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From "Sathish V (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMQ-3889) Body Preview of BytesMessages change when browsed multiple times from QueueViewMbean
Date Tue, 02 Oct 2012 04:15:09 GMT

    [ https://issues.apache.org/jira/browse/AMQ-3889?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13467469#comment-13467469
] 

Sathish V commented on AMQ-3889:
--------------------------------

Thanks for your quick response.    My aim to create a external tool using JMX that will monitor
few ActiveMQ Queues periodically and peek(browse) into certain non-well formed messages and
raise alerts.

Few questions, if you can answer, will help me a lot.
1) Is there a workaround available for this?  
2) Is this an issue with activeMQ JMX agent service?  The upcoming patch to be applied to
activeMQ service?
3) I guess even though the browse shows message with null characters(after couple of browsing
on the same message), read message actually fetches the message properly, please confirm if
this is correct.  

Thanks
Sathish
                
> Body Preview of BytesMessages change when browsed multiple times from QueueViewMbean
> ------------------------------------------------------------------------------------
>
>                 Key: AMQ-3889
>                 URL: https://issues.apache.org/jira/browse/AMQ-3889
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: JMX
>    Affects Versions: 5.5.1
>         Environment: Linux 64-bit, multiple java versions.
>            Reporter: Robin Kåveland Hansen
>            Assignee: Timothy Bish
>            Priority: Minor
>             Fix For: 5.7.0
>
>         Attachments: OpenTypeSupport.diff, OpenTypeSupportTest.java
>
>
> When using the browse method of org.apache.activemq.broker.jmx.QueueViewMBean to obtain
CompositeData of messages, the Body Preview of BytesMessages changes between each browse.
> I am not sure if that is intended behaviour, but I have written a testcase that illustrates
it. 
> I have also narrowed it down to org.apache.activemq.broker.jmx.OpenTypeSupport.BytesMessageOpenTypeFactory,
which uses ActiveMQBytesMessage.readBytes but does not call reset afterwards.

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