| /** |
| * 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.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.junit.Test; |
| |
| /** |
| * A JUnit test for checking if restarting DFS preserves integrity. |
| */ |
| public class TestRestartDFS { |
| public void runTests(Configuration conf, boolean serviceTest) throws Exception { |
| MiniDFSCluster cluster = null; |
| DFSTestUtil files = new DFSTestUtil.Builder().setName("TestRestartDFS"). |
| setNumFiles(20).build(); |
| |
| final String dir = "/srcdat"; |
| final Path rootpath = new Path("/"); |
| final Path dirpath = new Path(dir); |
| |
| long rootmtime; |
| FileStatus rootstatus; |
| FileStatus dirstatus; |
| |
| try { |
| if (serviceTest) { |
| conf.set(DFSConfigKeys.DFS_NAMENODE_SERVICE_RPC_ADDRESS_KEY, |
| "localhost:0"); |
| } |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(4).build(); |
| FileSystem fs = cluster.getFileSystem(); |
| files.createFiles(fs, dir); |
| |
| rootmtime = fs.getFileStatus(rootpath).getModificationTime(); |
| rootstatus = fs.getFileStatus(dirpath); |
| dirstatus = fs.getFileStatus(dirpath); |
| |
| fs.setOwner(rootpath, rootstatus.getOwner() + "_XXX", null); |
| fs.setOwner(dirpath, null, dirstatus.getGroup() + "_XXX"); |
| } finally { |
| if (cluster != null) { cluster.shutdown(); } |
| } |
| try { |
| if (serviceTest) { |
| conf.set(DFSConfigKeys.DFS_NAMENODE_SERVICE_RPC_ADDRESS_KEY, |
| "localhost:0"); |
| } |
| // Here we restart the MiniDFScluster without formatting namenode |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(4).format(false).build(); |
| FileSystem fs = cluster.getFileSystem(); |
| assertTrue("Filesystem corrupted after restart.", |
| files.checkFiles(fs, dir)); |
| |
| final FileStatus newrootstatus = fs.getFileStatus(rootpath); |
| assertEquals(rootmtime, newrootstatus.getModificationTime()); |
| assertEquals(rootstatus.getOwner() + "_XXX", newrootstatus.getOwner()); |
| assertEquals(rootstatus.getGroup(), newrootstatus.getGroup()); |
| |
| final FileStatus newdirstatus = fs.getFileStatus(dirpath); |
| assertEquals(dirstatus.getOwner(), newdirstatus.getOwner()); |
| assertEquals(dirstatus.getGroup() + "_XXX", newdirstatus.getGroup()); |
| rootmtime = fs.getFileStatus(rootpath).getModificationTime(); |
| } finally { |
| if (cluster != null) { cluster.shutdown(); } |
| } |
| try { |
| if (serviceTest) { |
| conf.set(DFSConfigKeys.DFS_NAMENODE_SERVICE_RPC_ADDRESS_KEY, |
| "localhost:0"); |
| } |
| // This is a second restart to check that after the first restart |
| // the image written in parallel to both places did not get corrupted |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(4).format(false).build(); |
| FileSystem fs = cluster.getFileSystem(); |
| assertTrue("Filesystem corrupted after restart.", |
| files.checkFiles(fs, dir)); |
| |
| final FileStatus newrootstatus = fs.getFileStatus(rootpath); |
| assertEquals(rootmtime, newrootstatus.getModificationTime()); |
| assertEquals(rootstatus.getOwner() + "_XXX", newrootstatus.getOwner()); |
| assertEquals(rootstatus.getGroup(), newrootstatus.getGroup()); |
| |
| final FileStatus newdirstatus = fs.getFileStatus(dirpath); |
| assertEquals(dirstatus.getOwner(), newdirstatus.getOwner()); |
| assertEquals(dirstatus.getGroup() + "_XXX", newdirstatus.getGroup()); |
| |
| files.cleanup(fs, dir); |
| } finally { |
| if (cluster != null) { cluster.shutdown(); } |
| } |
| } |
| /** check if DFS remains in proper condition after a restart */ |
| @Test |
| public void testRestartDFS() throws Exception { |
| final Configuration conf = new HdfsConfiguration(); |
| runTests(conf, false); |
| } |
| |
| /** check if DFS remains in proper condition after a restart |
| * this rerun is with 2 ports enabled for RPC in the namenode |
| */ |
| @Test |
| public void testRestartDualPortDFS() throws Exception { |
| final Configuration conf = new HdfsConfiguration(); |
| runTests(conf, true); |
| } |
| } |