTask::fire() () from /home/kgiusti/Desktop/work/qpid/github/build/dyna-route-q/src/.libs/libqpidbroker.so.2
[take timer->callbackLock]
#5 0x00007f49b46ecfe1 in qpid::sys::Timer::fire(boost::intrusive_ptr<qpid::sys::TimerTask>) () from /home/kgiusti/Desktop/work/qpid/github/build/dyna-route-q/src/.libs/libqpidcommon.so.2
#6 0x00007f49b46ee486 in qpid::sys::Timer::run() () from /home/kgiusti/Desktop/work/qpid/github/build/dyna-route-q/src/.libs/libqpidcommon.so.2
#7 0x00007f49b4611d4a in qpid::sys::(anonymous namespace)::runRunnable(void*) () from /home/kgiusti/Desktop/work/qpid/github/build/dyna-route-q/src/.libs/libqpidcommon.so.2
#8 0x00000032ab607d90 in start_thread () from /lib64/libpthread.so.0
#9 0x00000032ab2f0f5d in clone () from /lib64/libc.so.6
Thread 2 (Thread 0x7f49b337d700 (LWP 24448)):
#0 0x00000032ab60e34d in __lll_lock_wait () from /lib64/libpthread.so.0
#1 0x00000032ab609fb2 in _L_lock_910 () from /lib64/libpthread.so.0
#2 0x00000032ab609e4b in pthread_mutex_lock () from /lib64/libpthread.so.0
[attempts to take timer->callbackLock]
#3 0x00007f49b46ed202 in qpid::sys::TimerTask::cancel() () from /home/kgiusti/Desktop/work/qpid/github/build/dyna-route-q/src/.libs/libqpidcommon.so.2
[takes link->lock]
#4 0x00007f49b4b8f42e in qpid::broker::Link::destroy() () from /home/kgiusti/Desktop/work/qpid/github/build/dyna-route-q/src/.libs/libqpidbroker.so.2
#5 0x00007f49b4b4ebd8 in qpid::broker::Connection::doIoCallbacks() () from /home/kgiusti/Desktop/work/qpid/github/build/dyna-route-q/src/.libs/libqpidbroker.so.2
#6 0x00007f49b4b51526 in qpid::broker::Connection::doOutput() () from /home/kgiusti/Desktop/work/qpid/github/build/dyna-route-q/src/.libs/libqpidbroker.so.2
#7 0x00007f49b4b21a0d in qpid::amqp_0_10::Connection::canEncode() () from /home/kgiusti/Desktop/work/qpid/github/build/dyna-route-q/src/.libs/libqpidbroker.so.2
#8 0x00007f49b46e3b75 in qpid::sys::AsynchIOHandler::idle(qpid::sys::AsynchIO&) () from /home/kgiusti/Desktop/work/qpid/github/build/dyna-route-q/src/.libs/libqpidcommon.so.2
#9 0x00007f49b460f47d in qpid::sys::posix::AsynchIO::writeable(qpid::sys::DispatchHandle&) () from /home/kgiusti/Desktop/work/qpid/github/build/dyna-route-q/src/.libs/libqpidcommon.so.2
#10 0x00007f49b46e8796 in qpid::sys::DispatchHandle::processEvent(qpid::sys::Poller::EventType) () from /home/kgiusti/Desktop/work/qpid/github/build/dyna-route-q/src/.libs/libqpidcommon.so.2
#11 0x00007f49b461730f in qpid::sys::Poller::run() () from /home/kgiusti/Desktop/work/qpid/github/build/dyna-route-q/src/.libs/libqpidcommon.so.2
#12 0x00007f49b4611d4a in qpid::sys::(anonymous namespace)::runRunnable(void*) () from /home/kgiusti/Desktop/work/qpid/github/build/dyna-route-q/src/.libs/libqpidcommon.so.2
#13 0x00000032ab607d90 in start_thread () from /lib64/libpthread.so.0
#14 0x00000032ab2f0f5d in clone () from /lib64/libc.so.6
> Deadlock when destroying a broker Link
> --------------------------------------
>
> Key: QPID-4031
> URL: https://issues.apache.org/jira/browse/QPID-4031
> Project: Qpid
> Issue Type: Bug
> Components: C++ Broker
> Affects Versions: 0.16
> Reporter: Ken Giusti
> Assignee: Ken Giusti
> Fix For: 0.17
>
>
> Very unlikely, but if the Link's maintenance timer fires at the moment the Link is destroyed, a deadlock can occur.
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