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https://issues.apache.org/jira/browse/HDFS-9087?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14905189#comment-14905189
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Elliott Clark commented on HDFS-9087:
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bq.Do we really need to add this configuration key?
Nope not really needed. I'll remove it.
bq. It might be better to limit the jitter to 25% or 50% of the period.
Sure.
bq.Both code paths should set checkDiskErrorInterval the same way.
Sure.
> Add some jitter to DataNode.checkDiskErrorThread
> ------------------------------------------------
>
> Key: HDFS-9087
> URL: https://issues.apache.org/jira/browse/HDFS-9087
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Affects Versions: 2.6.0
> Reporter: Elliott Clark
> Assignee: Elliott Clark
> Attachments: HDFS-9087-v0.patch, HDFS-9087-v1.patch,
> HDFS-9087-v2.patch
>
>
> If all datanodes are started across a cluster at the same time (or errors in
> the network cause ioexceptions) there can be storms where lots of datanodes
> check their disks at the exact same time.
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