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https://issues.apache.org/jira/browse/HBASE-3787?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13567136#comment-13567136
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Ted Yu edited comment on HBASE-3787 at 1/31/13 12:50 AM:
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On region server, we need to keep a map from row key to set of nonce's, per
table, which reflect client requests the server has seen.
We can set time bound on how long such mapping should be kept so that this map
doesn't consume too much heap. This implies associating nonce with the
timestamp when request containing the nonce was received.
was (Author: [email protected]):
On region server, we need to keep a map from row key to set of nounce's,
per table, which reflect client requests the server has seen.
We can set time bound on how long such mapping should be kept so that this map
doesn't consume too much heap. This implies associating nounce with the
timestamp when request containing the nounce was received.
> 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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