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https://issues.apache.org/jira/browse/HDFS-12410?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anu Engineer resolved HDFS-12410.
---------------------------------
    Resolution: Not A Bug

After some discussion, we are going to keep the behavior that if a storage 
config option is something that Hadoop does not recognize, data nodes will fail 
during startup.

Please feel free to reopen or comment if we have missed anything during this 
discussion.

Thanks to [~ajayydv], [~chris.douglas] and [~elgoiri] for the discussion.

> Ignore unknown StorageTypes
> ---------------------------
>
>                 Key: HDFS-12410
>                 URL: https://issues.apache.org/jira/browse/HDFS-12410
>             Project: Hadoop HDFS
>          Issue Type: Task
>          Components: datanode, fs
>            Reporter: Chris Douglas
>            Priority: Minor
>
> A storage configured with an unknown type will cause runtime exceptions. 
> Instead, these storages can be ignored/skipped.



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