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https://issues.apache.org/jira/browse/HDFS-1848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13026121#comment-13026121
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dhruba borthakur commented on HDFS-1848:
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> Point #1 is limited to allowing an admin to specify that not all of these
> configured directories should necessarily be treated
Fully agree. makes complete sense to me.
> Point #2 is if the datanode experiences some types of failures (eg those
> caused by a failed root disk) it should fail-stop.
I am on the fence on this one. It seems like a good idea for a cluster
administrator to have this feature.
> Datanodes should shutdown when a critical volume fails
> ------------------------------------------------------
>
> Key: HDFS-1848
> URL: https://issues.apache.org/jira/browse/HDFS-1848
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: data-node
> Reporter: Eli Collins
> Fix For: 0.23.0
>
>
> A DN should shutdown when a critical volume (eg the volume that hosts the OS,
> logs, pid, tmp dir etc.) fails. The admin should be able to specify which
> volumes are critical, eg they might specify the volume that lives on the boot
> disk. A failure in one of these volumes would not be subject to the threshold
> (HDFS-1161) or result in host decommissioning (HDFS-1847) as the
> decommissioning process would likely fail.
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