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A split-brain situation (also known as a network partition situation) occurs when a failure in the network caused the nodes to split into two different networks. This usually occurs in environments where the network is not stable. If this situation occurs in a two-node minimum high availability cluster, it divides into two networks, and each node functions as a leader. This has the following results:
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- First, start the two existing DAS nodes of the cluster. For more information about the expected results, see see Configuring a Minimum High Availability Deployment for WSO2 DAS 3.1.0 - Starting the Cluster.
Start the dummy DAS node as the last node of the 3-node DAS cluster by issuing the following command from
<DAS_HOME>.
./bin/wso2server.sh -DdisableAnalyticsEngine=true -DdisableAnalyticsExecution=true -DdisableIndexing=true -DdisableDataPurging=true -DdisableAnalyticsSparkCtx=true -DdisableAnalyticsStats=true -DdisableMl=true -DdisableEventSink=true start
Once the node has successfully started, a log similar to the following is logged in the CLI of each existing DAS node.Code Block INFO {org.wso2.carbon.core.clustering.hazelcast.wka.WKABasedMembershipScheme} - Member joined [<uuid>]: /<ip>:<port>
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