Gordon Sim created QPID-4764:
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Summary: Locking may lead to deadlock for concurrent receiver
Key: QPID-4764
URL: https://issues.apache.org/jira/browse/QPID-4764
Project: Qpid
Issue Type: Bug
Components: C++ Client
Affects Versions: 0.22
Reporter: Gordon Sim
Assignee: Gordon Sim
Fix For: 0.23
The lock ordering leaves open the possibility of a deadlock if one thread is
fetching on a receiver, another is accepting messages received by it and a
third is closing the receiver.
Thread 1 holds SessionImpl's lock and is blocked on IncomingMessage's lock.
Thread 2 holds IncomingMessage's lock and is blocked on ReceiverImpl's lock.
Thread 3 holds the ReceiverImpl's lock and is blocked on SessionImpl's lock.
I have been unable to reproduce this myself, but an actual incidence has been
reported: https://bugzilla.redhat.com/show_bug.cgi?id=703891
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