Yang Yun created HDFS-15001:
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Summary: Automatically add back the failed volume if it gets
better again
Key: HDFS-15001
URL: https://issues.apache.org/jira/browse/HDFS-15001
Project: Hadoop HDFS
Issue Type: Improvement
Components: datanode
Reporter: Yang Yun
Assignee: Yang Yun
For any reason, if one volume is regard as failed and removed from datanode, we
have to restart the datanode to add it back.
I add a more check on background for failed volume, and add them back
automatically if it gets better again.
Reuse the refreshVolumes logical for the old way can not delete all things
related the failed valume.
Add a new method checkFailedVolume to DatasetVolumeChecker to schedule task for
checking failed volume repeatly.
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