QueueManager should issue warning if mapred-queues.xml is skipped.
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Key: MAPREDUCE-1527
URL: https://issues.apache.org/jira/browse/MAPREDUCE-1527
Project: Hadoop Map/Reduce
Issue Type: Improvement
Reporter: Hong Tang
MAPREDUCE-861 added support for hierarchical queues and used a new file
mapred-queues.xml to configure queues. But the QueueManager will silently skip
the file if property "mapred.queue.names" is defined in Configuration. This
tripped us when we are testing MAPREDUCE-1235 and copied configuration files
from a Hadoop 0.20 cluster.
I suggest QueueManager issue a friendly warning if both of the following are
true: (1) "mapred.queue.names" exists in Configuration; (2) "mapred-queues.xml"
is found in the classpath.
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