Hadoop 3 API Changes
Summarizes the API changes introduced in Hadoop 3.
EEP 9.0.0 supports Hadoop 3 for use with release
7.1.0. The following table describes command changes that accompany Hadoop 3:
Notes | See for more information . . . |
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Even though EEP 9.0.0 includes Hadoop 3, the Hadoop 2 commands continue to be supported. | Supported Commands for Hadoop |
Hadoop 3 includes a new package for metrics instrumentation:
org.apache.hadoop.metrics2 replaces the previous package,
org.apache.hadoop.metrics . |
Package org.apache.hadoop.metrics2 |
The mapreduce and jhs APIs are unchanged in Hadoop 3. | N/A |
The YARN Application Timeline Service (ATS v2) has a new API. Because ATS v2 was not supported for Hadoop 2, this API is completely new. | YARN Timeline Service v2 |
The Resource Manager (RM) has a new endpoint. | ResourceManager REST APIs |
The Node Manager (NM) has a new auxiliary services endpoint. | NodeManager REST APIs |