Parameter Configuration Rollback

Last updated: 2020-02-28 19:40:40

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Operation Scenarios

This document describes how to roll back component parameters to their previous configuration in the EMR Console.

Directions

  1. Log in to the EMR Console and select Component Management on the left sidebar. In the Operation column of the component whose parameters you want to modify, click Configure. Here, taking HDFS as an example, click Configure to proceed to the next step.
  2. Select Configuration History in the top-left corner of the component list to view the configuration history of all components. On this tab, you can roll back to the last parameter configuration. Click Details to view the parameter values before and after the rollback. Select Roll back > OK. After the rollback is successful, the component will be restarted, and the previous configuration will take effect in a short while.