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Date: Wed, 1 Jun 2011 23:20:47 +0000 (UTC)
From: "Hiram Chirino (JIRA)" <jira@apache.org>
To: commits@activemq.apache.org
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Subject: [jira] [Commented] (APLO-1) "Detected store dropped message" errors
 when broker is run against the stomp-benchmark
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    [ https://issues.apache.org/jira/browse/APLO-1?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13042507#comment-13042507 ] 

Hiram Chirino commented on APLO-1:
----------------------------------

I've updated the BDB store so that if it gives failed message load attempts a 2nd try just in case there's a timing window bug.  I've also added better error detection and retry logic so that if BDB does run into an odd situation like out of file handles or something, that it will keep retrying the transaction until it succeeds or the broker gets shutdown.  Also added a bit more logging if that case is encountered.

> "Detected store dropped message" errors when broker is run against the stomp-benchmark
> --------------------------------------------------------------------------------------
>
>                 Key: APLO-1
>                 URL: https://issues.apache.org/jira/browse/APLO-1
>             Project: ActiveMQ Apollo
>          Issue Type: Bug
>          Components: apollo-bdb, apollo-broker
>    Affects Versions: 1.0-beta2
>            Reporter: Hiram Chirino
>            Assignee: Hiram Chirino
>             Fix For: 1.0-beta3
>
>
> Lionel Cons wrote:
> {quote}
>  ran stomp-benchmark several times in a row against Apollo
> 20110505.135118-111 and it worked fine with one exception.
> During less than one second, it logged several messages like this:
> 2011-05-11 05:54:09,661 | INFO  | Detected store dropped message at seq: 467787239 | org.apache.activemq.apollo.broker.QueueEntry | bdb store io read
> 2011-05-11 05:54:09,661 | INFO  | Detected store dropped message at seq: 467787240 | org.apache.activemq.apollo.broker.QueueEntry | bdb store io read
> 2011-05-11 05:54:09,662 | INFO  | Detected store dropped message at seq: 467787241 | org.apache.activemq.apollo.broker.QueueEntry | bdb store io read
> [...]
> 2011-05-11 05:54:09,681 | INFO  | Detected store dropped message at seq: 467787325 | org.apache.activemq.apollo.broker.QueueEntry | bdb store io read
> 2011-05-11 05:54:09,681 | INFO  | Detected store dropped message at seq: 467787326 | org.apache.activemq.apollo.broker.QueueEntry | bdb store io read
> 2011-05-11 05:54:09,681 | INFO  | Detected store dropped message at seq: 467787327 | org.apache.activemq.apollo.broker.QueueEntry | bdb store io read
> {quote}

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