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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4552) Deadlock in RPC Server
Date Thu, 13 Nov 2008 02:11:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12647158#action_12647158
] 

Hudson commented on HADOOP-4552:
--------------------------------

Integrated in Hadoop-trunk #659 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/659/])
    . Fix a deadlock in RPC server. (Raghu Angadi)


> Deadlock in RPC Server
> ----------------------
>
>                 Key: HADOOP-4552
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4552
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 0.16.3
>            Reporter: Raghu Angadi
>            Assignee: Raghu Angadi
>             Fix For: 0.19.0
>
>         Attachments: deadlock-example.txt, HADOOP-4552.patch
>
>
> RPC server could get into a deadlock especially when clients or server are network starved.
This is a deadlock between RPC responder thread trying to check if there are any connection
to be purged and RPC handler trying to queue a response to be written by the responder.
> This was first observed [this thread|http://www.nabble.com/TaskTrackers-disengaging-from-JobTracker-to20234317.html].


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