| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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.apache.ratis; |
| |
| import org.apache.log4j.Level; |
| import org.apache.ratis.client.RaftClient; |
| import org.apache.ratis.conf.RaftProperties; |
| import org.apache.ratis.server.RaftServer; |
| import org.apache.ratis.server.RaftServerConfigKeys; |
| import org.apache.ratis.server.impl.MiniRaftCluster; |
| import org.apache.ratis.server.simulation.MiniRaftClusterWithSimulatedRpc; |
| import org.apache.ratis.proto.RaftProtos; |
| import org.apache.ratis.statemachine.SimpleStateMachine4Testing; |
| import org.apache.ratis.statemachine.StateMachine; |
| import org.apache.ratis.util.Log4jUtils; |
| import org.apache.ratis.util.TimeDuration; |
| import org.junit.After; |
| import org.junit.Assert; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import java.io.IOException; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Test Raft Server Leader election timeout detection and notification to state machine. |
| */ |
| public class TestRaftServerNoLeaderTimeout extends BaseTest { |
| static { |
| Log4jUtils.setLogLevel(RaftServer.Division.LOG, Level.DEBUG); |
| Log4jUtils.setLogLevel(RaftClient.LOG, Level.DEBUG); |
| } |
| |
| private static final int NUM_SERVERS = 3; |
| |
| private static final RaftProperties properties = new RaftProperties(); |
| |
| private final MiniRaftClusterWithSimulatedRpc cluster = MiniRaftClusterWithSimulatedRpc |
| .FACTORY.newCluster(NUM_SERVERS, getProperties()); |
| |
| private static RaftProperties getProperties() { |
| RaftServerConfigKeys.Notification.setNoLeaderTimeout(properties, TimeDuration.valueOf(1, TimeUnit.SECONDS)); |
| properties.setClass(MiniRaftCluster.STATEMACHINE_CLASS_KEY, |
| SimpleStateMachine4Testing.class, StateMachine.class); |
| return properties; |
| } |
| |
| @Before |
| public void setup() throws IOException { |
| Assert.assertNull(cluster.getLeader()); |
| cluster.start(); |
| } |
| |
| @After |
| public void tearDown() { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| |
| @Test |
| public void testLeaderElectionDetection() throws Exception { |
| RaftTestUtil.waitForLeader(cluster); |
| final TimeDuration noLeaderTimeout = RaftServerConfigKeys.Notification.noLeaderTimeout(cluster.getProperties()); |
| |
| final RaftServer.Division healthyFollower = cluster.getFollowers().get(1); |
| final RaftServer.Division failedFollower = cluster.getFollowers().get(0); |
| // fail the leader and one of the followers to that quorum is not present |
| // for next leader election to succeed. |
| cluster.killServer(failedFollower.getId()); |
| cluster.killServer(cluster.getLeader().getId()); |
| |
| // Wait to ensure that leader election is triggered and also state machine callback is triggered |
| noLeaderTimeout.sleep(); |
| noLeaderTimeout.sleep(); |
| |
| RaftProtos.RoleInfoProto roleInfoProto = |
| SimpleStateMachine4Testing.get(healthyFollower).getLeaderElectionTimeoutInfo(); |
| Assert.assertNotNull(roleInfoProto); |
| |
| Assert.assertEquals(roleInfoProto.getRole(), RaftProtos.RaftPeerRole.CANDIDATE); |
| final long noLeaderTimeoutMs = noLeaderTimeout.toLong(TimeUnit.MILLISECONDS); |
| Assert.assertTrue(roleInfoProto.getCandidateInfo().getLastLeaderElapsedTimeMs() > noLeaderTimeoutMs); |
| } |
| } |