[jira] [Created] (YARN-1228) Don't allow other file than fair-scheduler.xml to be Fair Scheduler allocations file

["Sandy Ryza (JIRA)" <ji...@apache.org>]

Sandy Ryza created YARN-1228:
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             Summary: Don't allow other file than fair-scheduler.xml to be Fair Scheduler allocations file
                 Key: YARN-1228
                 URL: https://issues.apache.org/jira/browse/YARN-1228
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: scheduler
    Affects Versions: 2.1.1-beta
            Reporter: Sandy Ryza


Currently the Fair Scheduler is configured in two ways
* An allocations file that has a different format than the standard Hadoop configuration file, which makes it easier to specify hierarchical objects like queues and their properties. 
* With properties like yarn.scheduler.fair.max.assign that are specified in the standard Hadoop configuration format.

The standard and default way of configuring it is to use fair-scheduler.xml as the allocations file and to put the yarn.scheduler properties in yarn-site.xml.

It is also possible to specify a different file as the allocations file, and to place the yarn.scheduler properties in fair-scheduler.xml, which will be interpreted as in the standard Hadoop configuration format.  This flexibility is both confusing and unnecessary.  There's no need to keep around the second way.


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