Deadlock between ManagementBroker::userLock and LinkRegistry::lock
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Key: QPID-1725
URL: https://issues.apache.org/jira/browse/QPID-1725
Project: Qpid
Issue Type: Bug
Components: C++ Broker
Reporter: Gordon Sim
Priority: Blocker
Fix For: M5
Dispatching a management method holds the userLock in ManagementBroker; it may
then require the lock in the LinkRegistry if it is to declare a link or bridge.
Linkregistry::notifyConnection() firsttakes the Linkregistry lock, then as part
of establishing the connection it raises a management event which requires the
managementBrokers userLock.
Thread 5 (Thread -1208362080 (LWP 28312)):
#0 0x45b8b410 in __kernel_vsyscall ()
#1 0x45f0b97e in __lll_mutex_lock_wait () from /lib/libpthread.so.0
#2 0x45f08247 in _L_mutex_lock_340 () from /lib/libpthread.so.0
#3 0x45f0819f in pthread_mutex_lock () from /lib/libpthread.so.0
#4 0x45c7dd29 in pthread_mutex_lock () from /lib/libc.so.6
#5 0x00edf33d in qpid::management::ManagementBroker::periodicProcessing ()
#6 0x00ee00a6 in qpid::management::ManagementBroker::Periodic::fire ()
#7 0x00eceafb in qpid::broker::Timer::run ()
#8 0x00a01c11 in qpid::sys::(anonymous namespace)::runRunnable ()
#9 0x45f0640b in start_thread () from /lib/libpthread.so.0
#10 0x45c71b7e in clone () from /lib/libc.so.6
Thread 4 (Thread -1218851936 (LWP 28313)):
#0 0x45b8b410 in __kernel_vsyscall ()
#1 0x45f0b97e in __lll_mutex_lock_wait () from /lib/libpthread.so.0
#2 0x45f08247 in _L_mutex_lock_340 () from /lib/libpthread.so.0
#3 0x45f0819f in pthread_mutex_lock () from /lib/libpthread.so.0
#4 0x45c7dd29 in pthread_mutex_lock () from /lib/libc.so.6
#5 0x00e715cb in qpid::broker::LinkRegistry::periodicMaintenance ()
#6 0x00e71fa8 in qpid::broker::LinkRegistry::Periodic::fire ()
#7 0x00eceafb in qpid::broker::Timer::run ()
#8 0x00a01c11 in qpid::sys::(anonymous namespace)::runRunnable ()
#9 0x45f0640b in start_thread () from /lib/libpthread.so.0
#10 0x45c71b7e in clone () from /lib/libc.so.6
Thread 3 (Thread -1229341792 (LWP 28314)):
#0 0x45b8b410 in __kernel_vsyscall ()
#1 0x45f0967c in pthread_cond_timedwait@@GLIBC_2.3.2 ()
#2 0x45c7dbf4 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libc.so.6
#3 0x00ecebf0 in qpid::broker::Timer::run ()
#4 0x00a01c11 in qpid::sys::(anonymous namespace)::runRunnable ()
#5 0x45f0640b in start_thread () from /lib/libpthread.so.0
#6 0x45c71b7e in clone () from /lib/libc.so.6
Thread 2 (Thread -1239831648 (LWP 28317)):
#0 0x45b8b410 in __kernel_vsyscall ()
#1 0x45f0b97e in __lll_mutex_lock_wait () from /lib/libpthread.so.0
#2 0x45f08247 in _L_mutex_lock_340 () from /lib/libpthread.so.0
#3 0x45f0819f in pthread_mutex_lock () from /lib/libpthread.so.0
#4 0x45c7dd29 in pthread_mutex_lock () from /lib/libc.so.6
#5 0x00e6f1bc in qpid::broker::LinkRegistry::declare () <---
LinkRegistry::lock required
#6 0x00e6b2d1 in qpid::broker::Link::ManagementMethod ()
#7 0x00dd9ae5 in qmf::org::apache::qpid::broker::Link::doMethod ()
#8 0x00ede600 in qpid::management::ManagementBroker::handleMethodRequestLH ()
#9 0x00ee811c in qpid::management::ManagementBroker::dispatchAgentCommandLH ()
#10 0x00ee8650 in qpid::management::ManagementBroker::dispatchCommand () <---
ManagementBroker::userLock held
#11 0x00eebbf3 in qpid::broker::ManagementExchange::route ()
#12 0x00eaab9d in qpid::broker::SemanticState::route ()
#13 0x00eabeea in qpid::broker::SemanticState::handle ()
#14 0x00ec3412 in qpid::broker::SessionState::handleContent ()
#15 0x00ec3a03 in qpid::broker::SessionState::handleIn ()
#16 0x00ec73eb in
qpid::framing::Handler<qpid::framing::AMQFrame&>::MemFunRef<qp
id::framing::Handler<qpid::framing::AMQFrame&>::InOutHandlerInterface,
&(qpid::f
raming::Handler<qpid::framing::AMQFrame&>::InOutHandlerInterface::handleIn(qpid:
:framing::AMQFrame&))>::handle ()
#17 0x00a2ddaf in qpid::amqp_0_10::SessionHandler::handleIn ()
#18 0x00ec73eb in
qpid::framing::Handler<qpid::framing::AMQFrame&>::MemFunRef<qp
id::framing::Handler<qpid::framing::AMQFrame&>::InOutHandlerInterface,
&(qpid::f
raming::Handler<qpid::framing::AMQFrame&>::InOutHandlerInterface::handleIn(qpid:
:framing::AMQFrame&))>::handle ()
#19 0x00e384ac in qpid::broker::Connection::received ()
#20 0x00bc3602 in ?? ()
#21 0xb380134c in ?? ()
#22 0x09d82608 in ?? ()
#23 0x09d851b8 in ?? ()
#24 0x45c7dd55 in pthread_mutex_unlock () from /lib/libc.so.6
#25 0x00ba3773 in ?? ()
#26 0xb38012a8 in ?? ()
#27 0x09d825f8 in ?? ()
#28 0x09d825f8 in ?? ()
#29 0xb6199dd8 in ?? ()
#30 0x000000c1 in ?? ()
#31 0x00ba47fd in ?? ()
#32 0x09d80568 in ?? ()
#33 0x09d825f8 in ?? ()
#34 0x00000002 in ?? ()
#35 0x00000001 in ?? ()
#36 0xb6199e68 in ?? ()
#37 0x00bac664 in ?? ()
#38 0x09d815e0 in ?? ()
#39 0x09d825f8 in ?? ()
#40 0xb6199e48 in ?? ()
#41 0x45c7dd55 in pthread_mutex_unlock () from /lib/libc.so.6
Thread 1 (Thread -1208158480 (LWP 28311)):
#0 0x45b8b410 in __kernel_vsyscall ()
#1 0x45f0b97e in __lll_mutex_lock_wait () from /lib/libpthread.so.0
#2 0x45f08247 in _L_mutex_lock_340 () from /lib/libpthread.so.0
#3 0x45f0819f in pthread_mutex_lock () from /lib/libpthread.so.0
#4 0x45c7dd29 in pthread_mutex_lock () from /lib/libc.so.6
#5 0x00ee012a in qpid::management::ManagementBroker::raiseEvent () <---
ManagementBroker::userLock required
#6 0x00e6ac23 in qpid::broker::Link::established ()
#7 0x00e70805 in qpid::broker::LinkRegistry::notifyConnection () <---
LinkRegistry::lock held
#8 0x00e3b57d in qpid::broker::Connection::Connection ()
#9 0x00bc80ee in ?? ()
#10 0x09d84dcc in ?? ()
#11 0x09d84d68 in ?? ()
#12 0x09d7ef88 in ?? ()
#13 0x09d85b24 in ?? ()
#14 0x00000001 in ?? ()
#15 0x00000000 in ?? ()
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