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Posted to dev@qpid.apache.org by "ASF subversion and git services (JIRA)" <ji...@apache.org> on 2015/10/05 12:27:27 UTC
[jira] [Commented] (QPID-6770) Prevent chains of DirectByteBuffers
forming when slicing the thread's cached buffer
[ https://issues.apache.org/jira/browse/QPID-6770?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14943194#comment-14943194 ]
ASF subversion and git services commented on QPID-6770:
-------------------------------------------------------
Commit 1706787 from [~k-wall] in branch 'java/trunk'
[ https://svn.apache.org/r1706787 ]
QPID-6770: Prevent chains of DirectByteBuffers forming when slicing the thread-local cached buffer
> 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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