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From "James Strachan" <>
Subject Re: ActiveMQ Hangs on OC4J
Date Tue, 01 Aug 2006 09:03:43 GMT
Which version are you using?

The most likely cause is you are using non-persistent messaging and
you have ran out of RAM - try increase your <usageManager/>'s limit
which is pretty small out of the box.

On 8/1/06, Pep <> wrote:
> Hi,
> we deployed ActiveMQ as an embedded broker in OC4J 10.1.3. Everything seemed
> to work fine but we are experiencing some hangs in ActiveMQ after delivering
> some messages (sometimes a lot of messages, sometimes just a few ones). When
> ActiveMQ is hang, we try to connect with Hermes, but we are unable to browse
> the Queue's contents, Hermes just stays trying to connect.
> Furthermore, we are still able to navigate to other parts of the application
> which do not interact with ActiveMQ. This indicates that OC4J is still
> alive. But as soon we call a feature that interacts with ActiveMQ by
> producing messages, then we get the whole system hanged or not working
> properly.
> Unfortuatelly, we do not receive any exception or message that may help
> identify where the hang is produced (we set log4j traces to DEBUG level). We
> are using VM transport protocol inside our application and tcp protocol from
> Hermes.
> Did anyone experience a similar problem? I looked in the Jira repository of
> ActiveMQ but I could not find any issue similar to this one.  Is there any
> way to get detailed info of what is being hang?
> Thanks in advance,
> Pep.
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