Use the button “Make V3 current” to revert back to version “V3”. Let’s make V3 as the current config to revert back the changes we did earlier in this post. As shown in the example below, we have 2 options: 1. You can revert back to an older config by hovering over the version name. Reverting back to a pervious version config Reverting back to a previous version also creates a new version.Īs you can see in the above screenshot, we have the V4 version with the comment we provided while changing the Config Property. You can revert back to a previous version anytime. Every time you change any config property a new Version is created. You can view the progress is the progress window pop-up.Īmbari keeps track of all the changes made to the Service Config Properties. Please confirm the restart on the pop-up window. We will use the Restart All option to restart all the affected service. Note: Restart All does not mean all the Hadoop services will be restarted rather, only those that use the new property will be restarted. To be safe, the Restart All should be used.
The Restart button provides two options: Restart All and Restart DataNodes. The new property will not take effect until the required services are restarted. Once the new property is changed, an orange Restart button will appear at the top left of the window. For example, I have added the description of the change I made. It is highly recommended that historical notes concerning the change be added to this window. A save/notes window will then be displayed. When the property is changed the “save” button becomes activated. This determines the datanode heartbeat interval in seconds. We will change theĭfs.heartbeat.interval from 3 seconds to 4 seconds. Ambari makes this process easy for us.įor the example in this post, let’s change a Config property for HDFS service. In addition to modifying a large number of properties, making changes to a property often requires restarting daemons (and dependent daemons) across the entire cluster. You would find the Basic and Advanced config properties here.
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