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https://issues.apache.org/jira/browse/HBASE-8211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13618167#comment-13618167
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Lars Hofhansl commented on HBASE-8211:
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[~azuryy], HDFS is handling the NN failover. This just makes sure that HBase
can ride over the failover.
The urls won't change during the NN failover.
The problem here is that not all HDFS operations are idempotent during NN
failover, and hence it is incumbent on an HDFS client (HBase in this case) to
retry the operation.
+1 on patch
> Support for NN HA for 0.94
> --------------------------
>
> Key: HBASE-8211
> URL: https://issues.apache.org/jira/browse/HBASE-8211
> Project: HBase
> Issue Type: Bug
> Components: master, regionserver
> Affects Versions: 0.94.6
> Reporter: Himanshu Vashishtha
> Assignee: Himanshu Vashishtha
> Fix For: 0.94.7
>
> Attachments: HBase-8211-v1.patch
>
>
> HBase-8156 is for adding support for retrying non-idempotent operations. This
> is useful in case NN is suffering from n/w hiccups, etc. This jira is to add
> similar support for 0.94.x branch.
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