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From "Akira AJISAKA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9768) Reuse objectMapper instance in HDFS to improve the performance
Date Fri, 12 Feb 2016 16:31:18 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15144805#comment-15144805
] 

Akira AJISAKA commented on HDFS-9768:
-------------------------------------

+1, the test failure looks unrelated to the patch.

> Reuse objectMapper instance in HDFS to improve the performance
> --------------------------------------------------------------
>
>                 Key: HDFS-9768
>                 URL: https://issues.apache.org/jira/browse/HDFS-9768
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: performance
>    Affects Versions: 2.7.1
>            Reporter: Lin Yiqun
>            Assignee: Lin Yiqun
>         Attachments: HDFS-9768.001.patch, HDFS-9768.002.patch, HDFS-9768.003.patch
>
>
> In HDFS-9724, it have reused the ObjectMapper instance to improve the performance in
{{WebHDFS}}. But in other places, it still using ObjectMapper by {{new ObjectMapper()}}. We
probably need a comprehensive review across the whole codebase to look for this pattern and
modify them. In MAPREDUCE-6626, YARN-4668, these jiras also work for this.



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