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https://issues.apache.org/jira/browse/HDFS-10495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15985457#comment-15985457
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Kihwal Lee commented on HDFS-10495:
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I've analyzed this and discussed potential solutions in HDFS-11609. The
current patch is to allow replication from decommissioned node if there is no
other choice. If this is not desirable, it is easy to mark the block simply
missing.
> Block should be marked as missing if the all the replicas are on
> Decommissioned nodes.
> --------------------------------------------------------------------------------------
>
> Key: HDFS-10495
> URL: https://issues.apache.org/jira/browse/HDFS-10495
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.8.0
> Reporter: Rushabh S Shah
> Assignee: Rushabh S Shah
>
> As discussed on HDFS-8872, we should mark a block as missing if all the
> replicas on decommissioned nodes since we can take the decommissioned nodes
> out of rotation anytime.
> We have seen multiple cases where all the replicas land on decommissioned
> nodes.
> After HDFS-7933, it doesn't mark as missing.
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