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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-9691) RPC clients can generate call ID using AtomicInteger instead of synchronizing on the Client instance.
Date Tue, 09 Jul 2013 23:47:48 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-9691?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chris Nauroth updated HADOOP-9691:
----------------------------------

    Fix Version/s: 3.0.0

I've committed this patch to trunk.  I'm leaving the issue open pending merge through to branch-2.1.0-beta,
which needs to wait for merge of the HADOOP-9688 patch.
                
> RPC clients can generate call ID using AtomicInteger instead of synchronizing on the
Client instance.
> -----------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-9691
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9691
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: ipc
>    Affects Versions: 3.0.0, 2.1.0-beta
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>            Priority: Minor
>             Fix For: 3.0.0
>
>         Attachments: HADOOP-9691.1.patch, HADOOP-9691.2.patch, HADOOP-9691.3.patch
>
>
> As noted in discussion on HADOOP-9688, we can optimize generation of call ID in the RPC
client code.  Currently, it synchronizes on the {{Client}} instance to coordinate access to
a shared {{int}}.  We can switch this to {{AtomicInteger}} to avoid lock contention.

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