Provide a command line option to check if a Hadoop jobtracker is idle
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Key: HADOOP-2266
URL: https://issues.apache.org/jira/browse/HADOOP-2266
Project: Hadoop
Issue Type: New Feature
Components: mapred
Reporter: Hemanth Yamijala
This is an RFE for providing a way to determine from the hadoop command line
whether a jobtracker is idle. One possibility is to have something like hadoop
jobtracker -idle <time>. Hadoop would return true (maybe via some stdout
output) if the jobtracker had no work to do (jobs running / prepared) since
<time> seconds, false otherwise.
This would be useful for management / provisioning systems like
Hadoop-On-Demand [HADOOP-1301], which can then deallocate the idle, provisioned
clusters automatically, and release resources.
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