-
Notifications
You must be signed in to change notification settings - Fork 24.6k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Added test with AwaitsFix annotation that simulates a split brain.
- Loading branch information
Showing
1 changed file
with
145 additions
and
0 deletions.
There are no files selected for viewing
145 changes: 145 additions & 0 deletions
145
src/test/java/org/elasticsearch/discovery/DiscoveryWithNetworkFailuresTests.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,145 @@ | ||
/* | ||
* 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 com.google.common.base.Predicate; | ||
import org.apache.lucene.util.LuceneTestCase; | ||
import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse; | ||
import org.elasticsearch.client.Client; | ||
import org.elasticsearch.cluster.ClusterState; | ||
import org.elasticsearch.cluster.node.DiscoveryNode; | ||
import org.elasticsearch.cluster.node.DiscoveryNodes; | ||
import org.elasticsearch.common.Priority; | ||
import org.elasticsearch.common.settings.ImmutableSettings; | ||
import org.elasticsearch.common.settings.Settings; | ||
import org.elasticsearch.test.ElasticsearchIntegrationTest; | ||
import org.elasticsearch.test.transport.MockTransportService; | ||
import org.elasticsearch.transport.TransportModule; | ||
import org.elasticsearch.transport.TransportService; | ||
import org.junit.Test; | ||
|
||
import java.util.Arrays; | ||
import java.util.List; | ||
|
||
import static org.elasticsearch.test.ElasticsearchIntegrationTest.ClusterScope; | ||
import static org.elasticsearch.test.ElasticsearchIntegrationTest.Scope; | ||
import static org.hamcrest.Matchers.*; | ||
|
||
/** | ||
*/ | ||
@ClusterScope(scope= Scope.SUITE, numNodes=0) | ||
public class DiscoveryWithNetworkFailuresTests extends ElasticsearchIntegrationTest { | ||
|
||
@Test | ||
@LuceneTestCase.AwaitsFix(bugUrl = "https://github.com/elasticsearch/elasticsearch/issues/2488") | ||
public void failWithMinimumMasterNodesConfigured() throws Exception { | ||
final Settings settings = ImmutableSettings.settingsBuilder() | ||
.put("discovery.zen.minimum_master_nodes", 2) | ||
.put("discovery.zen.fd.ping_timeout", "1s") // <-- for hitting simulated network failures quickly | ||
.put(TransportModule.TRANSPORT_SERVICE_TYPE_KEY, MockTransportService.class.getName()) | ||
.build(); | ||
List<String>nodes = cluster().startNodesAsync(3, settings).get(); | ||
|
||
// Wait until a green status has been reaches and 3 nodes are part of the cluster | ||
List<String> nodesList = Arrays.asList(nodes.toArray(new String[3])); | ||
ClusterHealthResponse clusterHealthResponse = client().admin().cluster().prepareHealth() | ||
.setWaitForEvents(Priority.LANGUID) | ||
.setWaitForNodes("3") | ||
.get(); | ||
assertThat(clusterHealthResponse.isTimedOut(), is(false)); | ||
|
||
// Figure out what is the elected master node | ||
DiscoveryNode masterDiscoNode = null; | ||
for (String node : nodesList) { | ||
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(state.nodes().masterNode(), equalTo(masterDiscoNode)); | ||
} | ||
} | ||
assert masterDiscoNode != null; | ||
logger.info("---> legit elected master node=" + masterDiscoNode); | ||
final Client masterClient = cluster().masterClient(); | ||
|
||
// Everything is stable now, it is now time to simulate evil... | ||
|
||
// Pick a node that isn't the elected master. | ||
String unluckyNode = null; | ||
for (String node : nodesList) { | ||
if (!node.equals(masterDiscoNode.getName())) { | ||
unluckyNode = node; | ||
} | ||
} | ||
assert unluckyNode != null; | ||
|
||
// Simulate a network issue between the unlucky node and elected master node in both directions. | ||
addFailToSendNoConnectRule(masterDiscoNode.getName(), unluckyNode); | ||
addFailToSendNoConnectRule(unluckyNode, masterDiscoNode.getName()); | ||
try { | ||
// Wait until elected master has removed that the unlucky node... | ||
awaitBusy(new Predicate<Object>() { | ||
@Override | ||
public boolean apply(Object input) { | ||
return masterClient.admin().cluster().prepareState().setLocal(true).get().getState().nodes().size() == 2; | ||
} | ||
}); | ||
|
||
// The unlucky node must report *no* master node, since it can't connect to master and in fact it should | ||
// continuously ping until network failures have been resolved. | ||
Client isolatedNodeClient = cluster().client(unluckyNode); | ||
ClusterState localClusterState = isolatedNodeClient.admin().cluster().prepareState().setLocal(true).get().getState(); | ||
DiscoveryNodes localDiscoveryNodes = localClusterState.nodes(); | ||
assertThat(localDiscoveryNodes.masterNode(), nullValue()); | ||
} finally { | ||
// stop simulating network failures, from this point on the unlucky node is able to rejoin | ||
// We also need to do this even if assertions fail, since otherwise the test framework can't work properly | ||
clearNoConnectRule(masterDiscoNode.getName(), unluckyNode); | ||
clearNoConnectRule(unluckyNode, masterDiscoNode.getName()); | ||
} | ||
|
||
// Wait until the master node sees all 3 nodes again. | ||
clusterHealthResponse = masterClient.admin().cluster().prepareHealth() | ||
.setWaitForEvents(Priority.LANGUID) | ||
.setWaitForNodes("3") | ||
.get(); | ||
assertThat(clusterHealthResponse.isTimedOut(), is(false)); | ||
|
||
for (String node : nodesList) { | ||
ClusterState state = cluster().client(node).admin().cluster().prepareState().setLocal(true).execute().actionGet().getState(); | ||
assertThat(state.nodes().size(), equalTo(3)); | ||
// The elected master shouldn't have changed, since the unlucky node never could have elected himself as | ||
// master since m_m_n of 2 could never be satisfied. | ||
assertThat(state.nodes().masterNode(), equalTo(masterDiscoNode)); | ||
} | ||
} | ||
|
||
private void addFailToSendNoConnectRule(String fromNode, String toNode) { | ||
TransportService mockTransportService = cluster().getInstance(TransportService.class, fromNode); | ||
((MockTransportService) mockTransportService).addFailToSendNoConnectRule(cluster().getInstance(Discovery.class, toNode).localNode()); | ||
} | ||
|
||
private void clearNoConnectRule(String fromNode, String toNode) { | ||
TransportService mockTransportService = cluster().getInstance(TransportService.class, fromNode); | ||
((MockTransportService) mockTransportService).clearRule(cluster().getInstance(Discovery.class, toNode).localNode()); | ||
} | ||
|
||
} |