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From "Nicolas Spiegelberg (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1418) DFSClient Uses Deprecated "mapred.task.id" Configuration Key Causing Unecessary Warning Messages
Date Fri, 24 Sep 2010 22:02:33 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1418?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12914670#action_12914670
] 

Nicolas Spiegelberg commented on HDFS-1418:
-------------------------------------------

HBase uses 'mapred.task.id' to keep track of RS<->DFSClient.  It needs to be compatible
with 0.20-append & 0.22.  Could this patch just be changed to:
{code}
String taskId = conf.get("mapreduce.task.attempt.id", conf.get("mapred.task.id"));
{code}
Which would avoid the warnings and provide deprecation on the HDFS side as well?

> DFSClient Uses Deprecated "mapred.task.id" Configuration Key Causing Unecessary Warning
Messages
> ------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-1418
>                 URL: https://issues.apache.org/jira/browse/HDFS-1418
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs client
>    Affects Versions: 0.22.0
>            Reporter: Ranjit Mathew
>            Priority: Minor
>         Attachments: HDFS-1418.patch
>
>
> Every invocation of the "hadoop fs" command leads to an unnecessary warning like the
following:
> {noformat}
> $ $HADOOP_HOME/bin/hadoop fs -ls /
> 10/09/24 15:10:23 WARN conf.Configuration: mapred.task.id is deprecated. Instead, use
mapreduce.task.attempt.id
> {noformat}
> This is easily fixed by updating "src/java/org/apache/hadoop/hdfs/DFSClient.java".

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