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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13163) Reuse pre-computed filestatus in Distcp-CopyMapper
Date Tue, 17 May 2016 12:18:13 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15286489#comment-15286489
] 

Hudson commented on HADOOP-13163:
---------------------------------

FAILURE: Integrated in Hadoop-trunk-Commit #9790 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/9790/])
HADOOP-13163 Reuse pre-computed filestatus in Distcp-CopyMapper (Rajesh (stevel: rev c69a649257a331da55c1a1bf61c819e289015a6b)
* hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/mapred/CopyMapper.java


> Reuse pre-computed filestatus in Distcp-CopyMapper
> --------------------------------------------------
>
>                 Key: HADOOP-13163
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13163
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: tools/distcp
>    Affects Versions: 2.8.0
>            Reporter: Rajesh Balamohan
>            Priority: Minor
>             Fix For: 2.8.0
>
>         Attachments: HADOOP-13163.001.patch
>
>
> https://github.com/apache/hadoop/blob/af942585a108d70e0946f6dd4c465a54d068eabf/hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/mapred/CopyMapper.java#L185
> targetStatus is already computed and it can be reused in checkUpdate() function. This
wouldn't be a major issue in NN/HDFS, but in the case of S3 getFileStatus calls can be expensive.



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