| /** |
| * |
| * 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.hadoop.hbase.master; |
| |
| import org.apache.hadoop.hbase.ClusterStatus; |
| import org.apache.hadoop.hbase.HBaseTestingUtility; |
| import org.apache.hadoop.hbase.MasterNotRunningException; |
| import org.apache.hadoop.hbase.MiniHBaseCluster; |
| import org.apache.hadoop.hbase.testclassification.LargeTests; |
| import org.apache.hadoop.hbase.testclassification.MasterTests; |
| import org.apache.hadoop.hbase.util.JVMClusterUtil; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| @Category({MasterTests.class, LargeTests.class}) |
| public class TestMasterFailoverBalancerPersistence { |
| |
| /** |
| * Test that if the master fails, the load balancer maintains its |
| * state (running or not) when the next master takes over |
| * |
| * @throws Exception |
| */ |
| @Test(timeout = 240000) |
| public void testMasterFailoverBalancerPersistence() throws Exception { |
| final int NUM_MASTERS = 3; |
| final int NUM_RS = 1; |
| |
| // Start the cluster |
| HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility(); |
| |
| TEST_UTIL.startMiniCluster(NUM_MASTERS, NUM_RS); |
| MiniHBaseCluster cluster = TEST_UTIL.getHBaseCluster(); |
| |
| assertTrue(cluster.waitForActiveAndReadyMaster()); |
| HMaster active = cluster.getMaster(); |
| // check that the balancer is on by default for the active master |
| ClusterStatus clusterStatus = active.getClusterStatus(); |
| assertTrue(clusterStatus.isBalancerOn()); |
| |
| active = killActiveAndWaitForNewActive(cluster); |
| |
| // ensure the load balancer is still running on new master |
| clusterStatus = active.getClusterStatus(); |
| assertTrue(clusterStatus.isBalancerOn()); |
| |
| // turn off the load balancer |
| active.balanceSwitch(false); |
| |
| // once more, kill active master and wait for new active master to show up |
| active = killActiveAndWaitForNewActive(cluster); |
| |
| // ensure the load balancer is not running on the new master |
| clusterStatus = active.getClusterStatus(); |
| assertFalse(clusterStatus.isBalancerOn()); |
| |
| // Stop the cluster |
| TEST_UTIL.shutdownMiniCluster(); |
| } |
| |
| /** |
| * Kill the master and wait for a new active master to show up |
| * |
| * @param cluster |
| * @return the new active master |
| * @throws InterruptedException |
| * @throws java.io.IOException |
| */ |
| private HMaster killActiveAndWaitForNewActive(MiniHBaseCluster cluster) |
| throws InterruptedException, IOException { |
| int activeIndex = getActiveMasterIndex(cluster); |
| HMaster active = cluster.getMaster(); |
| cluster.stopMaster(activeIndex); |
| cluster.waitOnMaster(activeIndex); |
| assertTrue(cluster.waitForActiveAndReadyMaster()); |
| // double check this is actually a new master |
| HMaster newActive = cluster.getMaster(); |
| assertFalse(active == newActive); |
| return newActive; |
| } |
| |
| /** |
| * return the index of the active master in the cluster |
| * |
| * @throws org.apache.hadoop.hbase.MasterNotRunningException |
| * if no active master found |
| */ |
| private int getActiveMasterIndex(MiniHBaseCluster cluster) throws MasterNotRunningException { |
| // get all the master threads |
| List<JVMClusterUtil.MasterThread> masterThreads = cluster.getMasterThreads(); |
| |
| for (int i = 0; i < masterThreads.size(); i++) { |
| if (masterThreads.get(i).getMaster().isActiveMaster()) { |
| return i; |
| } |
| } |
| throw new MasterNotRunningException(); |
| } |
| |
| } |