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Date: Fri, 9 Dec 2011 18:26:40 +0000 (UTC)
From: "stack (Commented) (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-4992) Use a UUID for HFileOutputFormat
 partition path name
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    [ https://issues.apache.org/jira/browse/HBASE-4992?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13166400#comment-13166400 ] 

stack commented on HBASE-4992:
------------------------------

+1
                
> Use a UUID for HFileOutputFormat partition path name
> ----------------------------------------------------
>
>                 Key: HBASE-4992
>                 URL: https://issues.apache.org/jira/browse/HBASE-4992
>             Project: HBase
>          Issue Type: Bug
>          Components: mapreduce
>            Reporter: Scott Chen
>            Priority: Minor
>         Attachments: HBASE-4992.txt
>
>
> HFileOutputFormat uses timestamps for the path name to avoid collision.
> It is possible the path name still collide and causing MR job fails.
> Caused by: java.io.IOException: File: hdfs://ubasedev001-snc3-dfs-nn.data.facebook.com:9000/user/hadoop/partitions_1316142976586#_\
> partition.lst has changed on HDFS since job started
> at org.apache.hadoop.filecache.DistributedCache.ifExistsAndFresh(DistributedCache.java:572)
> at org.apache.hadoop.filecache.DistributedCache.checkCacheStatusValidity(DistributedCache.java:465)
> at org.apache.hadoop.filecache.DistributedCache.getLocalCache(DistributedCache.java:230)
> at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:208)

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