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()}}. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.