Lei (Eddy) Xu created HDFS-9715:
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Summary: Check storage ID uniqueness on datanode startup
Key: HDFS-9715
URL: https://issues.apache.org/jira/browse/HDFS-9715
Project: Hadoop HDFS
Issue Type: Improvement
Components: datanode
Affects Versions: 2.7.2
Reporter: Lei (Eddy) Xu
Assignee: Lei (Eddy) Xu
We should fix this to check storage ID uniqueness on datanode startup. If
someone has manually edited the storage ID files, or if they have duplicated a
directory (or re-added an old disk) they could end up with a duplicate storage
ID and not realize it.
The HDFS-7575 fix does generate storage UUID for each storage, but not checks
the uniqueness of these UUIDs.
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