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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HADOOP-3457) IPC.Client retry delay should be interruptible
Date Sat, 30 Jan 2010 15:22:34 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3457?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Steve Loughran resolved HADOOP-3457.
------------------------------------

    Resolution: Duplicate

Mergin in with HADOOP-6221

> IPC.Client retry delay should be interruptible
> ----------------------------------------------
>
>                 Key: HADOOP-3457
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3457
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: ipc
>    Affects Versions: 0.20.2, 0.21.0, 0.22.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>             Fix For: 0.22.0
>
>         Attachments: HADOOP-3457.patch, HADOOP-3457.patch, HADOOP-3457.patch
>
>
> The delay of ipc.Client.handleConnectionFailure() that causes the client to block and
wait is hard coded at 1 second; any interruption of the thread is treated as a shortening
of the delay.
>       // otherwise back off and retry
>       try {
>         Thread.sleep(1000);
>       } catch (InterruptedException ignored) {}
>       
> 1. this delay could be configurable; different clients may wish to retry more/less often.
or at a slightly different rate than their peers.
> 2. interrupting the thread may imply the client has been requested to terminate -this
could be handled by declaring failure early, rather than continuing to retry until the retry
count is exceeded.

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