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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-642) Explicit timeout for ipc.Client
Date Thu, 26 Oct 2006 02:03:19 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-642?page=all ]

Konstantin Shvachko updated HADOOP-642:

    Status: Patch Available  (was: Open)

> Explicit timeout for ipc.Client
> -------------------------------
>                 Key: HADOOP-642
>                 URL: http://issues.apache.org/jira/browse/HADOOP-642
>             Project: Hadoop
>          Issue Type: Bug
>    Affects Versions: 0.7.2
>            Reporter: Konstantin Shvachko
>         Attachments: IpcClientTimeout.patch
> This bug contributed to the crash discussed in HADOOP-572.
> ipc.Client is trying to establish connection with its server with an infinite timeout.
> For an unknown to me reason infinity equals 3 minutes in this case.
> I guess it is configured somewhere in the native socket implementation.
> With this timeout data-nodes had only 3 chances to send heartbeats during the 10
> minute expiration interval. And with a very busy name-node this makes their
> chances to be accepted close to 0.
> I included an explicit call of Socket.connect() with a timeout set to 1 min, which is
> our default for all connections.
> Modified a log message to include information that turned out to be useful for debugging.
> Removed unnecessary imports.

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