Jinglun created HDFS-14782:
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Summary: Add a new fsck command to get detailed decommission
information.
Key: HDFS-14782
URL: https://issues.apache.org/jira/browse/HDFS-14782
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Jinglun
When we decommission datanodes, sometimes the decommission progress is blocked.
From the Namenode dfshealth page, the statistics of decommissioning datanode
only tells us the number but not which blocks are 'Undre replicated blocks',
'Blocks with no live replicas' and 'Under Replicated Blocks In files under
construction' . So we add a new fsck command to fetch the detail information of
decommissioning nodes. We can use this command to target the blocks that
blocking the node from decommission.
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