[jira] [Created] (SPARK-8578) Should ignore user defined output committer when appending data

["Cheng Lian (JIRA)" <ji...@apache.org>]

Cheng Lian created SPARK-8578:
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             Summary: Should ignore user defined output committer when appending data
                 Key: SPARK-8578
                 URL: https://issues.apache.org/jira/browse/SPARK-8578
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 1.4.0
            Reporter: Cheng Lian
            Assignee: Yin Huai


When appending data to a file system via Hadoop API, it's safer to ignore user defined output committer classes like {{DirectParquetOutputCommitter}}. Because it's relatively hard to handle task failure in this case.  For example, {{DirectParquetOutputCommitter}} directly writes to the output directory to boost write performance when working with S3. However, there's no general way to determine task output file path of a specific task in Hadoop API, thus we don't know to revert a failed append job. (When doing overwrite, we can just remove the whole output directory.)



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