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From "Anu Engineer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14901) ReuseObjectMapper in Hadoop Common
Date Fri, 22 Sep 2017 22:44:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16177286#comment-16177286
] 

Anu Engineer commented on HADOOP-14901:
---------------------------------------

[~hanishakoneru] thanks for identifying and fixing this issue. This is a kind of issue that
worries me when I commit. Hadoop common might impact the downstream, unfortunately, we don't
get a test coverage till we commit. So I am going to commit to trunk and wait for 3.0 beta1
to be released.

+1, I will commit this shortly in the trunk.

cc: [~andrew.wang] I will get this change in 3.0 after the beta1 is cut, this is performance
change that 3.0 beta1 can live without.



> ReuseObjectMapper in Hadoop Common
> ----------------------------------
>
>                 Key: HADOOP-14901
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14901
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Hanisha Koneru
>            Assignee: Hanisha Koneru
>            Priority: Minor
>         Attachments: HADOOP-14901.001.patch
>
>
> It is recommended to reuse ObjectMapper, if possible, for better performance. We can
aslo use ObjectReader or ObjectWriter to replace the ObjectMapper in some places: they are
straightforward and thread safe.



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