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Start TASKTRACKER and JOBTRACKER services from command line

Question asked by ashish on May 5, 2013
Latest reply on Jun 17, 2015 by robin.tanner
Hi ,
I have a 3 nodes cluster with hadoop running on them. Every time i ran some test cases i made some changes in mapred-site.xml, so I need to restart tasktracker and job tracker before running the test.
I want to know how we can do that from command line, so that i can automate this step.
I donot want to restart from web url.
I am using CDH4 for hadoop
There is no start*.sh under /usr/lib/hadoop directory