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https://issues.apache.org/jira/browse/QPID-6770?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14943538#comment-14943538
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ASF subversion and git services commented on QPID-6770:
-------------------------------------------------------
Commit 1706856 from [~k-wall] in branch 'java/trunk'
[ https://svn.apache.org/r1706856 ]
QPID-6770: Ensure that the first buffer returned by
QBB#allocateDirectCollection is always view
> Prevent chains of DirectByteBuffers forming when slicing the thread's cached
> buffer
> -----------------------------------------------------------------------------------
>
> Key: QPID-6770
> URL: https://issues.apache.org/jira/browse/QPID-6770
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker
> Reporter: Keith Wall
>
> The QBB has a per thread cached DirectByteBuffer. Callers requiring a buffer
> are served slices of this buffer. The algorithm currently takes a slice of
> the buffer for the caller, then takes a second slice to represent the bytes
> that remain unused in the buffer and discards the original references. This
> approach has the unfortunate consequence that a chain of ByteBuffers forms as
> each DirectByteBuffer slice references its parent via its attachment field.
> The following posting describes the issue:
> http://mail.openjdk.java.net/pipermail/core-libs-dev/2014-February/024857.html
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