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From "Roelof Naude (JIRA)" <j...@apache.org>
Subject [jira] Updated: (AMQ-2962) Hanging at startup
Date Thu, 28 Oct 2010 06:20:00 GMT

     [ https://issues.apache.org/activemq/browse/AMQ-2962?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Roelof Naude updated AMQ-2962:
------------------------------

    Attachment: AMQ2962.patch

Patch that resolve the issue for us. This patch is ugly. Someone more knowledgeable on the
order of locks may provide more insight.

> Hanging at startup
> ------------------
>
>                 Key: AMQ-2962
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2962
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Message Store
>    Affects Versions: 5.4.1
>         Environment: Fedora Core 12
> OracleSun java 1.6:
> java version "1.6.0_21"
> Java(TM) SE Runtime Environment (build 1.6.0_21-b06)
> Java HotSpot(TM) 64-Bit Server VM (build 17.0-b16, mixed mode)
> JBoss 4.2.3 using AMQ resource adapter.
>            Reporter: Roelof Naude
>         Attachments: amq.ra.threads.txt, AMQ2962.patch, debug_traces_hanging.log, debug_traces_startup.log,
thread_dump_during_hang.txt
>
>
> Noticed today the activemq was hanging during startup. Investigation revealed that it
is tied to expiration of messages at startup. The only way to recover from this was to kill
-9 the VM and delete the kahadb message store.
> Further testing was done whereby message expiry time was set to longer period. AMQ started
up just fine. Another test was performed whereby:
> 1. subscribe for messages
> 2. send a few messages
> 3. disconnect consumer
> 4. send more messages (1 or 2 will do)
> 5. shutdown AMQ
> 6. wait for a time period exceeded the expiration time of the messages
> 7. start AMQ. at this time it should be hanging
> Logs and thread dumps attached.

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