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Why is there a mapreduce.jobtracker.address setting in YARN?

YARN is the second generation of Hadoop that no longer uses the jobtracker daemon and replaces it with a resource manager. But why, does mapred-site.xml hasoop 2 have a property called mapreduce.jobtracker.address?

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You're right. In YARN, jobtracker no longer exists. Therefore, as part of the client configuration, you do not need to specify the property mapreduce.jobtracker.address

. In YARN, you must specify a property mapreduce.framework.name

- yarn

in the config file. Instead of setting mapreduce.jotracker.address, you need to specify yarn.resourcemanager.address

.



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setting yarn.resourcemanager.address is optional:

please refer to the following link which explains the transition from MR1 to MR2



https://www.cloudera.com/documentation/enterprise/5-4-x/topics/cdh_ig_mapreduce_to_yarn_migrate.html

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