CODEWITHSUNDEEP
hadoopmapreduce
Ashish Sharma
Ashish Sharma

Reputation: 1635

Restart task tracker and job tracker service (task tracker and job tracker) in CDH4

How do I restart the task trackers and job tracker using CDH4 from the command line?

I tried following given script but got error

[root@adc1210765 bin]# ./stop-mapred.sh /usr/lib/hadoop-0.20-mapreduce/bin/../conf no jobtracker to stop cat: /usr/lib/hadoop-0.20-mapreduce/bin/../conf/slaves: No such file or directory

I want to restart all instance of tasktracker running at my cluster nodes

Upvotes: 0

Views: 7070

Answers (2)

WR10
WR10

Reputation: 443

You can also try starting the JobTracker Daemon by

/etc/init.d/hadoop-0.20-mapreduce-jobtracker start

and Task Tracker by

/etc/init.d/hadoop-0.20-mapreduce-tasktracker start

Ensure the version number is appropiate.

Upvotes: 0

Dan Ciborowski - MSFT
Dan Ciborowski - MSFT

Reputation: 7207

You must do this on each of the task trackers

sudo service hadoop-0.20-mapreduce-tasktracker restart

And on the job tracker

sudo service hadoop-0.20-mapreduce-jobtracker restart

You can also use stop and start in place of restart. Might have to change your hadoop version number.

http://www.cloudera.com/content/cloudera-content/cloudera-docs/CDH4/latest/CDH4-Installation-Guide/cdh4ig_topic_11_3.html?scroll=topic_11_3

Upvotes: 1

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