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From Doğacan Güney (JIRA) <j...@apache.org>
Subject [jira] Updated: (HBASE-1644) Result.row is cached in getRow; this breaks MapReduce
Date Fri, 10 Jul 2009 21:29:14 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1644?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Doğacan Güney updated HBASE-1644:
---------------------------------

    Attachment: rownull.patch

Patch for the problem.

Also TableInputFormatBase#nextKeyValue reads Result into a temporary result variable then
copies it into value field. AFAICS, there is no point in doing that. So this patch also removes
the local result variable.

> Result.row is cached in getRow; this breaks MapReduce
> -----------------------------------------------------
>
>                 Key: HBASE-1644
>                 URL: https://issues.apache.org/jira/browse/HBASE-1644
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.20.0
>            Reporter: Doğacan Güney
>         Attachments: rownull.patch
>
>
> In Result#getRow row field is computed (if row is null) and then is cached for further
uses. But since MapReduce uses the same Result instance through different map()/reduce() calls,
row field is not updated when Result instance changes.

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