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Date: Tue, 3 Sep 2013 21:59:52 +0000 (UTC)
From: "Elliott Clark (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12666755.1378242185708.74043.1378245592180@arcas>
In-Reply-To: <JIRA.12666755.1378242185708@arcas>
References: <JIRA.12666755.1378242185708@arcas>
Subject: [jira] [Commented] (HBASE-9422) AsyncProcess and HTable will submit
 the same mutation twice if there is an error locating region.
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    [ https://issues.apache.org/jira/browse/HBASE-9422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13757134#comment-13757134 ] 

Elliott Clark commented on HBASE-9422:
--------------------------------------

Yeah it's not even that big a deal as it is.  Just something I noticed while trying to dig into the client.

Thanks.
                
> AsyncProcess and HTable will submit the same mutation twice if there is an error locating region.
> -------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-9422
>                 URL: https://issues.apache.org/jira/browse/HBASE-9422
>             Project: HBase
>          Issue Type: Bug
>          Components: Client
>    Affects Versions: 0.98.0, 0.96.0
>            Reporter: Elliott Clark
>            Assignee: Nicolas Liochon
>            Priority: Minor
>
> HTable#backgroundFlushCommits calls AsyncProcess#submit
> AsyncProcess#submit tries to get the region location but doesn't remove the mutation from the write buffer.  If it doesn't get the location the mutation is added to the error list.
> then HTable#backgroundFlushCommits takes all mutations from the error list and adds them to the write buffer list.
> This should result in two references to the same mutation being in the write buffer list twice.  It's not a big deal as two of the same mutation being executed should be ideponent (unless the two puts are executed across ms boundaries.)

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