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From "Hiram Chirino (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (APLO-210) Sending persistent message to a durable subscription would eventually lockup producers.
Date Fri, 22 Jun 2012 14:13:42 GMT

     [ https://issues.apache.org/jira/browse/APLO-210?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hiram Chirino resolved APLO-210.
--------------------------------

    Resolution: Fixed

Bug fix committed.  I've deployed build apache-apollo-99-trunk-20120622.140958-54 with the
fix.
                
> Sending persistent message to a durable subscription would eventually lockup producers.
> ---------------------------------------------------------------------------------------
>
>                 Key: APLO-210
>                 URL: https://issues.apache.org/jira/browse/APLO-210
>             Project: ActiveMQ Apollo
>          Issue Type: Bug
>          Components: apollo-broker
>         Environment: apollo-99-trunk-20120519.032132-42
>            Reporter: Lionel Cons
>            Assignee: Hiram Chirino
>            Priority: Blocker
>             Fix For: 1.4
>
>         Attachments: apollo.dump, apollo2.dump
>
>
> One of our applications using Apollo seems to trigger a very severe bug inside the broker.
> The application is very simple: a few short lived producers that send a few messages
to a single topic, disconnect and start again after some time, plus one or two long lived
consumers using durable subscriptions. All this works fine initially but after some time (15
to 30 minutes, it depends), this stops working and the sent messages are not received anymore.
> On the surface, the broker seems to be working fine and other clients do work. However,
the console reports weird statistics for the topic: the enqueued and dispatched counters do
grow while dequeued does not change. Worse: the broker is in a bizarre state and cannot be
stopped cleanly ("service apollo stop" yields to "Could not stop process PID") and only "kill
-9" can get rid of it.
> I've tried to reproduce the problem with simple scripts and I could not. I suspect a
concurrency problem between the concurrent producers and consumers.
> I will attach a stack dump of the broker when it is in this weird state. If this is not
enough, we can give you access to the broker the next time this happens.

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