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From "Jaimin D Jetly (JIRA)" <>
Subject [jira] [Commented] (AMBARI-3587) Reassign Master (non-secure): JobTracker reassignment does not need manual step.
Date Thu, 24 Oct 2013 23:29:05 GMT


Jaimin D Jetly commented on AMBARI-3587:

Patch integrated to trunk.

> Reassign Master (non-secure): JobTracker reassignment does not need manual step.
> --------------------------------------------------------------------------------
>                 Key: AMBARI-3587
>                 URL:
>             Project: Ambari
>          Issue Type: Task
>          Components: client
>    Affects Versions: 1.4.2
>            Reporter: Jaimin D Jetly
>            Assignee: Jaimin D Jetly
>             Fix For: 1.4.2
>         Attachments: AMBARI-3587.patch, Reassign master JobTracker.png
> On manual step for JobTracker reassignment (non-secure cluster), We ask for copying content
of directories listed in _mapred.local.dir_ property of mapred-site.xml to newly assigned
JobTracker host. Apart from sub-directory _jobTracker_ inside the directory path stated by
_mapred.local.dir_ property , all other sub-directories  are used by TaskTracker and are never
accessed by JobTracker. 
> JobTracker creates job configuration xml file and it's CRC file for a running job inside
 <mapred.local.dir value>/jobTracker directory. These are *temporary files* which are
created when job starts and deleted after the job is completed.
> I was able to successfully reassign JobTracker without executing manual step in the wizard.
Smoke test for all services passed successfully on the last step of the wizard. 
> *As a resolution to this ticket, We need to remove Manual commands step (Reassign master
JobTracker.png) from JobTracker reassignment  wizard in non-secure setup.*
> Note: JobTracker Log directories are useful source of information that a user might want
to copy to the target host but it's not a mandatory step and can be a part of ambari docs.

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