| /** |
| * 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.mapred; |
| |
| import java.io.IOException; |
| import java.security.PrivilegedAction; |
| import java.security.PrivilegedExceptionAction; |
| import junit.framework.TestCase; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.permission.FsPermission; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.security.*; |
| |
| /** |
| * Test if JobTracker is resilient to garbage in mapred.system.dir. |
| */ |
| public class TestMapredSystemDir extends TestCase { |
| private static final Log LOG = LogFactory.getLog(TestMapredSystemDir.class); |
| |
| // mapred ugi |
| private static final UserGroupInformation MR_UGI = |
| TestMiniMRWithDFSWithDistinctUsers.createUGI("mr", false); |
| private static final FsPermission SYSTEM_DIR_PERMISSION = |
| FsPermission.createImmutable((short) 0733); // rwx-wx-wx |
| |
| public void testGarbledMapredSystemDir() throws Exception { |
| final Configuration conf = new Configuration(); |
| MiniDFSCluster dfs = null; |
| MiniMRCluster mr = null; |
| try { |
| // start dfs |
| conf.set("dfs.permissions.supergroup", "supergroup"); |
| conf.set("mapred.system.dir", "/mapred"); |
| dfs = new MiniDFSCluster(conf, 1, true, null); |
| FileSystem fs = dfs.getFileSystem(); |
| // create Configs.SYSTEM_DIR's parent (the parent has to be given |
| // permissions since the JT internally tries to delete the leaf of |
| // the directory structure |
| Path mapredSysDir = new Path(conf.get("mapred.system.dir")).getParent(); |
| fs.mkdirs(mapredSysDir); |
| fs.setPermission(mapredSysDir, new FsPermission(SYSTEM_DIR_PERMISSION)); |
| fs.setOwner(mapredSysDir, "mr", "mrgroup"); |
| |
| final MiniDFSCluster finalDFS = dfs; |
| |
| // Become MR_UGI to do start the job tracker... |
| mr = MR_UGI.doAs(new PrivilegedExceptionAction<MiniMRCluster>() { |
| @Override |
| public MiniMRCluster run() throws Exception { |
| // start mr (i.e jobtracker) |
| Configuration mrConf = new Configuration(); |
| |
| FileSystem fs = finalDFS.getFileSystem(); |
| MiniMRCluster mr2 = new MiniMRCluster(0, 0, 0, fs.getUri().toString(), |
| 1, null, null, MR_UGI, new JobConf(mrConf)); |
| JobTracker jobtracker = mr2.getJobTrackerRunner().getJobTracker(); |
| // add garbage to mapred.system.dir |
| Path garbage = new Path(jobtracker.getSystemDir(), "garbage"); |
| fs.mkdirs(garbage); |
| fs.setPermission(garbage, new FsPermission(SYSTEM_DIR_PERMISSION)); |
| return mr2; |
| } |
| }); |
| |
| // Drop back to regular user (superuser) to change owner of garbage dir |
| final Path garbage = new Path( |
| mr.getJobTrackerRunner().getJobTracker().getSystemDir(), "garbage"); |
| fs.setOwner(garbage, "test", "test-group"); |
| |
| // Again become MR_UGI to start/stop the MR cluster |
| final MiniMRCluster mr2 = mr; |
| MR_UGI.doAs(new PrivilegedExceptionAction<Object>() { |
| @Override |
| public Object run() throws Exception { |
| // stop the jobtracker |
| mr2.stopJobTracker(); |
| mr2.getJobTrackerConf().setBoolean( |
| "mapred.jobtracker.restart.recover", false); |
| // start jobtracker but dont wait for it to be up |
| mr2.startJobTracker(false); |
| |
| // check 5 times .. each time wait for 2 secs to check if the |
| // jobtracker |
| // has crashed or not. |
| for (int i = 0; i < 5; ++i) { |
| LOG.info("Check #" + i); |
| if (!mr2.getJobTrackerRunner().isActive()) { |
| return null; |
| } |
| UtilsForTests.waitFor(2000); |
| } |
| return null; |
| } |
| }); |
| |
| assertFalse("JobTracker did not bail out (waited for 10 secs)", |
| mr.getJobTrackerRunner().isActive()); |
| } finally { |
| if (dfs != null) { dfs.shutdown(); } |
| if (mr != null) { mr.shutdown();} |
| } |
| } |
| } |