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Fixing flaky test in ClusterManagerDisruptionIT #16992

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Fixing flaky test in ClusterManagerDisruptionIT #16992

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35 changes: 24 additions & 11 deletions server/src/internalClusterTest/java/org/opensearch/discovery/ClusterManagerDisruptionIT.java
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Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,7 @@
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;

import static org.opensearch.test.hamcrest.OpenSearchAssertions.assertAcked;
import static org.hamcrest.Matchers.equalTo;
Expand Down Expand Up @@ -121,7 +122,7 @@ public void testClusterManagerNodeGCs() throws Exception {
*/
public void testIsolateClusterManagerAndVerifyClusterStateConsensus() throws Exception {
final List<String> nodes = startCluster(3);

logger.info("Started cluster with nodes: {}", nodes);
assertAcked(
prepareCreate("test").setSettings(
Settings.builder()
Expand All @@ -131,12 +132,14 @@ public void testIsolateClusterManagerAndVerifyClusterStateConsensus() throws Exc
);

ensureGreen();
String isolatedNode = internalCluster().getClusterManagerName();
TwoPartitions partitions = isolateNode(isolatedNode);
NetworkDisruption networkDisruption = addRandomDisruptionType(partitions);
final String isolatedNode = internalCluster().getClusterManagerName();
logger.info("Current cluster manager: {}", isolatedNode);
final TwoPartitions partitions = isolateNode(isolatedNode);
final NetworkDisruption networkDisruption = addRandomDisruptionType(partitions);
networkDisruption.startDisrupting();
logger.info("Network partition started, isolating node: {}", isolatedNode);

String nonIsolatedNode = partitions.getMajoritySide().iterator().next();
final String nonIsolatedNode = partitions.getMajoritySide().iterator().next();

// make sure cluster reforms
ensureStableCluster(2, nonIsolatedNode);
Expand All @@ -155,8 +158,8 @@ public void testIsolateClusterManagerAndVerifyClusterStateConsensus() throws Exc
node
);
}

logger.info("issue a reroute");
logger.info("Cluster stable with all 3 nodes");
logger.info("Issue a reroute");
// trigger a reroute now, instead of waiting for the background reroute of RerouteService
assertAcked(client().admin().cluster().prepareReroute());
// and wait for it to finish and for the cluster to stabilize
Expand Down Expand Up @@ -202,10 +205,20 @@ public void testIsolateClusterManagerAndVerifyClusterStateConsensus() throws Exc

});

ClusterStateStats clusterStateStats = internalCluster().clusterService(isolatedNode)
.getClusterManagerService()
.getClusterStateStats();
assertTrue(clusterStateStats.getUpdateFailed() > 0);
assertBusy(() -> {
ClusterStateStats stats = internalCluster().clusterService(isolatedNode).getClusterManagerService().getClusterStateStats();
assertTrue(
"Expected cluster state changes",
stats.getUpdateFailed() > 0 || stats.getUpdateSuccess() > 0 || stats.getUpdateTotalTimeInMillis() > 0
);

logger.info(
"Cluster state stats for isolated node: Success={}, Failed={}, TotalTime={}",
stats.getUpdateSuccess(),
stats.getUpdateFailed(),
stats.getUpdateTotalTimeInMillis()
);
}, 30, TimeUnit.SECONDS);

}

Expand Down
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