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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-2234) Roll Hlog if any datanode in the write pipeline dies
Date Thu, 18 Feb 2010 00:23:28 GMT
Roll Hlog if any datanode in the write pipeline dies
----------------------------------------------------

                 Key: HBASE-2234
                 URL: https://issues.apache.org/jira/browse/HBASE-2234
             Project: Hadoop HBase
          Issue Type: Improvement
          Components: regionserver
            Reporter: dhruba borthakur


HDFS does not replicate the last block of a file that is being written to. This means that
is datanodes in the write pipeline die, then the data blocks in the transaction log would
be experiencing reduced redundancy. It would be good if the region server can detect datanode-death
in the write pipeline while writing to the transaction log and if this happens, close the
current log an open a new one. This depends on HDFS-826

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