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https://issues.apache.org/jira/browse/HADOOP-10278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13901073#comment-13901073
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Hiroshi Ikeda commented on HADOOP-10278:
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AtomicReference to keep a reference of the queue seems inappropriate. Whenever
you get a queue from the AtomicReference, there always exists the possibility
that the queue is already obsolete before any action for the queue, unless
there is some additional synchronization or something.
> Refactor to make CallQueue pluggable
> ------------------------------------
>
> Key: HADOOP-10278
> URL: https://issues.apache.org/jira/browse/HADOOP-10278
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: ipc
> Reporter: Chris Li
> Attachments: HADOOP-10278-atomicref-adapter.patch,
> HADOOP-10278-atomicref-rwlock.patch, HADOOP-10278-atomicref.patch,
> HADOOP-10278-atomicref.patch, HADOOP-10278-atomicref.patch,
> HADOOP-10278-atomicref.patch, HADOOP-10278.patch, HADOOP-10278.patch
>
>
> * Refactor CallQueue into an interface, base, and default implementation that
> matches today's behavior
> * Make the call queue impl configurable, keyed on port so that we minimize
> coupling
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