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https://issues.apache.org/jira/browse/HBASE-1780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12748318#action_12748318
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Mathias Herberts commented on HBASE-1780:
-----------------------------------------
I think we should specify somewhere that HTable instances are not safe to use
in MT environments for writes.
The manipulation of writebuffer could could lead to
ConcurrentModificationException being raised if Puts are added to it while the
new write buffer size is computed in flushCommits.
> HTable.flushCommits clears write buffer in finally clause
> ---------------------------------------------------------
>
> Key: HBASE-1780
> URL: https://issues.apache.org/jira/browse/HBASE-1780
> Project: Hadoop HBase
> Issue Type: Bug
> Components: client
> Environment: All
> Reporter: Mathias Herberts
> Fix For: 0.20.1, 0.21.0
>
> Attachments: HBASE-1780.patch
>
>
> Metthod flushCommits clears the write buffer in a finally clause.
> When using the write buffer, if the call to processBatchOfRows done in
> flushCommits throws an exception, the write buffer will be cleared thus
> potentially leading to loss of data on the client side.
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