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[jira] [Created] (HBASE-20841) Add note about the limitations when running WAL against higher version of hadoop


Duo Zhang created HBASE-20841:
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             Summary: Add note about the limitations when running WAL against higher version of hadoop
                 Key: HBASE-20841
                 URL: https://issues.apache.org/jira/browse/HBASE-20841
             Project: HBase
          Issue Type: Sub-task
            Reporter: Duo Zhang


AsyncFSWAL may easily be broken when upgrading the DFSClient, so we introduced a fallback logic in HBASE-20839. And also, WAL can not be written into a directory with EC enabled, but the API for creating a non-EC file in EC directory is not available in hadoop-2.8-, see HBASE-19369 for more details.



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