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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2013/08/10 20:43:47 UTC
[jira] [Updated] (HBASE-3787) Increment is non-idempotent but
client retries RPC
[ https://issues.apache.org/jira/browse/HBASE-3787?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack updated HBASE-3787:
-------------------------
Fix Version/s: (was: 0.95.2)
Moving out. [~sershe] has done bunch of research and has proposed patch up. Needs more review and testing. Won't make the 0.96 cut and can come in later anyways.
> Increment is non-idempotent but client retries RPC
> --------------------------------------------------
>
> Key: HBASE-3787
> URL: https://issues.apache.org/jira/browse/HBASE-3787
> Project: HBase
> Issue Type: Bug
> Components: Client
> Affects Versions: 0.94.4, 0.95.2
> Reporter: dhruba borthakur
> Assignee: Sergey Shelukhin
> Priority: Blocker
> Attachments: HBASE-3787-partial.patch, HBASE-3787-v0.patch, HBASE-3787-v1.patch, HBASE-3787-v2.patch, HBASE-3787-v3.patch, HBASE-3787-v4.patch, HBASE-3787-v5.patch, HBASE-3787-v5.patch
>
>
> The HTable.increment() operation is non-idempotent. The client retries the increment RPC a few times (as specified by configuration) before throwing an error to the application. This makes it possible that the same increment call be applied twice at the server.
> For increment operations, is it better to use HConnectionManager.getRegionServerWithoutRetries()? Another option would be to enhance the IPC module to make the RPC server correctly identify if the RPC is a retry attempt and handle accordingly.
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