[jira] [Created] (HIVE-11344) HIVE-9845 makes HCatSplit.write modify the split so that PartitionInfo objects are unusable after it

["Sushanth Sowmyan (JIRA)" <ji...@apache.org>]

Sushanth Sowmyan created HIVE-11344:
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             Summary: HIVE-9845 makes HCatSplit.write modify the split so that PartitionInfo objects are unusable after it
                 Key: HIVE-11344
                 URL: https://issues.apache.org/jira/browse/HIVE-11344
             Project: Hive
          Issue Type: Bug
    Affects Versions: 1.2.0
            Reporter: Sushanth Sowmyan
            Assignee: Sushanth Sowmyan


HIVE-9845 introduced a notion of compression for HCatSplits so that when serializing, it finds commonalities between PartInfo and TableInfo objects, and if the two are identical, it nulls out that field in PartInfo, thus making sure that when PartInfo is then serialized, info is not repeated.

This, however, has the side effect of making the PartInfo object unusable if HCatSplit.write has been called.

While this does not affect M/R directly, since they do not know about the PartInfo objects and once serialized, the HCatSplit object is recreated by deserializing on the backend, which does restore the split and its PartInfo objects, this does, however, affect framework users of HCat that try to mimic M/R and then use the PartInfo objects to instantiate distinct readers.

Thus, we need to make it so that PartInfo is still usable after HCatSplit.write is called.



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