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https://issues.apache.org/jira/browse/PROTON-1000?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gordon Sim reopened PROTON-1000:
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> Connection leak on heartbeat-timeouted connections
> --------------------------------------------------
>
> Key: PROTON-1000
> URL: https://issues.apache.org/jira/browse/PROTON-1000
> Project: Qpid Proton
> Issue Type: Bug
> Components: python-binding
> Affects Versions: 0.9
> Reporter: Pavel Moravec
> Assignee: Gordon Sim
> Fix For: 0.11
>
>
> Using gofer/katello-agent that uses BlockingConnection from Proton Reactor
> with heartbeats set up, if some connection timeouts due to the heartbeats,
> Proton does not close the TCP connection. That causes TCP connection leak,
> despite gofer properly called BlockingConnection.close() and forgot any
> reference to that class instance.
> Checking tcpdump, Proton simply ignores the timeouted connections - it does
> not respond anyhow to the communication partner whatever it sends (in some
> scenarios it sends some AMQP performative that Proton was assumed to respond,
> in other scenario the communication peer dropped the TCP connection by
> sending FIN+ACK packet but Proton didn't send FIN packet back - the only
> stuff seen in tcpdump is ACKing on TCP layer made by OS, not by Proton). And
> Proton ignores an attempt of Proton reactor to close the
> connection/container, raising:
> Sep 21 15:02:35 my-capsule goferd: File
> "/usr/lib64/python2.7/site-packages/proton/utils.py", line 263, in
> on_transport_closed
> Sep 21 15:02:35 my-capsule goferd: raise ConnectionException("Connection %s
> disconnected" % self.url);
> Sep 21 15:02:35 my-capsule goferd: ConnectionException: Connection
> amqps://satellite.example.com:5647 disconnected
> for SSL connections, and raising:
> Sep 21 14:56:28 my-capsule goferd: File
> "/usr/lib64/python2.7/site-packages/proton/utils.py", line 259, in
> on_transport_tail_closed
> Sep 21 14:56:28 my-capsule goferd: self.on_transport_closed(event)
> Sep 21 14:56:28 my-capsule goferd: File
> "/usr/lib64/python2.7/site-packages/proton/utils.py", line 263, in
> on_transport_closed
> Sep 21 14:56:28 my-capsule goferd: raise ConnectionException("Connection %s
> disconnected" % self.url);
> Sep 21 14:56:28 my-capsule goferd: ConnectionException: Connection
> amqps://satellite.example.com:5647 disconnected
> (some difference between SSL and nonSSL could come from the fact that in my
> case the server part - qdrouterd / Qpid Dispatch Router - sends FIN+ACK
> packet for nonSSL connection, while it does not send anything for SSL
> connection and continue for sending empty AMQP frames due to heartbeats
> enabled forever)
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