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ZenUnicastDiscoveryTestsMinimumMasterNodes.java
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ZenUnicastDiscoveryTestsMinimumMasterNodes.java
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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.discovery;
import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.common.Priority;
import org.elasticsearch.common.settings.ImmutableSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.util.concurrent.AtomicArray;
import org.elasticsearch.test.ElasticsearchIntegrationTest;
import org.elasticsearch.test.ElasticsearchIntegrationTest.ClusterScope;
import org.elasticsearch.test.ElasticsearchIntegrationTest.Scope;
import org.junit.Test;
import java.util.concurrent.CountDownLatch;
import static org.hamcrest.Matchers.equalTo;
@ClusterScope(scope=Scope.TEST, numNodes=0)
public class ZenUnicastDiscoveryTestsMinimumMasterNodes extends ElasticsearchIntegrationTest {
@Test
// Without the 'include temporalResponses responses to nodesToConnect' improvement in UnicastZenPing#sendPings this
// test fails, because 2 nodes elect themselves as master and the health request times out b/c waiting_for_nodes=3
// can't be satisfied.
public void testUnicastDiscovery() throws Exception {
final Settings settings = ImmutableSettings.settingsBuilder()
.put("discovery.zen.ping.multicast.enabled", false)
.put("discovery.zen.minimum_master_nodes", 2)
.put("discovery.zen.ping.unicast.hosts", "localhost")
.put("transport.tcp.port", "25400-25500") // Need to use custom tcp port range otherwise we collide with the shared cluster
.build();
final CountDownLatch latch = new CountDownLatch(3);
final AtomicArray<String> nodes = new AtomicArray<>(3);
Runnable r1 = new Runnable() {
@Override
public void run() {
logger.info("--> start first node");
nodes.set(0, cluster().startNode(settings));
latch.countDown();
}
};
new Thread(r1).start();
sleep(between(500, 3000));
Runnable r2 = new Runnable() {
@Override
public void run() {
logger.info("--> start second node");
nodes.set(1, cluster().startNode(settings));
latch.countDown();
}
};
new Thread(r2).start();
sleep(between(500, 3000));
Runnable r3 = new Runnable() {
@Override
public void run() {
logger.info("--> start third node");
nodes.set(2, cluster().startNode(settings));
latch.countDown();
}
};
new Thread(r3).start();
latch.await();
ClusterHealthResponse clusterHealthResponse = client().admin().cluster().prepareHealth().setWaitForEvents(Priority.LANGUID).setWaitForNodes("3").execute().actionGet();
assertThat(clusterHealthResponse.isTimedOut(), equalTo(false));
DiscoveryNode masterDiscoNode = null;
for (String node : nodes.toArray(new String[3])) {
ClusterState state = cluster().client(node).admin().cluster().prepareState().setLocal(true).execute().actionGet().getState();
assertThat(state.nodes().size(), equalTo(3));
if (masterDiscoNode == null) {
masterDiscoNode = state.nodes().masterNode();
} else {
assertThat(masterDiscoNode.equals(state.nodes().masterNode()), equalTo(true));
}
}
}
}