Zen2: Add test that checks that CoordinatorTests are reproducible (#37225)
Ensures reproducibility of the tests in CoordinatorTests.
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@ -18,6 +18,7 @@
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*/
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package org.elasticsearch.cluster.coordination;
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import com.carrotsearch.randomizedtesting.RandomizedContext;
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import org.apache.logging.log4j.CloseableThreadContext;
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import org.apache.logging.log4j.LogManager;
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import org.apache.logging.log4j.Logger;
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@ -70,6 +71,7 @@ import java.util.List;
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import java.util.Map;
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import java.util.Optional;
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import java.util.Set;
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import java.util.concurrent.Callable;
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import java.util.concurrent.atomic.AtomicBoolean;
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import java.util.function.Consumer;
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import java.util.function.Function;
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@ -128,6 +130,24 @@ public class CoordinatorTests extends ESTestCase {
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resetPortCounter();
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}
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// check that runRandomly leads to reproducible results
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public void testRepeatableTests() throws Exception {
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final Callable<Long> test = () -> {
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final Cluster cluster = new Cluster(randomIntBetween(1, 5));
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cluster.runRandomly();
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final long afterRunRandomly = value(cluster.getAnyNode().getLastAppliedClusterState());
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cluster.stabilise();
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final long afterStabilisation = value(cluster.getAnyNode().getLastAppliedClusterState());
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return afterRunRandomly ^ afterStabilisation;
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};
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final long seed = randomLong();
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logger.info("First run with seed [{}]", seed);
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final long result1 = RandomizedContext.current().runWithPrivateRandomness(seed, test);
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logger.info("Second run with seed [{}]", seed);
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final long result2 = RandomizedContext.current().runWithPrivateRandomness(seed, test);
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assertEquals(result1, result2);
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}
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public void testCanUpdateClusterStateAfterStabilisation() {
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final Cluster cluster = new Cluster(randomIntBetween(1, 5));
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cluster.runRandomly();
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