6.2. Downgrade the YARN NodeManager

Stop the NodeManager process, switch versions, and restart the NodeManager:

  1. Shut down the current NodeManager process, switch to the previous version, and start the NodeManager process:

    su – yarn "/usr/hdp/current/hadoop-yarn-nodemanager/sbin/yarn-daemon.sh stop nodemanager"

    hdp-select set hadoop-yarn-nodemanager

    su – yarn -c "/usr/hdp/current/hadoop-yarn-nodemanager/sbin/yarn-daemon.sh start nodemanager"

  2. To verify that the NodeManager joined the cluster, check the status of the node:

    yarn node –list

    Make sure the node is listed as running. For example:

    [yarn@node-1 ~]$ yarn node -list
    15/02/24 18:17:20 INFO impl.TimelineClientImpl: Timeline service address: http://node-1.example.com:8188/ws/v1/timeline/
    15/02/24 18:17:20 INFO client.RMProxy: Connecting to ResourceManager at node-1.example.com/
    Total Nodes:1
    Node-Id                  Node-State Node-Http-Address         Number-of-Running-Containers
    node-1.example.com:45454 RUNNING    node-1.example.com:50060  0

Continue with the next downgrade step.

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