liuxunorg commented on issue #3397: [ZEPPELIN-4208] Cluster synchronize InterpreterSetting URL: https://github.com/apache/zeppelin/pull/3397#issuecomment-509527599 I added a few test cases that can run several nodes on a server to create a zeppelin cluster. They are ### One zeppelin-sever + Two ClusterManagerServer -> Compose a zeppelin cluster > Can simulate cluster events for zeppelin clusters. https://github.com/apache/zeppelin/blob/master/zeppelin-server/src/test/java/org/apache/zeppelin/cluster/ClusterEventTest.java ### One or Three ClusterManagerServer -> Compose a zeppelin cluster > Metadata test used to check the cluster itself. https://github.com/apache/zeppelin/blob/master/zeppelin-interpreter/src/test/java/org/apache/zeppelin/cluster/ClusterMultiNodeTest.java https://github.com/apache/zeppelin/blob/master/zeppelin-interpreter/src/test/java/org/apache/zeppelin/cluster/ClusterSingleNodeTest.java
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