| /** |
| * 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; |
| |
| import static org.mockito.Mockito.doReturn; |
| import static org.mockito.Mockito.spy; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.protocol.HdfsConstants.RollingUpgradeAction; |
| import org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction; |
| import org.apache.hadoop.hdfs.protocol.RollingUpgradeInfo; |
| import org.apache.hadoop.hdfs.qjournal.MiniQJMHACluster; |
| import org.apache.hadoop.hdfs.server.common.IncorrectVersionException; |
| import org.apache.hadoop.hdfs.server.namenode.NNStorage; |
| import org.apache.hadoop.hdfs.server.namenode.NameNodeLayoutVersion; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| public class TestRollingUpgradeDowngrade { |
| |
| @Test(timeout = 300000) |
| public void testDowngrade() throws Exception { |
| final Configuration conf = new HdfsConfiguration(); |
| MiniQJMHACluster cluster = null; |
| final Path foo = new Path("/foo"); |
| final Path bar = new Path("/bar"); |
| |
| try { |
| cluster = new MiniQJMHACluster.Builder(conf).build(); |
| MiniDFSCluster dfsCluster = cluster.getDfsCluster(); |
| dfsCluster.waitActive(); |
| |
| // let NN1 tail editlog every 1s |
| dfsCluster.getConfiguration(1).setInt( |
| DFSConfigKeys.DFS_HA_TAILEDITS_PERIOD_KEY, 1); |
| dfsCluster.restartNameNode(1); |
| |
| dfsCluster.transitionToActive(0); |
| DistributedFileSystem dfs = dfsCluster.getFileSystem(0); |
| dfs.mkdirs(foo); |
| |
| // start rolling upgrade |
| RollingUpgradeInfo info = dfs |
| .rollingUpgrade(RollingUpgradeAction.PREPARE); |
| Assert.assertTrue(info.isStarted()); |
| dfs.mkdirs(bar); |
| |
| TestRollingUpgrade.queryForPreparation(dfs); |
| dfs.close(); |
| |
| dfsCluster.restartNameNode(0, true, "-rollingUpgrade", "downgrade"); |
| // Once downgraded, there should be no more fsimage for rollbacks. |
| Assert.assertFalse(dfsCluster.getNamesystem(0).getFSImage() |
| .hasRollbackFSImage()); |
| // shutdown NN1 |
| dfsCluster.shutdownNameNode(1); |
| dfsCluster.transitionToActive(0); |
| |
| dfs = dfsCluster.getFileSystem(0); |
| Assert.assertTrue(dfs.exists(foo)); |
| Assert.assertTrue(dfs.exists(bar)); |
| } finally { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| |
| /** |
| * Ensure that during downgrade the NN fails to load a fsimage with newer |
| * format. |
| */ |
| @Test(expected = IncorrectVersionException.class) |
| public void testRejectNewFsImage() throws IOException { |
| final Configuration conf = new Configuration(); |
| MiniDFSCluster cluster = null; |
| try { |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0).build(); |
| cluster.waitActive(); |
| DistributedFileSystem fs = cluster.getFileSystem(); |
| fs.setSafeMode(SafeModeAction.SAFEMODE_ENTER); |
| fs.saveNamespace(); |
| fs.setSafeMode(SafeModeAction.SAFEMODE_LEAVE); |
| NNStorage storage = spy(cluster.getNameNode().getFSImage().getStorage()); |
| int futureVersion = NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION - 1; |
| doReturn(futureVersion).when(storage).getServiceLayoutVersion(); |
| storage.writeAll(); |
| cluster.restartNameNode(0, true, "-rollingUpgrade", "downgrade"); |
| } finally { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| } |