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

["Prabhu Joseph (Jira)" <ji...@apache.org>]

Prabhu Joseph created MAPREDUCE-7370:
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             Summary: 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: Ravuri Sushma sree


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}



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