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https://issues.apache.org/jira/browse/HBASE-7693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13564332#comment-13564332
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Marc Reichman commented on HBASE-7693:
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This is a dupe of HBASE-7618, but maybe HBASE-7618 can be closed since this
contains a 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
> Priority: Trivial
> 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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