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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-6640) FileSystem.get() does RPC retries within a static synchronized block
Date Wed, 05 May 2010 19:45:05 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-6640?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hairong Kuang updated HADOOP-6640:
----------------------------------

    Attachment: getFS_yahoo20s.patch

This patch is for Yahoo's 0.20s branch.

> 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
>          Components: fs
>         Environment: all
>            Reporter: Alejandro Abdelnur
>            Assignee: Hairong Kuang
>            Priority: Critical
>             Fix For: 0.21.0
>
>         Attachments: getFS.patch, getFS_yahoo20s.patch
>
>
> 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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