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Posted to dev@qpid.apache.org by "Ted Ross (JIRA)" <qp...@incubator.apache.org> on 2010/01/04 21:15:54 UTC
[jira] Assigned: (QPID-2319) qpid-route hangs when connecting to
the Java Broker
[ https://issues.apache.org/jira/browse/QPID-2319?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ted Ross reassigned QPID-2319:
------------------------------
Assignee: Ted Ross
> qpid-route hangs when connecting to the Java Broker
> ---------------------------------------------------
>
> Key: QPID-2319
> URL: https://issues.apache.org/jira/browse/QPID-2319
> Project: Qpid
> Issue Type: Bug
> Components: python tools
> Reporter: Rob Godfrey
> Assignee: Ted Ross
>
> When working on the QMF implementation in the Java Broker I found that the Python tools which use the qmf.console python API hung in the _waitForStable function of the Broker class
> Investigating showed that although the count of outstandingRequests did drop to zero (the condition the function is waiting for) it was not being alerted to this fact.
> Adding debugging information into the code I could see that on entering _waitForStable the count of outstanding requests was 1...
> After entering the wait() the count droppped to zero through a call to _decOustanding ... then increased again all the way up to through calls to incOutstanding 26... then again dropped all the way to 0.
> Looking at the code for _decOutstanding it's clear that the wait should be notified that the count has dropped to zero, as long as the syncInFlight variable is true.
> If this check is commented out (i.e. decOustanding calls notify even if syncInFlight is false) then the tools do not hang
> the conclusion would seem to be that something is setting syncInFlight to false causing the _waitForStable function to not receive notifications that it can stop waiting...
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