Clifford Jansen created QPID-8527:
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Summary: Hang in qpidd failing to resume read activity on TLS
connections.
Key: QPID-8527
URL: https://issues.apache.org/jira/browse/QPID-8527
Project: Qpid
Issue Type: Bug
Components: C++ Broker
Affects Versions: qpid-cpp-1.39.0
Environment: Posix only.
Reporter: Clifford Jansen
Assignee: Clifford Jansen
The Posix AsynchIO implementation imposes a timeslice on read and write
activity to promote resource fairness between AMQP connections.
This mechanism relies on the poller to reschedule the suspended read activity
which it does when it sees unread bytes on the socket. This works for normal
TCP sockets. It can fail for TLS connections if the TLS layer (libnss) has
buffered bytes that are "hidden" from the poller.
The write side doesn't get starved or fail to notice when a socket is unblocked
for writing in the TLS case.
Posix only. The Windows implementation relies on the read and write completions
being fairly evenly distributed between connections.
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