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Date: Thu, 15 Oct 2009 04:24:31 -0700 (PDT)
From: "Amareshwari Sriramadasu (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Subject: [jira] Updated: (MAPREDUCE-1098) Incorrect synchronization in
 DistributedCache causes TaskTrackers to freeze up during localization of
 Cache for tasks.
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     [ https://issues.apache.org/jira/browse/MAPREDUCE-1098?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Amareshwari Sriramadasu updated MAPREDUCE-1098:
-----------------------------------------------

    Status: Patch Available  (was: Open)

> Incorrect synchronization in DistributedCache causes TaskTrackers to freeze up during localization of Cache for tasks.
> ----------------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1098
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1098
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>            Reporter: Sreekanth Ramakrishnan
>            Assignee: Amareshwari Sriramadasu
>             Fix For: 0.21.0
>
>         Attachments: patch-1098-1.txt, patch-1098.txt
>
>
> Currently {{org.apache.hadoop.filecache.DistributedCache.getLocalCache(URI, Configuration, Path, FileStatus, boolean, long, Path, boolean)}} allows only one {{TaskRunner}} thread in TT to localize {{DistributedCache}} across jobs. Current way of synchronization is across baseDir this has to be changed to lock on the same baseDir.

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