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https://issues.apache.org/jira/browse/HDFS-3275?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13255733#comment-13255733
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Aaron T. Myers commented on HDFS-3275:
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I think that for this JIRA we should punt on the other types of shared dirs
besides file-based. I think we should make format look at the journal type and
print something like "not formatting non-file journal manager..."
How does that sound? At a later point in a different JIRA we can work on a more
general initialization system which is totally agnostic to the type of journal
manager.
> Format command overwrites contents of non-empty shared edits dir if name dirs
> are empty without any prompting
> -------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-3275
> URL: https://issues.apache.org/jira/browse/HDFS-3275
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ha, name-node
> Affects Versions: 2.0.0
> Reporter: Vinithra Varadharajan
> Assignee: amith
>
> To reproduce:
> # Configure a NameNode with namedirs and a shared edits dir, all of which are
> empty.
> # Run hdfs namenode -format. Namedirs and shared edits dir gets populated.
> # Delete the contents of the namedirs. Leave the shared edits dir as is.
> Check the timestamps of the shared edits dir contents.
> # Run format again. The namedirs as well as the shared edits dir get
> formatted. The shared edits dir's contents have been replaced without any
> prompting.
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