Enabling Oozie High Availability (HA)

Scenario

When multiple Oozie nodes provide services at the same time, you can use ZooKeeper to provide high availability (HA), which helps avoid single points of failure (SPOFs) and prevent multiple nodes from concurrently processing the same task.

Impact on the System

Enabling Oozie HA requires an Oozie restart, and Oozie cannot provide services during the restart.

Prerequisites

• Oozie and ZooKeeper have been installed and are running properly.
• No task is running.
• The current cluster is of the latest version. If it is not, copy the curator-x-discovery-4.2.0.jar package from the $BIGDATA_HOME/FusionInsight_Porter_X.X.X/install/FusionInsight-Oozie-X.X.X/oozie-X.X.X/embedded-oozie-server/webapp/WEB-INF/lib directory to the $BIGDATA_HOME/FusionInsight_Porter_X.X.X/install/FusionInsight-Oozie-X.X.X/oozie-X.X.X/lib directory.

Procedure

1. On FusionInsight Manager, choose Cluster > Services > Oozie. On the displayed page, click the Configurations tab, and then click All Configurations. In the navigation pane, choose Customization under oozie(Role), and add the configuration items listed in the following table for oozie.site.configs. Click Save after the modification. In the displayed dialog box, click OK.

   Parameter	Setting	Description
   oozie.services.ext	org.apache.oozie.service.ZKLocksService,org.apache.oozie.service.ZKXLogStreamingService,org.apache.oozie.service.ZKJobsConcurrencyService,org.apache.oozie.service.ZKUUIDService	Services providing enhanced HA
   oozie.zookeeper.connection.string	ZooKeeper instance service IP address:Port number. Use commas (,) to separate multiple IP address:port pairs.	ZooKeeper connection information
   oozie.zookeeper.namespace	oozie	Oozie path on ZooKeeper
   oozie.zookeeper.secure	Security cluster: true Normal cluster: not required	Whether to enable Kerberos on ZooKeeper.

2. On the Dashboard page of Oozie, click Stop Service in the upper-right corner, and select Restart Service to restart Oozie.