| /** |
| * 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 static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_RESOURCE_CHECK_INTERVAL_DEFAULT; |
| import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_RESOURCE_CHECK_INTERVAL_KEY; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.util.Collection; |
| import java.util.List; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.hdfs.MiniDFSNNTopology; |
| import org.apache.hadoop.hdfs.server.namenode.FSNamesystem; |
| import org.apache.hadoop.hdfs.server.namenode.NNStorage; |
| import org.apache.hadoop.hdfs.server.namenode.NameNode; |
| import org.apache.hadoop.test.GenericTestUtils; |
| import org.apache.hadoop.util.ExitUtil.ExitException; |
| import org.junit.Test; |
| |
| import com.google.common.base.Joiner; |
| |
| public class TestFailureOfSharedDir { |
| |
| /** |
| * Test that the shared edits dir is automatically added to the list of edits |
| * dirs that are marked required. |
| */ |
| @Test |
| public void testSharedDirIsAutomaticallyMarkedRequired() |
| throws URISyntaxException { |
| URI foo = new URI("file:/foo"); |
| URI bar = new URI("file:/bar"); |
| Configuration conf = new Configuration(); |
| conf.set(DFSConfigKeys.DFS_NAMENODE_EDITS_DIR_KEY, Joiner.on(",").join(foo, bar)); |
| conf.set(DFSConfigKeys.DFS_NAMENODE_EDITS_DIR_REQUIRED_KEY, foo.toString()); |
| assertFalse(FSNamesystem.getRequiredNamespaceEditsDirs(conf).contains( |
| bar)); |
| conf.set(DFSConfigKeys.DFS_NAMENODE_SHARED_EDITS_DIR_KEY, bar.toString()); |
| Collection<URI> requiredEditsDirs = FSNamesystem |
| .getRequiredNamespaceEditsDirs(conf); |
| assertTrue(Joiner.on(",").join(requiredEditsDirs) + " does not contain " + bar, |
| requiredEditsDirs.contains(bar)); |
| } |
| |
| /** |
| * Multiple shared edits directories is an invalid configuration. |
| */ |
| @Test |
| public void testMultipleSharedDirsFails() throws Exception { |
| Configuration conf = new Configuration(); |
| URI sharedA = new URI("file:///shared-A"); |
| URI sharedB = new URI("file:///shared-B"); |
| URI localA = new URI("file:///local-A"); |
| |
| conf.set(DFSConfigKeys.DFS_NAMENODE_SHARED_EDITS_DIR_KEY, |
| Joiner.on(",").join(sharedA,sharedB)); |
| conf.set(DFSConfigKeys.DFS_NAMENODE_EDITS_DIR_KEY, |
| localA.toString()); |
| |
| try { |
| FSNamesystem.getNamespaceEditsDirs(conf); |
| fail("Allowed multiple shared edits directories"); |
| } catch (IOException ioe) { |
| assertEquals("Multiple shared edits directories are not yet supported", |
| ioe.getMessage()); |
| } |
| } |
| |
| /** |
| * Make sure that the shared edits dirs are listed before non-shared dirs |
| * when the configuration is parsed. This ensures that the shared journals |
| * are synced before the local ones. |
| */ |
| @Test |
| public void testSharedDirsComeFirstInEditsList() throws Exception { |
| Configuration conf = new Configuration(); |
| URI sharedA = new URI("file:///shared-A"); |
| URI localA = new URI("file:///local-A"); |
| URI localB = new URI("file:///local-B"); |
| URI localC = new URI("file:///local-C"); |
| |
| conf.set(DFSConfigKeys.DFS_NAMENODE_SHARED_EDITS_DIR_KEY, |
| sharedA.toString()); |
| // List them in reverse order, to make sure they show up in |
| // the order listed, regardless of lexical sort order. |
| conf.set(DFSConfigKeys.DFS_NAMENODE_EDITS_DIR_KEY, |
| Joiner.on(",").join(localC, localB, localA)); |
| List<URI> dirs = FSNamesystem.getNamespaceEditsDirs(conf); |
| assertEquals( |
| "Shared dirs should come first, then local dirs, in the order " + |
| "they were listed in the configuration.", |
| Joiner.on(",").join(sharedA, localC, localB, localA), |
| Joiner.on(",").join(dirs)); |
| } |
| |
| /** |
| * Test that marking the shared edits dir as being "required" causes the NN to |
| * fail if that dir can't be accessed. |
| */ |
| @Test |
| public void testFailureOfSharedDir() throws Exception { |
| Configuration conf = new Configuration(); |
| conf.setLong(DFS_NAMENODE_RESOURCE_CHECK_INTERVAL_KEY, 2000); |
| |
| // The shared edits dir will automatically be marked required. |
| MiniDFSCluster cluster = null; |
| File sharedEditsDir = null; |
| try { |
| cluster = new MiniDFSCluster.Builder(conf) |
| .nnTopology(MiniDFSNNTopology.simpleHATopology()) |
| .numDataNodes(0) |
| .checkExitOnShutdown(false) |
| .build(); |
| |
| cluster.waitActive(); |
| cluster.transitionToActive(0); |
| |
| FileSystem fs = HATestUtil.configureFailoverFs(cluster, conf); |
| |
| assertTrue(fs.mkdirs(new Path("/test1"))); |
| |
| // Blow away the shared edits dir. |
| URI sharedEditsUri = cluster.getSharedEditsDir(0, 1); |
| sharedEditsDir = new File(sharedEditsUri); |
| assertEquals(0, FileUtil.chmod(sharedEditsDir.getAbsolutePath(), "-w", |
| true)); |
| |
| Thread.sleep(conf.getLong(DFS_NAMENODE_RESOURCE_CHECK_INTERVAL_KEY, |
| DFS_NAMENODE_RESOURCE_CHECK_INTERVAL_DEFAULT) * 2); |
| |
| NameNode nn1 = cluster.getNameNode(1); |
| assertTrue(nn1.isStandbyState()); |
| assertFalse( |
| "StandBy NameNode should not go to SafeMode on resource unavailability", |
| nn1.isInSafeMode()); |
| |
| NameNode nn0 = cluster.getNameNode(0); |
| try { |
| // Make sure that subsequent operations on the NN fail. |
| nn0.getRpcServer().rollEditLog(); |
| fail("Succeeded in rolling edit log despite shared dir being deleted"); |
| } catch (ExitException ee) { |
| GenericTestUtils.assertExceptionContains( |
| "finalize log segment 1, 3 failed for required journal", ee); |
| } |
| |
| // Check that none of the edits dirs rolled, since the shared edits |
| // dir didn't roll. Regression test for HDFS-2874. |
| for (URI editsUri : cluster.getNameEditsDirs(0)) { |
| if (editsUri.equals(sharedEditsUri)) { |
| continue; |
| } |
| File editsDir = new File(editsUri.getPath()); |
| File curDir = new File(editsDir, "current"); |
| GenericTestUtils.assertGlobEquals(curDir, |
| "edits_.*", |
| NNStorage.getInProgressEditsFileName(1)); |
| } |
| } finally { |
| if (sharedEditsDir != null) { |
| // without this test cleanup will fail |
| FileUtil.chmod(sharedEditsDir.getAbsolutePath(), "+w", true); |
| } |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| } |