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Posted to dev@parquet.apache.org by "Brian Mwambazi (Jira)" <ji...@apache.org> on 2020/01/14 22:24:00 UTC

[jira] [Created] (PARQUET-1768) InternalParquetRecordWriter doesn't immediately limit current row group to thres

Brian Mwambazi created PARQUET-1768:
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             Summary: InternalParquetRecordWriter doesn't immediately limit current row group to thres
                 Key: PARQUET-1768
                 URL: https://issues.apache.org/jira/browse/PARQUET-1768
             Project: Parquet
          Issue Type: Bug
          Components: parquet-mr
            Reporter: Brian Mwambazi


The MemoryManager adjust the row group size threshold of writers when the allocated memory pool fills up.
*Problem*: However InternalParquetRecordWriter only re-adjusts the row group size on the next flush meaning they still use the old size. 
This opens up a possibility of getting an OOM error if all writers are started at relatively the same time and progress in tandem(I saw this when investigating failing jobs while writing to disk in Spark)



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