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https://issues.apache.org/jira/browse/HBASE-8156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13611240#comment-13611240
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stack commented on HBASE-8156:
------------------------------
+1
Waiting on hadoopqa to pass.
> Support for Namenode HA for non-idempotent operations
> -----------------------------------------------------
>
> Key: HBASE-8156
> URL: https://issues.apache.org/jira/browse/HBASE-8156
> Project: HBase
> Issue Type: Sub-task
> Components: Filesystem Integration
> Affects Versions: 0.95.0
> Reporter: Himanshu Vashishtha
> Assignee: Himanshu Vashishtha
> Fix For: 0.98.0
>
> Attachments: HBase-8156-trunk-v1.patch, HBase-8156-trunk-v2.patch,
> HBase-8156-trunk-v3.patch
>
>
> In hadoop 2 HA, non-idempotent operations are not retried at the hdfs side.
> This is by design as retrying a non-idempotent operation might not be a good
> design choice for some use case.
> HBase needs to handle the retries for such operations at its end.
> With HBase-7806, there is already some work going on for file system
> abstractions. There, HReginFileSystem sits as an abstraction between region
> and FS. This jira is a move in the same direction, where it adds retry
> functionality for non-idempotent calls such as create, rename and delete in
> HRegionFileSystem class.
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