[jira] [Resolved] (MAPREDUCE-958) TT should bail out early when mapred.job.tracker is bound to 0:0:0:0

["Allen Wittenauer (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAPREDUCE-958?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Allen Wittenauer resolved MAPREDUCE-958.
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    Resolution: Incomplete

This is probably stale, especially with HARM.

> TT should bail out early when mapred.job.tracker is bound to 0:0:0:0
> --------------------------------------------------------------------
>
>                 Key: MAPREDUCE-958
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-958
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>    Affects Versions: 0.21.0
>            Reporter: Steve Loughran
>
> It's OK for your job tracker's config to tells the JobTracker to come up on port 0:0:0:0, but its not OK for the TaskTrackers to get the same mapred.job.tracker configuration value, as it stops the TT from being able to report its heartbeat.
> This misconfiguration surfaces in the TT's {{offerService()}} routine catching and logging a ConnectionRefused exception every time it tries to heartbeat. Now we have improved the error message in such a situation, it is still a bit late in the process to encounter a problem which should be obvious the moment the TT looks at its configuration.
> Better to have the TT refuse to start up if {{jobTrackAddr.getAddress().isAnyLocalAddress()}}. 



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