You are viewing a plain text version of this content. The canonical link for it is here.
Posted to hdfs-commits@hadoop.apache.org by jg...@apache.org on 2010/11/16 23:24:23 UTC
svn commit: r1035842 -
/hadoop/hdfs/trunk/src/test/hdfs/org/apache/hadoop/hdfs/server/namenode/TestParallelImageWrite.java
Author: jghoman
Date: Tue Nov 16 22:24:23 2010
New Revision: 1035842
URL: http://svn.apache.org/viewvc?rev=1035842&view=rev
Log:
Forgot to add new test case in previous commit.
Added:
hadoop/hdfs/trunk/src/test/hdfs/org/apache/hadoop/hdfs/server/namenode/TestParallelImageWrite.java
Added: hadoop/hdfs/trunk/src/test/hdfs/org/apache/hadoop/hdfs/server/namenode/TestParallelImageWrite.java
URL: http://svn.apache.org/viewvc/hadoop/hdfs/trunk/src/test/hdfs/org/apache/hadoop/hdfs/server/namenode/TestParallelImageWrite.java?rev=1035842&view=auto
==============================================================================
--- hadoop/hdfs/trunk/src/test/hdfs/org/apache/hadoop/hdfs/server/namenode/TestParallelImageWrite.java (added)
+++ hadoop/hdfs/trunk/src/test/hdfs/org/apache/hadoop/hdfs/server/namenode/TestParallelImageWrite.java Tue Nov 16 22:24:23 2010
@@ -0,0 +1,133 @@
+/**
+ * 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;
+
+import junit.framework.TestCase;
+
+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.apache.hadoop.hdfs.server.namenode.FSImage;
+import org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory;
+import org.apache.hadoop.hdfs.MiniDFSCluster;
+import org.apache.hadoop.hdfs.DFSTestUtil;
+import org.apache.hadoop.hdfs.HdfsConfiguration;
+import org.apache.hadoop.hdfs.protocol.FSConstants.SafeModeAction;
+import org.apache.hadoop.util.PureJavaCrc32;
+
+import java.util.Iterator;
+import java.util.List;
+import java.util.ArrayList;
+
+import java.io.File;
+import java.io.FileInputStream;
+
+/**
+ * A JUnit test for checking if restarting DFS preserves integrity.
+ * Specifically with FSImage being written in parallel
+ */
+public class TestParallelImageWrite extends TestCase {
+ /** check if DFS remains in proper condition after a restart */
+ public void testRestartDFS() throws Exception {
+ final Configuration conf = new HdfsConfiguration();
+ MiniDFSCluster cluster = null;
+ FSNamesystem fsn = null;
+ DFSTestUtil files = new DFSTestUtil("TestRestartDFS", 200, 3, 8*1024);
+
+ final String dir = "/srcdat";
+ final Path rootpath = new Path("/");
+ final Path dirpath = new Path(dir);
+
+ long rootmtime;
+ FileStatus rootstatus;
+ FileStatus dirstatus;
+
+ try {
+ cluster = new MiniDFSCluster.Builder(conf).format(true).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 {
+ // Here we restart the MiniDFScluster without formatting namenode
+ cluster = new MiniDFSCluster.Builder(conf).format(false).numDataNodes(4).build();
+ fsn = cluster.getNamesystem();
+ 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();
+
+ checkImages(fsn);
+
+ // Modify the system and then perform saveNamespace
+ files.cleanup(fs, dir);
+ files.createFiles(fs, dir);
+ fsn.setSafeMode(SafeModeAction.SAFEMODE_ENTER);
+ cluster.getNameNode().saveNamespace();
+ checkImages(fsn);
+ fsn.setSafeMode(SafeModeAction.SAFEMODE_LEAVE);
+ files.cleanup(fs, dir);
+ } finally {
+ if (cluster != null) { cluster.shutdown(); }
+ }
+ }
+
+ private void checkImages(FSNamesystem fsn) throws Exception {
+ Iterator<StorageDirectory> iter = fsn.
+ getFSImage().dirIterator(FSImage.NameNodeDirType.IMAGE);
+ List<Long> checksums = new ArrayList<Long>();
+ while (iter.hasNext()) {
+ StorageDirectory sd = iter.next();
+ File fsImage = FSImage.getImageFile(sd, FSImage.NameNodeFile.IMAGE);
+ PureJavaCrc32 crc = new PureJavaCrc32();
+ FileInputStream in = new FileInputStream(fsImage);
+ byte[] buff = new byte[4096];
+ int read = 0;
+ while ((read = in.read(buff)) != -1) {
+ crc.update(buff, 0, read);
+ }
+ long val = crc.getValue();
+ checksums.add(val);
+ }
+ assertTrue("Not enough fsimage copies in MiniDFSCluster " +
+ "to test parallel write", checksums.size() > 1);
+ for (int i = 1; i < checksums.size(); i++) {
+ assertEquals(checksums.get(i - 1), checksums.get(i));
+ }
+ }
+}
+