| package org.apache.helix.integration; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.util.ArrayList; |
| import java.util.Date; |
| import java.util.List; |
| |
| import org.apache.helix.BaseDataAccessor; |
| import org.apache.helix.HelixAdmin; |
| import org.apache.helix.HelixDataAccessor; |
| import org.apache.helix.HelixManager; |
| import org.apache.helix.InstanceType; |
| import org.apache.helix.NotificationContext; |
| import org.apache.helix.PropertyKey; |
| import org.apache.helix.TestHelper; |
| import org.apache.helix.zookeeper.datamodel.ZNRecord; |
| import org.apache.helix.ZkUnitTestBase; |
| import org.apache.helix.integration.manager.ClusterControllerManager; |
| import org.apache.helix.manager.zk.ZKHelixAdmin; |
| import org.apache.helix.manager.zk.ZKHelixDataAccessor; |
| import org.apache.helix.manager.zk.ZKHelixManager; |
| import org.apache.helix.manager.zk.ZkBaseDataAccessor; |
| import org.apache.helix.zookeeper.impl.client.ZkClient; |
| import org.apache.helix.model.ExternalView; |
| import org.apache.helix.model.IdealState.RebalanceMode; |
| import org.apache.helix.model.Message; |
| import org.apache.helix.participant.statemachine.StateModel; |
| import org.apache.helix.participant.statemachine.StateModelFactory; |
| import org.apache.helix.participant.statemachine.StateModelInfo; |
| import org.apache.helix.participant.statemachine.Transition; |
| import org.apache.helix.tools.ClusterStateVerifier; |
| import org.apache.helix.tools.ClusterStateVerifier.BestPossAndExtViewZkVerifier; |
| import org.apache.helix.tools.ClusterStateVerifier.ZkVerifier; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| public class TestEntropyFreeNodeBounce extends ZkUnitTestBase { |
| @Test |
| public void testBounceAll() throws Exception { |
| // pick numbers that don't divide evenly |
| final int NUM_PARTICIPANTS = 5; |
| final int NUM_PARTITIONS = 123; |
| final int NUM_REPLICAS = 1; |
| final String RESOURCE_PREFIX = "TestDB"; |
| final String RESOURCE_NAME = RESOURCE_PREFIX + "0"; |
| |
| // create a cluster name based on this test name |
| String className = TestHelper.getTestClassName(); |
| String methodName = TestHelper.getTestMethodName(); |
| String clusterName = className + "_" + methodName; |
| System.out.println("START " + clusterName + " at " + new Date(System.currentTimeMillis())); |
| |
| // Set up cluster |
| TestHelper.setupCluster(clusterName, ZK_ADDR, 12918, // participant port |
| "localhost", // participant name prefix |
| "TestDB", // resource name prefix |
| 1, // resources |
| NUM_PARTITIONS, // partitions per resource |
| NUM_PARTICIPANTS, // number of nodes |
| NUM_REPLICAS, // replicas |
| "OnlineOffline", RebalanceMode.FULL_AUTO, // use FULL_AUTO mode to test node tagging |
| true); // do rebalance |
| |
| // Start the participants |
| HelixManager[] participants = new HelixManager[NUM_PARTICIPANTS]; |
| for (int i = 0; i < NUM_PARTICIPANTS; i++) { |
| final String instanceName = "localhost_" + (12918 + i); |
| participants[i] = createParticipant(clusterName, instanceName); |
| participants[i].connect(); |
| } |
| |
| // Start the controller |
| ClusterControllerManager controller = |
| new ClusterControllerManager(ZK_ADDR, clusterName, "controller"); |
| controller.syncStart(); |
| |
| // get an admin and accessor |
| HelixAdmin helixAdmin = new ZKHelixAdmin(_gZkClient); |
| BaseDataAccessor<ZNRecord> baseAccessor = new ZkBaseDataAccessor<ZNRecord>(_gZkClient); |
| HelixDataAccessor accessor = new ZKHelixDataAccessor(clusterName, baseAccessor); |
| PropertyKey.Builder keyBuilder = accessor.keyBuilder(); |
| List<HelixManager> participantToClose = new ArrayList<>(); |
| |
| // do the test |
| try { |
| Thread.sleep(1000); |
| // ensure that the external view coalesces |
| boolean result = |
| ClusterStateVerifier.verifyByZkCallback(new BestPossAndExtViewZkVerifier(ZK_ADDR, |
| clusterName)); |
| Assert.assertTrue(result); |
| ExternalView stableExternalView = |
| accessor.getProperty(keyBuilder.externalView(RESOURCE_NAME)); |
| for (int i = 0; i < NUM_PARTICIPANTS; i++) { |
| // disable the controller, bounce the node, re-enable the controller, verify assignments |
| // remained the same |
| HelixManager participant = participants[i]; |
| helixAdmin.enableCluster(clusterName, false); |
| participant.disconnect(); |
| Thread.sleep(1000); |
| participant = createParticipant(clusterName, participant.getInstanceName()); |
| participantToClose.add(participant); |
| participant.connect(); |
| participants[i] = participant; |
| Thread.sleep(1000); |
| helixAdmin.enableCluster(clusterName, true); |
| Thread.sleep(1000); |
| result = |
| ClusterStateVerifier.verifyByZkCallback(new MatchingExternalViewVerifier( |
| stableExternalView, clusterName)); |
| Assert.assertTrue(result); |
| } |
| } finally { |
| // clean up |
| controller.syncStop(); |
| for (HelixManager participant : participantToClose) { |
| participant.disconnect(); |
| } |
| TestHelper.dropCluster(clusterName, _gZkClient); |
| System.out.println("END " + clusterName + " at " + new Date(System.currentTimeMillis())); |
| } |
| } |
| |
| private HelixManager createParticipant(String clusterName, String instanceName) { |
| HelixManager participant = |
| new ZKHelixManager(clusterName, instanceName, InstanceType.PARTICIPANT, ZK_ADDR); |
| participant.getStateMachineEngine().registerStateModelFactory("OnlineOffline", |
| new MockStateModelFactory()); |
| return participant; |
| } |
| |
| @StateModelInfo(initialState = "OFFLINE", states = { |
| "ONLINE", "OFFLINE", "DROPPED", "ERROR" |
| }) |
| public static class MockStateModel extends StateModel { |
| @Transition(to = "*", from = "*") |
| public void onBecomeAnyFromAny(Message message, NotificationContext context) { |
| } |
| } |
| |
| private static class MockStateModelFactory extends StateModelFactory<MockStateModel> { |
| |
| @Override |
| public MockStateModel createNewStateModel(String resource, String partitionName) { |
| return new MockStateModel(); |
| } |
| |
| } |
| |
| /** |
| * Simple verifier: just check that the external view matches a reference |
| */ |
| private static class MatchingExternalViewVerifier implements ZkVerifier { |
| private final HelixDataAccessor _accessor; |
| private final ExternalView _reference; |
| private final String _clusterName; |
| |
| public MatchingExternalViewVerifier(ExternalView reference, String clusterName) { |
| BaseDataAccessor<ZNRecord> baseAccessor = new ZkBaseDataAccessor<ZNRecord>(_gZkClient); |
| _accessor = new ZKHelixDataAccessor(clusterName, baseAccessor); |
| _reference = reference; |
| _clusterName = clusterName; |
| } |
| |
| @Override |
| public boolean verify() { |
| ExternalView externalView = |
| _accessor.getProperty(_accessor.keyBuilder().externalView(_reference.getResourceName())); |
| return _reference.equals(externalView); |
| } |
| |
| @Override |
| public ZkClient getZkClient() { |
| return (ZkClient) _gZkClient; |
| } |
| |
| @Override |
| public String getClusterName() { |
| return _clusterName; |
| } |
| |
| } |
| } |