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Posted to dev@qpid.apache.org by "Alex Rudyy (JIRA)" <ji...@apache.org> on 2015/08/04 17:48:04 UTC
[jira] [Resolved] (QPID-6664) Connection#close may hang awaiting
failover to exhaust retries
[ https://issues.apache.org/jira/browse/QPID-6664?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alex Rudyy resolved QPID-6664.
------------------------------
Resolution: Fixed
> Connection#close may hang awaiting failover to exhaust retries
> --------------------------------------------------------------
>
> Key: QPID-6664
> URL: https://issues.apache.org/jira/browse/QPID-6664
> Project: Qpid
> Issue Type: Bug
> Components: Java Client
> Affects Versions: 0.8, 0.10, 0.12, 0.14, 0.16, 0.18, 0.20, 0.22, 0.24, 0.26, 0.28, 0.30, 0.32
> Reporter: Alex Rudyy
> Assignee: Alex Rudyy
> Fix For: qpid-java-6.0
>
>
> A client's call to Connection#close may hang awaiting failover to exhaust its retry count. This occurs because the failover thread has acquired the failover mutex, and closing sessions requires the same mutex.
> If the connection has no Sessions, instead the Connection#close will complete, but the failover thread will continue to spin in the background.
> The following could be done to fix the issue:
> # AMQConnection#attemptReconnection while expression needs to include !isClosed().
> # AMQConnection#close() needs to acquire the failover mutex *after* its call to doClose(sessions, timeout) to ensure that, in the case of a connection without sessions, the thread performing failover will have finished its work (i.e. for 0-8 the FailoverThread will be ending) before #close returns to the caller.
> # #AMQConnection#exceptionReceived needs to lose responsibility for mutating closed/closing. This responsibility needs to be pushed to its callers. 0-10 already does this, this change will make 0-8 the same. This will mean that _closed means the user has closed the connections, or the Broker has closed the connection and failover has given up.
> # Remove Closable#resetClosedFlag
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