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From "Manoj Govindassamy (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11718) DFSStripedOutputStream hsync/hflush should not throw UnsupportedOperationException
Date Fri, 28 Apr 2017 18:46:04 GMT
Manoj Govindassamy created HDFS-11718:
-----------------------------------------

             Summary: DFSStripedOutputStream hsync/hflush should not throw UnsupportedOperationException
                 Key: HDFS-11718
                 URL: https://issues.apache.org/jira/browse/HDFS-11718
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: erasure-coding
    Affects Versions: 3.0.0-alpha1
            Reporter: Manoj Govindassamy
            Assignee: Manoj Govindassamy
            Priority: Blocker


FSDataOutputStream#hsync checks if a stream implements Syncable, and if so, calls hsync. Otherwise,
it just calls flush. This is used, for instance, by YARN's FileSystemTimelineWriter.

DFSStripedOutputStream extends DFSOutputStream, which implements Syncable. However, DFSStripedOS
throws a runtime exception when the Syncable methods are called.

We should refactor the inheritance structure so DFSStripedOS does not implement Syncable.



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