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Learning YARN by Shrey Mehrotra, Akhil Arora

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MapReduce ApplicationMaster REST APIs

MapReduce ApplicationMaster REST APIs provide information about the running ApplicationMaster service. As mentioned in the earlier chapters, MapReduce ApplicationMaster is an application-specific service that manages execution of MapReduce job over a Hadoop-YARN cluster.

The URI format of MapReduce ApplicationMaster REST services is:

http://<proxy http address:port>/proxy/{appid}/ws/v1/mapreduce

Note

MapReduce ApplicationMaster REST APIs are accessed using a proxy server, that is, Web Application Proxy server. Proxy server is an optional service in YARN. An administrator can configure the service to run on a particular host or on the ResourceManager itself (stand-alone mode). If the proxy server is not configured, ...

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