After you add, modify, or remove the configuration items of a service in an E-MapReduce (EMR) cluster, you can roll back the configurations of the service. This topic describes how to roll back the configuration item settings of a service in the EMR console.
Prerequisites
The configurations of a service are modified.
Procedure
Go to the Services tab.
Log on to the EMR console.
In the top navigation bar, select the region where your cluster resides and select a resource group based on your business requirements.
On the EMR on ECS page, find the desired cluster and click Services in the Actions column.
Click Configure for the HDFS service.
The HDFS service is used as an example in this topic.
On the Configure tab, click Configuration Modification History.
The dialog box displays the changes that were made to the service configurations.
In the Configuration Modification History dialog box, find the desired configuration item and click Roll Back in the Actions column.
In the Roll Back message, click OK.