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From "Rob Davies (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AMQ-1557) High message frequency causes ActiveMQ to freeze
Date Wed, 23 Apr 2008 12:44:44 GMT

    [ https://issues.apache.org/activemq/browse/AMQ-1557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=42405#action_42405
] 

Rob Davies commented on AMQ-1557:
---------------------------------

Before we even schedule this issue - the attachment needs to be Granted to the ASF (tick the
check box) and all files should be Apache licenced - could you delete and reapply?

> High message frequency causes ActiveMQ to freeze
> ------------------------------------------------
>
>                 Key: AMQ-1557
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1557
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.0.0, 5.1.0
>         Environment: observed on Windows XP Professional SP2, Sun JDK 1.5.01_11, but
probably affects all platforms
>            Reporter: J├╝rgen Schumacher
>            Assignee: Rob Davies
>         Attachments: stresstest.zip
>
>
> ActiveMQ freezes in a test setup with very high message frequency of persistent messages
and multiple producers and consumers running on multiple machines:
> - Host 1: Multiple Producers send messages very fast to queue1 
> - Host 2: Multiple Processors consume message from queue1 and send a new message for
each consumed message to queue2, also very fast.
> - Host 3: ActiveMQ server and 1 consumer reads messages from queue2.
> With producerFlowControl enabled, the system freezes very soon (a bit more than 1000
messages).
> With producerFlowControl disabled, it seems to run longer at first, but it still freezes
later.
> Using transactions or not does not seem to make a difference.
> See this thread in user mailing list for more details:
> http://www.nabble.com/High-message-frequency-causes-ActiveMQ-to-freeze-to14919292s2354.html
> See attachment for code of test cases and the batch files to start them.

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