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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6640) FileSystem.get() does RPC retries within a static synchronized block
Date Mon, 29 Mar 2010 20:52:27 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12851085#action_12851085
] 

Hairong Kuang commented on HADOOP-6640:
---------------------------------------

Then this means every future RPC call of DFSClient requires a check if a DFSClient has been
initialized or not.

> FileSystem.get() does RPC retries within a static synchronized block
> --------------------------------------------------------------------
>
>                 Key: HADOOP-6640
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6640
>             Project: Hadoop Common
>          Issue Type: Bug
>         Environment: all
>            Reporter: Alejandro Abdelnur
>            Assignee: Hairong Kuang
>            Priority: Critical
>
> If using FileSystem.get() in a multithreaded environment, and one get() locks because
the NN URI is too slow or not responding and retries are in progress, all other get() (for
the diffferent users, NN) are blocked.
> the synchronized block in in the static instance of Cache inner class.

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