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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7693) Hostname returned by TableInputFormatBase.reverseDNS contains trailing period
Date Mon, 28 Jan 2013 18:41:14 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13564501#comment-13564501
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Lars Hofhansl commented on HBASE-7693:
--------------------------------------

Can that is crucial for 0.94... I'll commit this now. Thanks again for the finding and patch.
                
> Hostname returned by TableInputFormatBase.reverseDNS contains trailing period
> -----------------------------------------------------------------------------
>
>                 Key: HBASE-7693
>                 URL: https://issues.apache.org/jira/browse/HBASE-7693
>             Project: HBase
>          Issue Type: Bug
>          Components: mapreduce
>    Affects Versions: 0.94.3
>            Reporter: Robert Dyer
>            Assignee: Robert Dyer
>            Priority: Trivial
>             Fix For: 0.96.0
>
>         Attachments: HBASE-7693.patch
>
>
> TableInputFormatBase.reverseDNS makes a call to org.apache.hadoop.net.DNS.reverseDns
which (at least in Hadoop 1.0.4) returns a PTR record.  PTR records contain a trailing period,
which then shows up in the input split location causing the JobTracker to incorrectly match
map jobs to data-local map slots.

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