Clifford Jansen created PROTON-2931:
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Summary: Epoll proactor has race conditions with the async c-ares
name resolver library
Key: PROTON-2931
URL: https://issues.apache.org/jira/browse/PROTON-2931
Project: Qpid Proton
Issue Type: Bug
Components: proton-c
Affects Versions: proton-c-0.41.0
Reporter: Clifford Jansen
Assignee: Clifford Jansen
If the c-ares callback is very quick, the pn_raw_connection_t can sometimes
fail to schedule itself and hang while still in the connecting phase. This can
be easily reproduced with a ulimit for open files of 1024 or less and the
following reproducer.
https://github.com/fgiorgetti/router-locust
Conversely, if the callback is extremely slow, the connection can wind up and
free resources before the callback tries to reference through an invalid
pointer. The connection should remember if a callback is pending and defer any
cleanup until this concludes. This applies to raw and AMQP connections.
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