[jira] [Created] (HDFS-8872) Reporting of missing blocks is different in fsck and namenode ui/metasave

["Rushabh S Shah (JIRA)" <ji...@apache.org>]

Rushabh S Shah created HDFS-8872:
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             Summary: Reporting of missing blocks is different in fsck and namenode ui/metasave
                 Key: HDFS-8872
                 URL: https://issues.apache.org/jira/browse/HDFS-8872
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 2.6.0
            Reporter: Rushabh S Shah
            Assignee: Rushabh S Shah
             Fix For: 2.7.2


Namenode ui and metasave will not report a block as missing if the only replica is on decommissioning/decomissioned node where fsck will show it as MISSING.
Since decommissioned node can be formatted/removed anytime, we can actually lose the block.
Its better to alert on namenode ui if the only copy is on decomissioned/decommissioning node.



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