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https://issues.apache.org/jira/browse/HBASE-4654?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Demai Ni updated HBASE-4654:
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Attachment: HBASE-4654-0.96-v0.patch
[~lhofhansl], thanks for the reminder. here is the 0.96 patch
> [replication] Add a check to make sure we don't replicate to ourselves
> ----------------------------------------------------------------------
>
> Key: HBASE-4654
> URL: https://issues.apache.org/jira/browse/HBASE-4654
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.90.4
> Reporter: Jean-Daniel Cryans
> Assignee: Demai Ni
> Fix For: 0.98.0, 0.96.1, 0.94.14
>
> Attachments: 4654-trunk.txt, HBASE-4654-0.94-v0.patch,
> HBASE-4654-0.96-v0.patch, HBASE-4654-trunk-v0.patch,
> HBASE-4654-trunk-v0.patch, HBASE-4654-trunk-v0.patch
>
>
> It's currently possible to add a peer for replication and point it to the
> local cluster, which I believe could very well happen for those like us that
> use only one ZK ensemble per DC so that only the root znode changes when you
> want to set up replication intra-DC.
> I don't think comparing just the cluster ID would be enough because you would
> normally use a different one for another cluster and nothing will block you
> from pointing elsewhere.
> Comparing the ZK ensemble address doesn't work either when you have multiple
> DNS entries that point at the same place.
> I think this could be resolved by looking up the master address in the
> relevant znode as it should be exactly the same thing in the case where you
> have the same cluster.
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