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From "John Sichi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2535) split hostname format should be consistent with tasktracker for locality
Date Wed, 12 May 2010 03:19:41 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12866438#action_12866438

John Sichi commented on HBASE-2535:

Tweaking TableInputFormatBase.getSplits to return the regionLocation with a trailing dot fixes
this, but the real fix involves using the same calls that the tasktracker does for coming
up with its hostname (since I'm guessing that the presence of the trailing dot there may be

> split hostname format should be consistent with tasktracker for locality
> ------------------------------------------------------------------------
>                 Key: HBASE-2535
>                 URL: https://issues.apache.org/jira/browse/HBASE-2535
>             Project: Hadoop HBase
>          Issue Type: Improvement
>          Components: mapred, mapreduce
>    Affects Versions: 0.20.4
>            Reporter: John Sichi
> I was running a mapreduce job (via Hive) against HBase, and noticed that I wasn't getting
any locality (the input split location and the task tracker machine in the job tracker UI
were always different, and "Rack-local map tasks" in the job counters was 0).
> I tracked this down to a discrepancy in the way hostnames were being compared.
> The task tracker detail had a Host like
> /f/s/
> (with trailing dot)
> But the Input Split Location had
> /f/s/
> (without trailing dot)

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