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https://issues.apache.org/jira/browse/HBASE-9141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13732764#comment-13732764
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Jean-Daniel Cryans commented on HBASE-9141:
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bq. This throws it
Ugh you're right but this is kinda dumb since ZKCE is a IOE.
bq. If znode is there, it doesn't do anything.
I haven't tried it but I don't see the check in the code, it just tries to
create the znodes in recreateZnodes(). Have you tried it?
Also, where you do mention in the tool that the znodes need to be deleted by
the user? Can we not rely on having the user doing it and move them aside for
them?
bq. Hmm, that's a bit tricky I think. I would try to come up with one.
I don't see how, you just need ZK and the local filesystem. Are you saying this
because it needs to read the old format?
> Replication Znodes Backup Tool
> ------------------------------
>
> Key: HBASE-9141
> URL: https://issues.apache.org/jira/browse/HBASE-9141
> Project: HBase
> Issue Type: Improvement
> Components: migration, Replication
> Affects Versions: 0.94.10
> Reporter: Himanshu Vashishtha
> Assignee: Himanshu Vashishtha
> Fix For: 0.95.2
>
> Attachments: HBase-9141.patch
>
>
> While migrating to 0.96, we recommend deleting old znodes so users not face
> issues like HBASE-7766, and let HBase create them out of box.
> Though HBase tends to store only ephemeral data in zookeeper, replication has
> a different approach. Almost all of its data (state, peer info, logs, etc) is
> present in zookeeper. We would like to preserve them in order to not do
> re-adding of peers, and ensuring complete replication after we have migrated
> to 0.96.
> This jira adds a tool to serialize/de-serialize replication znodes to the
> underlying filesystem. This could be used while migrating to 0.96.0.
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