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https://issues.apache.org/jira/browse/QPID-8179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16462136#comment-16462136
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Håkan Johansson commented on QPID-8179:
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I made a mistake with my setup when trying to reproduce the bug.
I will run it again and come back to you (probably tomorrow).
> qpid_messaging (amqp1.0) randomly hangs when closing the connection.
> --------------------------------------------------------------------
>
> Key: QPID-8179
> URL: https://issues.apache.org/jira/browse/QPID-8179
> Project: Qpid
> Issue Type: Bug
> Affects Versions: qpid-cpp-1.38.0
> Reporter: Håkan Johansson
> Priority: Major
>
> We are using {{qpid_messaging}} to communicate with an ActiveMQ broker using
> the {{amqp1.0}} protocol.
> We have noticed during both large scale tests and in production that our
> program sometimes hangs when it is closing the connection to the broker. This
> is a very rare occurrence, but happens often enough to be annoying.
> While the design of the {{amqp1.0}} implementation is generally nice, I have
> noticed a lack of life cycle management for the helper objects, especially
> the ones interacting with background threads. The background thread is shut
> down when closing the last remaining connection, but not enough care is being
> taken to make sure it is in a safe state to do so.
> If an event is being processed when the connection is closed, then a deadlock
> might occur, as seen in this stack-trace:
> {noformat}
> #0 0x00007fd104f26945 in pthread_cond_wait@@GLIBC_2.3.2 () from
> /usr/lib64/libpthread.so.0
> #1 0x00007fd10111a420 in qpid::sys::Condition::wait (this=<optimized out>,
> mutex=...) at /qpid-cpp-1.38.0/src/qpid/sys/posix/Condition.h:59
> #2 0x00007fd10112489b in wait (this=0xbaff20) at
> /qpid-cpp-1.38.0/src/qpid/sys/Monitor.h:41
> #3 qpid::sys::TimerTask::cancel (this=0xbafef0) at
> /qpid-cpp-1.38.0/src/qpid/sys/Timer.cpp:94
> #4 0x00007fd105bb367f in qpid::messaging::amqp::ConnectionContext::close
> (this=0xb7b350) at
> /qpid-cpp-1.38.0/src/qpid/messaging/amqp/ConnectionContext.cpp:246
> {noformat}
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