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Posted to common-issues@hadoop.apache.org by "Rajesh Balamohan (JIRA)" <ji...@apache.org> on 2016/05/25 07:34:12 UTC

[jira] [Created] (HADOOP-13203) S3a: Consider reducing the number of connection aborts by setting correct length in s3 request

Rajesh Balamohan created HADOOP-13203:
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             Summary: S3a: Consider reducing the number of connection aborts by setting correct length in s3 request
                 Key: HADOOP-13203
                 URL: https://issues.apache.org/jira/browse/HADOOP-13203
             Project: Hadoop Common
          Issue Type: Bug
          Components: fs/s3
            Reporter: Rajesh Balamohan
            Priority: Minor


Currently file's "contentLength" is set as the "requestedStreamLen", when invoking S3AInputStream::reopen().  As a part of lazySeek(), sometimes the stream had to be closed and reopened. But lots of times the stream was closed with abort() causing the internal http connection to be unusable. This incurs lots of connection establishment cost in some jobs.  It would be good to set the correct value for the stream length to avoid connection aborts. 

I will post the patch once aws tests passes in my machine.



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