How to determine the master node?
Written By
Orsolya Hegedus
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Issue
- I am running a clustered environment, and I would like to know whether the node I am currently on is the master node.
Resolution
- Liferay doesn't have a fixed “master” node in the traditional sense. Instead, it uses a distributed architecture where nodes cooperate to handle requests.
However, there are concepts of “master” and “slave” nodes in specific contexts, such as job scheduling or cluster management.
- To check if a node is the master for job scheduling, you can use the following Groovy script (multiple options):
import com.liferay.portal.kernel.cluster.*;
out.println("** Master: "+ ClusterMasterExecutorUtil.isMaster());
out.println(com.liferay.portal.kernel.cluster.ClusterMasterExecutorUtil.isMaster());
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