Hadoop provides a job command to interact with map reducers, using which the administrator can control the jobs or tasks submitted to the cluster.
The
<options>part ofhadoop job <options>is explained in the following table:Option
Description
-listThis command lists all the running jobs in a cluster. This is for MapReduce version 1.
-list allThis command lists all the jobs in a cluster.
-status <job-id>This gives information about the job counter and the MapReduce completion percentage.
-kill <job-id>Using this command, we can kill the long-running or stuck jobs.
-historyGives details about the job, in terms of failed or successful tasks.
hadoop jobtracker -dumpConfiguration: This command is used to dump the JobTracker configuration along with all the queue information. This can be really helpful in doing a quick review of the configuration or as a backup.