Roll Hlog if any datanode in the write pipeline dies
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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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