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From "Gary Tully (JIRA)" <>
Subject [jira] Commented: (AMQ-2721) Broker hangs reading KahaDB data store
Date Wed, 05 May 2010 14:44:35 GMT


Gary Tully commented on AMQ-2721:

would it be possible to attach a zip/tar.gz of your store directory so that this could be
reproduced. It looks like it is in the middle or recovery but it should not take hours. How
big is the store?

> Broker hangs reading KahaDB data store
> --------------------------------------
>                 Key: AMQ-2721
>                 URL:
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.3.1
>         Environment: Red hat enterprise
>            Reporter: Dennis Klinkott
>         Attachments: brokerjstack.log
> Broker hangs on loading the data store. Happens after using the broker for 10 hours in
productive environment.
> In broker log the last entries we see is a bunch of loading kahadb debug entries.
> 2010-05-05 16:06:19,462 | DEBUG | loading | org.apache.kahadb.index.BTreeIndex | main
> But the broker doesn't stall completely. It is doing something with high cpu load. But
it doesn't get the data store loaded. Even after a few hours it doesn't get finished (usually
only takes a few seconds).
> I took a few jstack-dumps where we can see the broker being busy putting something into
a hashmap.
> We have 2 brokers connected as network of brokers.

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