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https://issues.apache.org/jira/browse/HBASE-6390?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Purtell resolved HBASE-6390.
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Resolution: Duplicate
Dup of HBASE-3787
> append() and increment() may result in inconsistent result on retries.
> ----------------------------------------------------------------------
>
> Key: HBASE-6390
> URL: https://issues.apache.org/jira/browse/HBASE-6390
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.94.0, 0.96.0
> Reporter: Ashutosh Jindal
>
> append() and increment() api can give inconsistent result in following
> scenarios :
> 1- For eg, if the client does not receive the response in the specified time,
> it retries. Now the first call to increment/append is already done and this
> retry will again make the operation to succeed.
> 2- Now if the sync() to WAL fails we get an IOException, on getting an
> exception there is a retry done which again results in the doing the
> increment/append again.
> When may need some sort of roll back for the second problem.
> For the first one we need to see how to handle this.
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