| /** |
| * 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.hdfs.server.namenode.ha; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.DFSTestUtil; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.hdfs.MiniDFSNNTopology; |
| import org.apache.hadoop.hdfs.server.namenode.FSNamesystem; |
| import org.apache.hadoop.io.IOUtils; |
| import org.junit.Test; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| /** |
| * Make sure HA-related metrics are updated and reported appropriately. |
| */ |
| public class TestHAMetrics { |
| |
| private static final Log LOG = LogFactory.getLog(TestHAMetrics.class); |
| |
| @Test(timeout = 300000) |
| public void testHAMetrics() throws Exception { |
| Configuration conf = new Configuration(); |
| conf.setInt(DFSConfigKeys.DFS_HA_TAILEDITS_PERIOD_KEY, 1); |
| conf.setInt(DFSConfigKeys.DFS_HA_LOGROLL_PERIOD_KEY, Integer.MAX_VALUE); |
| |
| MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf) |
| .nnTopology(MiniDFSNNTopology.simpleHATopology()).numDataNodes(1) |
| .build(); |
| FileSystem fs = null; |
| try { |
| cluster.waitActive(); |
| |
| FSNamesystem nn0 = cluster.getNamesystem(0); |
| FSNamesystem nn1 = cluster.getNamesystem(1); |
| |
| assertEquals(nn0.getHAState(), "standby"); |
| assertTrue(0 < nn0.getMillisSinceLastLoadedEdits()); |
| assertEquals(nn1.getHAState(), "standby"); |
| assertTrue(0 < nn1.getMillisSinceLastLoadedEdits()); |
| |
| cluster.transitionToActive(0); |
| |
| assertEquals("active", nn0.getHAState()); |
| assertEquals(0, nn0.getMillisSinceLastLoadedEdits()); |
| assertEquals("standby", nn1.getHAState()); |
| assertTrue(0 < nn1.getMillisSinceLastLoadedEdits()); |
| |
| cluster.transitionToStandby(0); |
| cluster.transitionToActive(1); |
| |
| assertEquals("standby", nn0.getHAState()); |
| assertTrue(0 < nn0.getMillisSinceLastLoadedEdits()); |
| assertEquals("active", nn1.getHAState()); |
| assertEquals(0, nn1.getMillisSinceLastLoadedEdits()); |
| |
| Thread.sleep(2000); // make sure standby gets a little out-of-date |
| assertTrue(2000 <= nn0.getMillisSinceLastLoadedEdits()); |
| |
| assertEquals(0, nn0.getPendingDataNodeMessageCount()); |
| assertEquals(0, nn1.getPendingDataNodeMessageCount()); |
| |
| fs = HATestUtil.configureFailoverFs(cluster, conf); |
| DFSTestUtil.createFile(fs, new Path("/foo"), |
| 10, (short)1, 1L); |
| |
| assertTrue(0 < nn0.getPendingDataNodeMessageCount()); |
| assertEquals(0, nn1.getPendingDataNodeMessageCount()); |
| long millisSinceLastLoadedEdits = nn0.getMillisSinceLastLoadedEdits(); |
| |
| HATestUtil.waitForStandbyToCatchUp(cluster.getNameNode(1), |
| cluster.getNameNode(0)); |
| |
| assertEquals(0, nn0.getPendingDataNodeMessageCount()); |
| assertEquals(0, nn1.getPendingDataNodeMessageCount()); |
| long newMillisSinceLastLoadedEdits = nn0.getMillisSinceLastLoadedEdits(); |
| // Since we just waited for the standby to catch up, the time since we |
| // last loaded edits should be very low. |
| assertTrue("expected " + millisSinceLastLoadedEdits + " > " + |
| newMillisSinceLastLoadedEdits, |
| millisSinceLastLoadedEdits > newMillisSinceLastLoadedEdits); |
| } finally { |
| IOUtils.cleanup(LOG, fs); |
| cluster.shutdown(); |
| } |
| } |
| } |