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package org.elasticsearch.action.support.master;
/*
* 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.
*/
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.discovery.DiscoverySettings;
import org.elasticsearch.discovery.zen.elect.ElectMasterService;
import org.elasticsearch.discovery.zen.fd.FaultDetection;
import org.elasticsearch.plugins.Plugin;
import org.elasticsearch.test.ESIntegTestCase;
import org.elasticsearch.test.disruption.NetworkDisconnectPartition;
import org.elasticsearch.test.disruption.NetworkPartition;
import org.elasticsearch.test.transport.MockTransportService;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;
import static org.hamcrest.Matchers.equalTo;
@ESIntegTestCase.ClusterScope(scope = ESIntegTestCase.Scope.TEST, numDataNodes = 0)
@ESIntegTestCase.SuppressLocalMode
public class IndexingMasterFailoverIT extends ESIntegTestCase {
@Override
protected Collection<Class<? extends Plugin>> nodePlugins() {
final HashSet<Class<? extends Plugin>> classes = new HashSet<>(super.nodePlugins());
classes.add(MockTransportService.TestPlugin.class);
return classes;
}
/**
* Indexing operations which entail mapping changes require a blocking request to the master node to update the mapping.
* If the master node is being disrupted or if it cannot commit cluster state changes, it needs to retry within timeout limits.
* This retry logic is implemented in TransportMasterNodeAction and tested by the following master failover scenario.
*/
public void testMasterFailoverDuringIndexingWithMappingChanges() throws Throwable {
logger.info("--> start 4 nodes, 3 master, 1 data");
final Settings sharedSettings = Settings.builder()
.put(FaultDetection.SETTING_PING_TIMEOUT, "1s") // for hitting simulated network failures quickly
.put(FaultDetection.SETTING_PING_RETRIES, "1") // for hitting simulated network failures quickly
.put("discovery.zen.join_timeout", "10s") // still long to induce failures but to long so test won't time out
.put(DiscoverySettings.PUBLISH_TIMEOUT_SETTING.getKey(), "1s") // <-- for hitting simulated network failures quickly
.put(ElectMasterService.DISCOVERY_ZEN_MINIMUM_MASTER_NODES_SETTING.getKey(), 2)
.build();
internalCluster().startMasterOnlyNodesAsync(3, sharedSettings).get();
String dataNode = internalCluster().startDataOnlyNode(sharedSettings);
logger.info("--> wait for all nodes to join the cluster");
ensureStableCluster(4);
// We index data with mapping changes into cluster and have master failover at same time
client().admin().indices().prepareCreate("myindex")
.setSettings(Settings.builder().put("index.number_of_shards", 1).put("index.number_of_replicas", 0))
.get();
ensureGreen("myindex");
final CyclicBarrier barrier = new CyclicBarrier(2);
Thread indexingThread = new Thread(new Runnable() {
@Override
public void run() {
try {
barrier.await();
} catch (InterruptedException e) {
logger.warn("Barrier interrupted", e);
return;
} catch (BrokenBarrierException e) {
logger.warn("Broken barrier", e);
return;
}
for (int i = 0; i < 10; i++) {
// index data with mapping changes
IndexResponse response = client(dataNode).prepareIndex("myindex", "mytype").setSource("field_" + i, "val").get();
assertThat(response.isCreated(), equalTo(true));
}
}
});
indexingThread.setName("indexingThread");
indexingThread.start();
barrier.await();
// interrupt communication between master and other nodes in cluster
String master = internalCluster().getMasterName();
Set<String> otherNodes = new HashSet<>(Arrays.asList(internalCluster().getNodeNames()));
otherNodes.remove(master);
NetworkPartition partition = new NetworkDisconnectPartition(Collections.singleton(master), otherNodes, random());
internalCluster().setDisruptionScheme(partition);
logger.info("--> disrupting network");
partition.startDisrupting();
logger.info("--> waiting for new master to be elected");
ensureStableCluster(3, dataNode);
partition.stopDisrupting();
logger.info("--> waiting to heal");
ensureStableCluster(4);
indexingThread.join();
ensureGreen("myindex");
refresh();
assertThat(client().prepareSearch("myindex").get().getHits().getTotalHits(), equalTo(10L));
}
}
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