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Posted to issues@hbase.apache.org by "Andrew Purtell (JIRA)" <ji...@apache.org> on 2013/01/30 20:29:14 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 ]

Andrew Purtell updated HBASE-3787:
----------------------------------

             Priority: Critical  (was: Major)
    Affects Version/s: 0.96.0
                       0.94.4
        Fix Version/s: 0.96.0
             Assignee:     (was: dhruba borthakur)
    
> 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: 0.96.0, 0.94.4
>            Reporter: dhruba borthakur
>            Priority: Critical
>             Fix For: 0.96.0
>
>
> 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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