[jira] [Commented] (MAPREDUCE-7370) Parallelize MultipleOutputs#close call

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-7370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17598675#comment-17598675 ] 

ASF GitHub Bot commented on MAPREDUCE-7370:
-------------------------------------------

ashutoshcipher commented on PR #4248:
URL: https://github.com/apache/hadoop/pull/4248#issuecomment-1233602950

   > This looks good overall. I see there is a compilation error to address in the test code. Thanks!
   
   Thanks for reviewing and sharing your comments on PR. I have addressed this in my latest commit.




> Parallelize MultipleOutputs#close call
> --------------------------------------
>
>                 Key: MAPREDUCE-7370
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7370
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>    Affects Versions: 3.3.0
>            Reporter: Prabhu Joseph
>            Assignee: groot
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 2h 20m
>  Remaining Estimate: 0h
>
> This call takes more time when there are lot of files to close and there is a high latency to close. Parallelize MultipleOutputs#close call to improve the speed.
> {code}
>   public void close() throws IOException {
>     for (RecordWriter writer : recordWriters.values()) {
>       writer.close(null);
>     }
>   }
> {code}
> Idea is from [~stevel@apache.org]



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