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Fix Flaky Test SpecificClusterManagerNodesIT.testElectOnlyBetweenClusterManagerNodes #16021

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Fix Flaky Test SpecificClusterManagerNodesIT.testElectOnlyBetweenClusterManagerNodes #16021

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32 changes: 19 additions & 13 deletions ...er/src/internalClusterTest/java/org/opensearch/cluster/SpecificClusterManagerNodesIT.java
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,7 @@
import org.opensearch.test.OpenSearchIntegTestCase.Scope;

import java.io.IOException;
import java.util.function.Supplier;

import static org.opensearch.test.NodeRoles.clusterManagerNode;
import static org.opensearch.test.NodeRoles.dataOnlyNode;
Expand Down Expand Up @@ -255,19 +256,24 @@ public void testElectOnlyBetweenClusterManagerNodes() throws Exception {
client().execute(AddVotingConfigExclusionsAction.INSTANCE, new AddVotingConfigExclusionsRequest(clusterManagerNodeName)).get();
// removing the cluster-manager from the voting configuration immediately triggers the cluster-manager to step down
assertBusy(() -> {
assertThat(
internalCluster().nonClusterManagerClient()
.admin()
.cluster()
.prepareState()
.execute()
.actionGet()
.getState()
.nodes()
.getClusterManagerNode()
.getName(),
equalTo(nextClusterManagerEligableNodeName)
);
Supplier<String> clusterManagerName = () -> {
try {
return internalCluster().nonClusterManagerClient()
.admin()
.cluster()
.prepareState()
.execute()
.actionGet()
.getState()
.nodes()
.getClusterManagerNode()
.getName();
} catch (Exception e) {
logger.debug("failed to get cluster-manager name", e);
return null;
}
};
assertThat(clusterManagerName.get(), equalTo(nextClusterManagerEligableNodeName));
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So if we swallow the NPE with the try/catch above, won't this test still fail on the assertion here since clusterManagerName.get() would be null and nextClusterManagerEligableNodeName shouldn't be null?

assertThat(
internalCluster().clusterManagerClient()
.admin()
Expand Down
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