4. Upgrading the Stack

This stack upgrade involves removing the HDP 1.x version of MapReduce and replacing it with the HDP 2.x YARN and MapReduce2 components. This process is somewhat long and complex. To help you, a Python script is provided to automate some of the upgrade steps. It is available at /var/lib/ambari-server/resources/scripts/UpgradeHelper_HDP2.py on the Ambari Server host. The script can be executed on any host that can communicate with Ambari Server. It requires Python 2.6 or higher.


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