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https://issues.apache.org/jira/browse/QPID-7451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15564995#comment-15564995
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Keith Wall commented on QPID-7451:
----------------------------------

Changes look reasonable to me.

> [Java Broker] MessageTransferMessage should cache message size
> --------------------------------------------------------------
>
>                 Key: QPID-7451
>                 URL: https://issues.apache.org/jira/browse/QPID-7451
>             Project: Qpid
>          Issue Type: Bug
>          Components: Java Broker
>    Affects Versions: 0.32, qpid-java-6.0, qpid-java-6.0.1, qpid-java-6.0.2, 
> qpid-java-6.0.3, qpid-java-6.0.4
>            Reporter: Rob Godfrey
>            Assignee: Rob Godfrey
>             Fix For: qpid-java-6.0.5, qpid-java-6.1
>
>         Attachments: QPID-7451_for_0_32.patch
>
>
> AMQMessage (the 0-9-1 path) caches message size, however 
> MessageTransferMessage (the 0-10 path) does not.  This means that the 
> delivery path from AbstractQueue may require retrieval of the message meta 
> data from the store to get the message size.  Since not all requests to get 
> the message size are protected by first getting a message reference, there is 
> a chance of a race whereby the message is removed from the store between 
> checking whether it is available and obtaining the message size.



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