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https://issues.apache.org/jira/browse/PROTON-2027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16815633#comment-16815633
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ASF subversion and git services commented on PROTON-2027:
---------------------------------------------------------
Commit 8a84224cc79377b09bed59a33d1d11b641b45505 in qpid-proton's branch
refs/heads/0.27.x from Clifford Jansen
[ https://gitbox.apache.org/repos/asf?p=qpid-proton.git;h=8a84224 ]
PROTON-2027: Test case with two closing connection contexts competing with a
third context in pn_proactor_disconnect().
(cherry picked from commit f973528912b3b74e8d1e50317429e202e9f51ec4)
> Proactor connection wake after memory freed when using
> pn_proactor_disconnect().
> --------------------------------------------------------------------------------
>
> Key: PROTON-2027
> URL: https://issues.apache.org/jira/browse/PROTON-2027
> Project: Qpid Proton
> Issue Type: Bug
> Components: proton-c
> Affects Versions: proton-c-0.27.0
> Reporter: Cliff Jansen
> Assignee: Cliff Jansen
> Priority: Major
> Fix For: proton-c-0.27.1, proton-c-0.28.0
>
>
> The normal cleanup procedure for epoll and win_iocp proactors waits for all
> async activity to complete before freeing memory.
> pn_proactor_disconnect can't actually force a close so it launches a separate
> async activity piggy-backed on the internal wake mechanism of any connections
> to be closed.
> If the disconnect is happening at the same time as a separate thread doing a
> normal close, a new wake can result after concluding there are none left.
> The solution is to mark the connection as "already awake" before entering the
> cleanup code so new wakes are no-ops. The libuv proactor doesn't need this
> as the disconnect function is managed within libuv and never competes with
> the normal close operation.
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