/**
* 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.raid;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.net.URI;
import java.nio.channels.FileChannel;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.Set;
import java.util.zip.CRC32;
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.FSDataInputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.RaidDFSUtil;
import org.apache.hadoop.hdfs.TestRaidDfs;
import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
import org.apache.hadoop.mapred.MiniMRCluster;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.util.StringUtils;
import org.junit.Test;
public class TestBlockFixer extends TestCase {
final static Log LOG = LogFactory.getLog(
"org.apache.hadoop.raid.TestBlockFixer");
final static String TEST_DIR = new File(System.getProperty("test.build.data",
"build/contrib/raid/test/data")).getAbsolutePath();
final static String CONFIG_FILE = new File(TEST_DIR,
"test-raid.xml").getAbsolutePath();
final static long RELOAD_INTERVAL = 1000;
final static int NUM_DATANODES = 3;
Configuration conf;
String namenode = null;
MiniDFSCluster dfs = null;
String hftp = null;
MiniMRCluster mr = null;
FileSystem fileSys = null;
RaidNode cnode = null;
String jobTrackerName = null;
Random rand = new Random();
static {
ParityFilePair.disableCacheUsedInTestOnly();
}
@Test
public void testFilterUnfixableFiles() throws IOException {
conf = new Configuration();
dfs = new MiniDFSCluster(conf, NUM_DATANODES, true, null);
dfs.waitActive();
FileSystem fs = dfs.getFileSystem();
try {
Configuration testConf = new Configuration();
testConf.set("hdfs.raid.locations", "/raid");
testConf.set("hdfs.raidrs.locations", "/raidrs");
BlockFixer blockFixer = new LocalBlockFixer(testConf);
String p1 = "/user/foo/f1";
String p2 = "/user/foo/f2";
String p3 = "/user/foo/bar/f1";
String p4 = "/raid/user/foo";
String p5 = "/raidrs/user/foo/bar";
fs.mkdirs(new Path(p4));
List<String> fileList = new ArrayList<String>();
fileList.add(p1);
fileList.add(p2);
fileList.add(p3);
blockFixer.filterUnfixableSourceFiles(fs, fileList.iterator());
// p3 should be filtered out.
assertEquals(2, fileList.size());
Set<String> filtered = new HashSet<String>();
for (String p: fileList) filtered.add(p);
assertFalse("File not filtered", filtered.contains(p3));
fileList.add(p3);
fs.mkdirs(new Path(p5));
blockFixer.filterUnfixableSourceFiles(fs, fileList.iterator());
// Nothing is filtered.
assertEquals(3, fileList.size());
} finally {
dfs.shutdown();
}
}
/**
* Tests isXorParityFile and isRsParityFile
*/
@Test
public void testIsParityFile() throws IOException {
Configuration testConf = new Configuration();
testConf.set("hdfs.raid.locations", "/raid");
testConf.set("hdfs.raidrs.locations", "/raidrs");
BlockFixer.BlockFixerHelper helper =
new BlockFixer.BlockFixerHelper(testConf);
assertFalse("incorrectly identified rs parity file as xor parity file",
helper.isXorParityFile(new Path("/raidrs/test/test")));
assertTrue("could not identify rs parity file",
helper.isRsParityFile(new Path("/raidrs/test/test")));
assertTrue("could not identify xor parity file",
helper.isXorParityFile(new Path("/raid/test/test")));
assertFalse("incorrectly identified xor parity file as rs parity file",
helper.isRsParityFile(new Path("/raid/test/test")));
}
/**
* Test the filtering of trash files from the list of corrupt files.
*/
@Test
public void testTrashFilter() {
List<String> files = new LinkedList<String>();
// Paths that do not match the trash pattern.
String p1 = "/user/raid/raidtest/f1";
String p2 = "/user/.Trash/";
// Paths that match the trash pattern.
String p3 = "/user/raid/.Trash/raidtest/f1";
String p4 = "/user/raid/.Trash/";
String p5 = "/tmp/foo";
files.add(p1);
files.add(p3);
files.add(p4);
files.add(p2);
files.add(p5);
Configuration conf = new Configuration();
RaidUtils.filterTrash(conf, files);
assertEquals("expected 2 non-trash files but got " + files.size(),
2, files.size());
for (String p: files) {
assertTrue("wrong file returned by filterTrash",
p == p1 || p == p2);
}
}
@Test
public void testBlockFixDist() throws Exception {
implBlockFix(false);
}
@Test
public void testBlockFixLocal() throws Exception {
implBlockFix(true);
}
/**
* Create a file with three stripes, corrupt a block each in two stripes,
* and wait for the the file to be fixed.
*/
private void implBlockFix(boolean local) throws Exception {
LOG.info("Test testBlockFix started.");
long blockSize = 8192L;
int stripeLength = 3;
mySetup(stripeLength, -1); // never har
Path file1 = new Path("/user/dhruba/raidtest/file1");
Path destPath = new Path("/destraid/user/dhruba/raidtest");
long crc1 = TestRaidDfs.createTestFilePartialLastBlock(fileSys, file1,
1, 7, blockSize);
long file1Len = fileSys.getFileStatus(file1).getLen();
LOG.info("Test testBlockFix created test files");
// create an instance of the RaidNode
Configuration localConf = new Configuration(conf);
localConf.set(RaidNode.RAID_LOCATION_KEY, "/destraid");
localConf.setInt("raid.blockfix.interval", 1000);
if (local) {
localConf.set("raid.blockfix.classname",
"org.apache.hadoop.raid.LocalBlockFixer");
} else {
localConf.set("raid.blockfix.classname",
"org.apache.hadoop.raid.DistBlockFixer");
}
localConf.setLong("raid.blockfix.filespertask", 2L);
try {
cnode = RaidNode.createRaidNode(null, localConf);
TestRaidDfs.waitForFileRaided(LOG, fileSys, file1, destPath);
cnode.stop(); cnode.join();
FileStatus srcStat = fileSys.getFileStatus(file1);
DistributedFileSystem dfs = (DistributedFileSystem)fileSys;
LocatedBlocks locs = RaidDFSUtil.getBlockLocations(
dfs, file1.toUri().getPath(), 0, srcStat.getLen());
String[] corruptFiles = DFSUtil.getCorruptFiles(dfs);
assertEquals("no corrupt files expected", 0, corruptFiles.length);
assertEquals("filesFixed() should return 0 before fixing files",
0, cnode.blockFixer.filesFixed());
// Corrupt blocks in two different stripes. We can fix them.
int[] corruptBlockIdxs = new int[]{0, 4, 6};
for (int idx: corruptBlockIdxs)
corruptBlock(locs.get(idx).getBlock().getBlockName());
reportCorruptBlocks(dfs, file1, corruptBlockIdxs, blockSize);
corruptFiles = DFSUtil.getCorruptFiles(dfs);
assertEquals("file not corrupted", 1, corruptFiles.length);
assertEquals("wrong file corrupted",
corruptFiles[0], file1.toUri().getPath());
assertEquals("wrong number of corrupt blocks", 3,
RaidDFSUtil.corruptBlocksInFile(dfs, file1.toUri().getPath(), 0,
srcStat.getLen()).size());
cnode = RaidNode.createRaidNode(null, localConf);
long start = System.currentTimeMillis();
while (cnode.blockFixer.filesFixed() < 1 &&
System.currentTimeMillis() - start < 120000) {
LOG.info("Test testBlockFix waiting for files to be fixed.");
Thread.sleep(1000);
}
assertEquals("file not fixed", 1, cnode.blockFixer.filesFixed());
dfs = getDFS(conf, dfs);
assertTrue("file not fixed",
TestRaidDfs.validateFile(dfs, file1, file1Len, crc1));
} catch (Exception e) {
LOG.info("Test testBlockFix Exception " + e +
StringUtils.stringifyException(e));
throw e;
} finally {
myTearDown();
}
LOG.info("Test testBlockFix completed.");
}
/**
* Tests integrity of generated block.
* Create a file and delete a block entirely. Wait for the block to be
* regenerated. Now stop RaidNode and corrupt the generated block.
* Test that corruption in the generated block can be detected by clients.
*/
private void generatedBlockTestCommon(String testName, int blockToCorrupt,
boolean local) throws Exception {
LOG.info("Test " + testName + " started.");
long blockSize = 8192L;
int stripeLength = 3;
mySetup(stripeLength, -1); // never har
Path file1 = new Path("/user/dhruba/raidtest/file1");
Path destPath = new Path("/destraid/user/dhruba/raidtest");
long crc1 = TestRaidDfs.createTestFile(fileSys, file1, 1, 7, blockSize);
long file1Len = fileSys.getFileStatus(file1).getLen();
LOG.info("Test " + testName + " created test files");
// create an instance of the RaidNode
Configuration localConf = new Configuration(conf);
localConf.set(RaidNode.RAID_LOCATION_KEY, "/destraid");
localConf.setInt("raid.blockfix.interval", 1000);
if (local) {
localConf.set("raid.blockfix.classname",
"org.apache.hadoop.raid.LocalBlockFixer");
} else {
localConf.set("raid.blockfix.classname",
"org.apache.hadoop.raid.DistBlockFixer");
}
localConf.setLong("raid.blockfix.filespertask", 2L);
try {
cnode = RaidNode.createRaidNode(null, localConf);
TestRaidDfs.waitForFileRaided(LOG, fileSys, file1, destPath);
cnode.stop(); cnode.join();
FileStatus srcStat = fileSys.getFileStatus(file1);
DistributedFileSystem dfs = (DistributedFileSystem)fileSys;
LocatedBlocks locs = RaidDFSUtil.getBlockLocations(
dfs, file1.toUri().getPath(), 0, srcStat.getLen());
String[] corruptFiles = DFSUtil.getCorruptFiles(dfs);
assertEquals("no corrupt files expected", 0, corruptFiles.length);
assertEquals("filesFixed() should return 0 before fixing files",
0, cnode.blockFixer.filesFixed());
corruptBlock(locs.get(0).getBlock().getBlockName());
reportCorruptBlocks(dfs, file1, new int[]{0}, blockSize);
corruptFiles = DFSUtil.getCorruptFiles(dfs);
assertEquals("file not corrupted",
1, corruptFiles.length);
assertEquals("wrong file corrupted",
corruptFiles[0], file1.toUri().getPath());
cnode = RaidNode.createRaidNode(null, localConf);
long start = System.currentTimeMillis();
while (cnode.blockFixer.filesFixed() < 1 &&
System.currentTimeMillis() - start < 120000) {
LOG.info("Test " + testName + " waiting for files to be fixed.");
Thread.sleep(1000);
}
assertEquals("file not fixed",
1, cnode.blockFixer.filesFixed());
// Stop RaidNode
cnode.stop(); cnode.join(); cnode = null;
// The block has successfully been reconstructed.
dfs = getDFS(conf, dfs);
assertTrue("file not fixed",
TestRaidDfs.validateFile(dfs, file1, file1Len, crc1));
// Now corrupt the generated block.
locs = RaidDFSUtil.getBlockLocations(
dfs, file1.toUri().getPath(), 0, srcStat.getLen());
corruptBlock(locs.get(0).getBlock().getBlockName());
reportCorruptBlocks(dfs, file1, new int[]{0}, blockSize);
try {
Thread.sleep(5*1000);
} catch (InterruptedException ignore) {
}
try {
TestRaidDfs.validateFile(dfs, file1, file1Len, crc1);
fail("Expected exception not thrown");
} catch (org.apache.hadoop.fs.ChecksumException ce) {
} catch (org.apache.hadoop.fs.BlockMissingException bme) {
}
} catch (Exception e) {
LOG.info("Test " + testName + " Exception " + e +
StringUtils.stringifyException(e));
throw e;
} finally {
myTearDown();
}
LOG.info("Test " + testName + " completed.");
}
/**
* Tests integrity of generated block.
* Create a file and delete a block entirely. Wait for the block to be
* regenerated. Now stop RaidNode and corrupt the generated block.
* Test that corruption in the generated block can be detected by clients.
*/
@Test
public void testGeneratedBlockDist() throws Exception {
generatedBlockTestCommon("testGeneratedBlock", 3, false);
}
/**
* Tests integrity of generated block.
* Create a file and delete a block entirely. Wait for the block to be
* regenerated. Now stop RaidNode and corrupt the generated block.
* Test that corruption in the generated block can be detected by clients.
*/
@Test
public void testGeneratedBlockLocal() throws Exception {
generatedBlockTestCommon("testGeneratedBlock", 3, true);
}
/**
* Tests integrity of generated last block.
* Create a file and delete a block entirely. Wait for the block to be
* regenerated. Now stop RaidNode and corrupt the generated block.
* Test that corruption in the generated block can be detected by clients.
*/
@Test
public void testGeneratedLastBlockDist() throws Exception {
generatedBlockTestCommon("testGeneratedLastBlock", 6, false);
}
/**
* Tests integrity of generated last block.
* Create a file and delete a block entirely. Wait for the block to be
* regenerated. Now stop RaidNode and corrupt the generated block.
* Test that corruption in the generated block can be detected by clients.
*/
@Test
public void testGeneratedLastBlockLocal() throws Exception {
generatedBlockTestCommon("testGeneratedLastBlock", 6, true);
}
@Test
public void testParityBlockFixDist() throws Exception {
implParityBlockFix("testParityBlockFixDist", false);
}
@Test
public void testParityBlockFixLocal() throws Exception {
implParityBlockFix("testParityBlockFixLocal", true);
}
/**
* Corrupt a parity file and wait for it to get fixed.
*/
private void implParityBlockFix(String testName, boolean local)
throws Exception {
LOG.info("Test " + testName + " started.");
long blockSize = 8192L;
int stripeLength = 3;
mySetup(stripeLength, -1); // never har
Path file1 = new Path("/user/dhruba/raidtest/file1");
Path destPath = new Path("/destraid/user/dhruba/raidtest");
Path parityFile = new Path("/destraid/user/dhruba/raidtest/file1");
TestRaidDfs.createTestFilePartialLastBlock(fileSys, file1,
1, 7, blockSize);
long file1Len = fileSys.getFileStatus(file1).getLen();
LOG.info("Test " + testName + " created test files");
// create an instance of the RaidNode
Configuration localConf = new Configuration(conf);
localConf.set(RaidNode.RAID_LOCATION_KEY, "/destraid");
localConf.setInt("raid.blockfix.interval", 1000);
if (local) {
localConf.set("raid.blockfix.classname",
"org.apache.hadoop.raid.LocalBlockFixer");
} else {
localConf.set("raid.blockfix.classname",
"org.apache.hadoop.raid.DistBlockFixer");
}
localConf.setLong("raid.blockfix.filespertask", 2L);
try {
cnode = RaidNode.createRaidNode(null, localConf);
TestRaidDfs.waitForFileRaided(LOG, fileSys, file1, destPath);
cnode.stop(); cnode.join();
long parityCRC = getCRC(fileSys, parityFile);
FileStatus parityStat = fileSys.getFileStatus(parityFile);
DistributedFileSystem dfs = (DistributedFileSystem)fileSys;
LocatedBlocks locs = RaidDFSUtil.getBlockLocations(
dfs, parityFile.toUri().getPath(), 0, parityStat.getLen());
String[] corruptFiles = DFSUtil.getCorruptFiles(dfs);
assertEquals("no corrupt files expected", 0, corruptFiles.length);
assertEquals("filesFixed() should return 0 before fixing files",
0, cnode.blockFixer.filesFixed());
// Corrupt parity blocks for different stripes.
int[] corruptBlockIdxs = new int[]{0, 1, 2};
for (int idx: corruptBlockIdxs)
corruptBlock(locs.get(idx).getBlock().getBlockName());
reportCorruptBlocks(dfs, parityFile, corruptBlockIdxs, blockSize);
corruptFiles = DFSUtil.getCorruptFiles(dfs);
assertEquals("file not corrupted",
1, corruptFiles.length);
assertEquals("wrong file corrupted",
corruptFiles[0], parityFile.toUri().getPath());
cnode = RaidNode.createRaidNode(null, localConf);
long start = System.currentTimeMillis();
while (cnode.blockFixer.filesFixed() < 1 &&
System.currentTimeMillis() - start < 120000) {
LOG.info("Test " + testName + " waiting for files to be fixed.");
Thread.sleep(1000);
}
assertEquals("file not fixed",
1, cnode.blockFixer.filesFixed());
long checkCRC = getCRC(fileSys, parityFile);
assertEquals("file not fixed",
parityCRC, checkCRC);
} catch (Exception e) {
LOG.info("Test " + testName + " Exception " + e +
StringUtils.stringifyException(e));
throw e;
} finally {
myTearDown();
}
LOG.info("Test " + testName + " completed.");
}
@Test
public void testParityHarBlockFixDist() throws Exception {
implParityHarBlockFix("testParityHarBlockFixDist", false);
}
@Test
public void testParityHarBlockFixLocal() throws Exception {
implParityHarBlockFix("testParityHarBlockFixLocal", true);
}
private void implParityHarBlockFix(String testName, boolean local)
throws Exception {
LOG.info("Test " + testName + " started.");
long blockSize = 8192L;
int stripeLength = 3;
mySetup(stripeLength, 0); // Time before har = 0 days.
Path file1 = new Path("/user/dhruba/raidtest/file1");
Path destPath = new Path("/destraid/user/dhruba/raidtest");
// Parity file will have 7 blocks.
TestRaidDfs.createTestFilePartialLastBlock(fileSys, file1,
1, 20, blockSize);
long file1Len = fileSys.getFileStatus(file1).getLen();
LOG.info("Test " + testName + " created test files");
// create an instance of the RaidNode
Configuration localConf = new Configuration(conf);
localConf.set(RaidNode.RAID_LOCATION_KEY, "/destraid");
localConf.setInt("raid.blockfix.interval", 1000);
if (local) {
localConf.set("raid.blockfix.classname",
"org.apache.hadoop.raid.LocalBlockFixer");
} else {
localConf.set("raid.blockfix.classname",
"org.apache.hadoop.raid.DistBlockFixer");
}
localConf.setLong("raid.blockfix.filespertask", 2L);
try {
cnode = RaidNode.createRaidNode(null, localConf);
Path harDirectory =
new Path("/destraid/user/dhruba/raidtest/raidtest" +
RaidNode.HAR_SUFFIX);
long start = System.currentTimeMillis();
while (System.currentTimeMillis() - start < 1000 * 120) {
if (fileSys.exists(harDirectory)) {
break;
}
LOG.info("Test " + testName + " waiting for har");
Thread.sleep(1000);
}
Path partFile = new Path(harDirectory, "part-0");
long partCRC = getCRC(fileSys, partFile);
FileStatus partStat = fileSys.getFileStatus(partFile);
DistributedFileSystem dfs = (DistributedFileSystem)fileSys;
LocatedBlocks locs = RaidDFSUtil.getBlockLocations(
dfs, partFile.toUri().getPath(), 0, partStat.getLen());
assertEquals("wrong number of har blocks",
7, locs.getLocatedBlocks().size());
cnode.stop(); cnode.join();
String[] corruptFiles = DFSUtil.getCorruptFiles(dfs);
assertEquals("no corrupt files expected", 0, corruptFiles.length);
assertEquals("filesFixed() should return 0 before fixing files",
0, cnode.blockFixer.filesFixed());
// Corrupt parity blocks for different stripes.
int[] corruptBlockIdxs = new int[]{0, 1, 6};
for (int idx: corruptBlockIdxs)
corruptBlock(locs.get(idx).getBlock().getBlockName());
reportCorruptBlocks(dfs, partFile, corruptBlockIdxs,
partStat.getBlockSize());
corruptFiles = DFSUtil.getCorruptFiles(dfs);
assertEquals("file not corrupted", 1, corruptFiles.length);
assertEquals("wrong file corrupted",
corruptFiles[0], partFile.toUri().getPath());
cnode = RaidNode.createRaidNode(null, localConf);
start = System.currentTimeMillis();
while (cnode.blockFixer.filesFixed() < 1 &&
System.currentTimeMillis() - start < 120000) {
LOG.info("Test " + testName + " waiting for files to be fixed.");
Thread.sleep(1000);
}
assertEquals("file not fixed",
1, cnode.blockFixer.filesFixed());
long checkCRC = getCRC(fileSys, partFile);
assertEquals("file not fixed",
partCRC, checkCRC);
} catch (Exception e) {
LOG.info("Test " + testName + " Exception " + e +
StringUtils.stringifyException(e));
throw e;
} finally {
myTearDown();
}
LOG.info("Test " + testName + " completed.");
}
/**
* tests that we can have 2 concurrent jobs fixing files
* (dist block fixer)
*/
@Test
public void testConcurrentJobs() throws Exception {
LOG.info("Test testConcurrentJobs started.");
long blockSize = 8192L;
int stripeLength = 3;
mySetup(stripeLength, -1); // never har
Path file1 = new Path("/user/dhruba/raidtest/file1");
Path file2 = new Path("/user/dhruba/raidtest/file2");
Path destPath = new Path("/destraid/user/dhruba/raidtest");
long crc1 = TestRaidDfs.createTestFilePartialLastBlock(fileSys, file1,
1, 20, blockSize);
long crc2 = TestRaidDfs.createTestFilePartialLastBlock(fileSys, file2,
1, 20, blockSize);
long file1Len = fileSys.getFileStatus(file1).getLen();
long file2Len = fileSys.getFileStatus(file2).getLen();
LOG.info("Test testConcurrentJobs created test files");
// create an instance of the RaidNode
Configuration localConf = new Configuration(conf);
localConf.set(RaidNode.RAID_LOCATION_KEY, "/destraid");
localConf.setInt("raid.blockfix.interval", 1000);
localConf.set("raid.blockfix.classname",
"org.apache.hadoop.raid.DistBlockFixer");
localConf.setLong("raid.blockfix.filespertask", 2L);
try {
cnode = RaidNode.createRaidNode(null, localConf);
TestRaidDfs.waitForFileRaided(LOG, fileSys, file1, destPath);
TestRaidDfs.waitForFileRaided(LOG, fileSys, file2, destPath);
cnode.stop(); cnode.join();
FileStatus file1Stat = fileSys.getFileStatus(file1);
FileStatus file2Stat = fileSys.getFileStatus(file2);
DistributedFileSystem dfs = (DistributedFileSystem)fileSys;
LocatedBlocks file1Loc =
RaidDFSUtil.getBlockLocations(dfs, file1.toUri().getPath(),
0, file1Stat.getLen());
LocatedBlocks file2Loc =
RaidDFSUtil.getBlockLocations(dfs, file2.toUri().getPath(),
0, file2Stat.getLen());
String[] corruptFiles = DFSUtil.getCorruptFiles(dfs);
assertEquals("no corrupt files expected", 0, corruptFiles.length);
assertEquals("filesFixed() should return 0 before fixing files",
0, cnode.blockFixer.filesFixed());
// corrupt file1
int[] corruptBlockIdxs = new int[]{0, 4, 6};
for (int idx: corruptBlockIdxs)
corruptBlock(file1Loc.get(idx).getBlock().getBlockName());
reportCorruptBlocks(dfs, file1, corruptBlockIdxs, blockSize);
cnode = RaidNode.createRaidNode(null, localConf);
DistBlockFixer blockFixer = (DistBlockFixer) cnode.blockFixer;
long start = System.currentTimeMillis();
while (blockFixer.jobsRunning() < 1 &&
System.currentTimeMillis() - start < 240000) {
LOG.info("Test testBlockFix waiting for fixing job 1 to start");
Thread.sleep(10);
}
assertEquals("job 1 not running", 1, blockFixer.jobsRunning());
// corrupt file2
for (int idx: corruptBlockIdxs)
corruptBlock(file2Loc.get(idx).getBlock().getBlockName());
reportCorruptBlocks(dfs, file2, corruptBlockIdxs, blockSize);
while (blockFixer.jobsRunning() < 2 &&
System.currentTimeMillis() - start < 240000) {
LOG.info("Test testBlockFix waiting for fixing job 2 to start");
Thread.sleep(10);
}
assertTrue(blockFixer.jobsRunning() >= 2);
while (blockFixer.filesFixed() < 2 &&
System.currentTimeMillis() - start < 240000) {
LOG.info("Test testBlockFix waiting for files to be fixed.");
Thread.sleep(10);
}
assertEquals("files not fixed", 2, blockFixer.filesFixed());
dfs = getDFS(conf, dfs);
try {
Thread.sleep(5*1000);
} catch (InterruptedException ignore) {
}
assertTrue("file not fixed",
TestRaidDfs.validateFile(dfs, file1, file1Len, crc1));
assertTrue("file not fixed",
TestRaidDfs.validateFile(dfs, file2, file2Len, crc2));
} catch (Exception e) {
LOG.info("Test testConcurrentJobs exception " + e +
StringUtils.stringifyException(e));
throw e;
} finally {
myTearDown();
}
}
/**
* tests that the distributed block fixer obeys
* the limit on how many jobs to submit simultaneously.
*/
@Test
public void testMaxPendingJobs() throws Exception {
LOG.info("Test testMaxPendingJobs started.");
long blockSize = 8192L;
int stripeLength = 3;
mySetup(stripeLength, -1); // never har
Path file1 = new Path("/user/dhruba/raidtest/file1");
Path file2 = new Path("/user/dhruba/raidtest/file2");
Path destPath = new Path("/destraid/user/dhruba/raidtest");
long crc1 = TestRaidDfs.createTestFilePartialLastBlock(fileSys, file1,
1, 20, blockSize);
long crc2 = TestRaidDfs.createTestFilePartialLastBlock(fileSys, file2,
1, 20, blockSize);
long file1Len = fileSys.getFileStatus(file1).getLen();
long file2Len = fileSys.getFileStatus(file2).getLen();
LOG.info("Test testMaxPendingJobs created test files");
// create an instance of the RaidNode
Configuration localConf = new Configuration(conf);
localConf.set(RaidNode.RAID_LOCATION_KEY, "/destraid");
localConf.setInt("raid.blockfix.interval", 1000);
localConf.set("raid.blockfix.classname",
"org.apache.hadoop.raid.DistBlockFixer");
localConf.setLong("raid.blockfix.filespertask", 2L);
localConf.setLong("raid.blockfix.maxpendingjobs", 1L);
try {
cnode = RaidNode.createRaidNode(null, localConf);
TestRaidDfs.waitForFileRaided(LOG, fileSys, file1, destPath);
TestRaidDfs.waitForFileRaided(LOG, fileSys, file2, destPath);
cnode.stop(); cnode.join();
FileStatus file1Stat = fileSys.getFileStatus(file1);
FileStatus file2Stat = fileSys.getFileStatus(file2);
DistributedFileSystem dfs = (DistributedFileSystem)fileSys;
LocatedBlocks file1Loc =
RaidDFSUtil.getBlockLocations(dfs, file1.toUri().getPath(),
0, file1Stat.getLen());
LocatedBlocks file2Loc =
RaidDFSUtil.getBlockLocations(dfs, file2.toUri().getPath(),
0, file2Stat.getLen());
String[] corruptFiles = DFSUtil.getCorruptFiles(dfs);
assertEquals("no corrupt files expected", 0, corruptFiles.length);
assertEquals("filesFixed() should return 0 before fixing files",
0, cnode.blockFixer.filesFixed());
// corrupt file1
int[] corruptBlockIdxs = new int[]{0, 4, 6};
for (int idx: corruptBlockIdxs)
corruptBlock(file1Loc.get(idx).getBlock().getBlockName());
reportCorruptBlocks(dfs, file1, corruptBlockIdxs, blockSize);
corruptFiles = DFSUtil.getCorruptFiles(dfs);
cnode = RaidNode.createRaidNode(null, localConf);
DistBlockFixer blockFixer = (DistBlockFixer) cnode.blockFixer;
long start = System.currentTimeMillis();
while (blockFixer.jobsRunning() < 1 &&
System.currentTimeMillis() - start < 240000) {
LOG.info("Test testBlockFix waiting for fixing job 1 to start");
Thread.sleep(10);
}
assertEquals("job not running", 1, blockFixer.jobsRunning());
// corrupt file2
for (int idx: corruptBlockIdxs)
corruptBlock(file2Loc.get(idx).getBlock().getBlockName());
reportCorruptBlocks(dfs, file2, corruptBlockIdxs, blockSize);
corruptFiles = DFSUtil.getCorruptFiles(dfs);
// wait until both files are fixed
while (blockFixer.filesFixed() < 2 &&
System.currentTimeMillis() - start < 240000) {
// make sure the block fixer does not start a second job while
// the first one is still running
assertTrue("too many jobs running", blockFixer.jobsRunning() <= 1);
Thread.sleep(10);
}
assertEquals("files not fixed", 2, blockFixer.filesFixed());
dfs = getDFS(conf, dfs);
try {
Thread.sleep(5*1000);
} catch (InterruptedException ignore) {
}
assertTrue("file not fixed",
TestRaidDfs.validateFile(dfs, file1, file1Len, crc1));
assertTrue("file not fixed",
TestRaidDfs.validateFile(dfs, file2, file2Len, crc2));
} catch (Exception e) {
LOG.info("Test testMaxPendingJobs exception " + e +
StringUtils.stringifyException(e));
throw e;
} finally {
myTearDown();
}
}
static class FakeDistBlockFixer extends DistBlockFixer {
Map<String, List<String>> submittedJobs =
new HashMap<String, List<String>>();
FakeDistBlockFixer(Configuration conf) {
super(conf);
}
@Override
void submitJob(Job job, List<String> filesInJob, int priority) {
LOG.info("Job " + job.getJobName() + " was submitted ");
submittedJobs.put(job.getJobName(), filesInJob);
}
}
public void testMultiplePriorities() throws Exception {
Path srcFile = new Path("/home/test/file1");
int repl = 1;
int numBlocks = 8;
long blockSize = 16384;
int stripeLength = 3;
Path destPath = new Path("/raidrs");
ErasureCodeType code = ErasureCodeType.RS;
mySetup(stripeLength, -1); // never har
try {
// Create test file and raid it.
TestRaidDfs.createTestFilePartialLastBlock(
fileSys, srcFile, repl, numBlocks, blockSize);
FileStatus stat = fileSys.getFileStatus(srcFile);
RaidNode.doRaid1(conf, stat,
destPath, code, new RaidNode.Statistics(), RaidUtils.NULL_PROGRESSABLE,
false, repl, repl, stripeLength);
// Corrupt first block of file.
int blockIdxToCorrupt = 1;
LOG.info("Corrupt block " + blockIdxToCorrupt + " of file " + srcFile);
LocatedBlocks locations = getBlockLocations(srcFile, stat.getLen());
corruptBlock(locations.get(blockIdxToCorrupt).getBlock().getBlockName());
reportCorruptBlocks(fileSys, srcFile, new int[]{1}, blockSize);
// Create Block Fixer and fix.
FakeDistBlockFixer distBlockFixer = new FakeDistBlockFixer(conf);
assertEquals(0, distBlockFixer.submittedJobs.size());
// One job should be submitted.
distBlockFixer.checkAndFixBlocks();
assertEquals(1, distBlockFixer.submittedJobs.size());
// No new job should be submitted since we already have one.
distBlockFixer.checkAndFixBlocks();
assertEquals(1, distBlockFixer.submittedJobs.size());
// Corrupt one more block.
blockIdxToCorrupt = 4;
LOG.info("Corrupt block " + blockIdxToCorrupt + " of file " + srcFile);
locations = getBlockLocations(srcFile, stat.getLen());
corruptBlock(locations.get(blockIdxToCorrupt).getBlock().getBlockName());
reportCorruptBlocks(fileSys, srcFile, new int[]{4}, blockSize);
// A new job should be submitted since two blocks are corrupt.
distBlockFixer.checkAndFixBlocks();
assertEquals(2, distBlockFixer.submittedJobs.size());
} finally {
myTearDown();
}
}
private static DistributedFileSystem getDFS(
Configuration conf, FileSystem dfs) throws IOException {
Configuration clientConf = new Configuration(conf);
clientConf.set("fs.hdfs.impl",
"org.apache.hadoop.hdfs.DistributedFileSystem");
clientConf.setBoolean("fs.hdfs.impl.disable.cache", true);
URI dfsUri = dfs.getUri();
FileSystem.closeAll();
return (DistributedFileSystem) FileSystem.get(dfsUri, clientConf);
}
private void mySetup(int stripeLength, int timeBeforeHar) throws Exception {
new File(TEST_DIR).mkdirs(); // Make sure data directory exists
conf = new Configuration();
conf.set("raid.config.file", CONFIG_FILE);
conf.setBoolean("raid.config.reload", true);
conf.setLong("raid.config.reload.interval", RELOAD_INTERVAL);
// scan all policies once every 5 second
conf.setLong("raid.policy.rescan.interval", 5000);
// make all deletions not go through Trash
conf.set("fs.shell.delete.classname", "org.apache.hadoop.hdfs.DFSClient");
// do not use map-reduce cluster for Raiding
conf.set("raid.classname", "org.apache.hadoop.raid.LocalRaidNode");
conf.set("raid.server.address", "localhost:0");
conf.setInt("hdfs.raid.stripeLength", stripeLength);
conf.set("hdfs.raid.locations", "/destraid");
conf.setBoolean("dfs.permissions", false);
dfs = new MiniDFSCluster(conf, NUM_DATANODES, true, null);
dfs.waitActive();
fileSys = dfs.getFileSystem();
namenode = fileSys.getUri().toString();
FileSystem.setDefaultUri(conf, namenode);
mr = new MiniMRCluster(4, namenode, 3);
jobTrackerName = "localhost:" + mr.getJobTrackerPort();
hftp = "hftp://localhost.localdomain:" + dfs.getNameNodePort();
FileSystem.setDefaultUri(conf, namenode);
conf.set("mapred.job.tracker", jobTrackerName);
FileWriter fileWriter = new FileWriter(CONFIG_FILE);
fileWriter.write("<?xml version=\"1.0\"?>\n");
String str = "<configuration> " +
"<srcPath prefix=\"/user/dhruba/raidtest\"> " +
"<policy name = \"RaidTest1\"> " +
"<erasureCode>xor</erasureCode> " +
"<destPath> /destraid</destPath> " +
"<property> " +
"<name>targetReplication</name> " +
"<value>1</value> " +
"<description>after RAIDing, decrease the replication factor of a file to this value." +
"</description> " +
"</property> " +
"<property> " +
"<name>metaReplication</name> " +
"<value>1</value> " +
"<description> replication factor of parity file" +
"</description> " +
"</property> " +
"<property> " +
"<name>modTimePeriod</name> " +
"<value>2000</value> " +
"<description> time (milliseconds) after a file is modified to make it " +
"a candidate for RAIDing " +
"</description> " +
"</property> ";
if (timeBeforeHar >= 0) {
str +=
"<property> " +
"<name>time_before_har</name> " +
"<value>" + timeBeforeHar + "</value> " +
"<description> amount of time waited before har'ing parity files" +
"</description> " +
"</property> ";
}
str +=
"</policy>" +
"</srcPath>" +
"</configuration>";
fileWriter.write(str);
fileWriter.close();
}
private void myTearDown() throws Exception {
if (cnode != null) { cnode.stop(); cnode.join(); }
if (mr != null) { mr.shutdown(); }
if (dfs != null) { dfs.shutdown(); }
}
private LocatedBlocks getBlockLocations(Path file, long length)
throws IOException {
DistributedFileSystem dfs = (DistributedFileSystem) fileSys;
return dfs.getClient().namenode.getBlockLocations(file.toString(),
0, length);
}
private long getCRC(FileSystem fs, Path p) throws IOException {
CRC32 crc = new CRC32();
FSDataInputStream stm = fs.open(p);
for (int b = 0; b > 0; b = stm.read()) {
crc.update(b);
}
stm.close();
return crc.getValue();
}
static boolean corruptReplica(String blockName, int replica)
throws IOException {
Random random = new Random();
String testDir = System.getProperty("test.build.data", "build/test/data") +
"/dfs/";
File baseDir = new File(testDir, "data");
boolean corrupted = false;
for (int i=replica*2; i<replica*2+2; i++) {
File blockFile = new File(baseDir, "data" + (i+1) +
"/current/" + blockName);
if (blockFile.exists()) {
// Corrupt replica by writing random bytes into replica
RandomAccessFile raFile = new RandomAccessFile(blockFile, "rw");
FileChannel channel = raFile.getChannel();
String badString = "BADBAD";
int rand = random.nextInt((int)channel.size()/2);
raFile.seek(rand);
raFile.write(badString.getBytes());
raFile.close();
corrupted = true;
}
}
return corrupted;
}
static void corruptBlock(String blockName) throws IOException {
boolean corrupted = false;
for (int i = 0; i < NUM_DATANODES; i++) {
corrupted |= corruptReplica(blockName, i);
}
assertTrue("could not corrupt block", corrupted);
}
static void reportCorruptBlocks(FileSystem fs, Path file, int[] idxs,
long blockSize) throws IOException {
FSDataInputStream in = fs.open(file);
try {
for (int idx: idxs) {
long offset = idx * blockSize;
LOG.info("Reporting corrupt block " + file + ":" + offset);
in.seek(offset);
try {
in.readFully(new byte[(int)blockSize]);
fail("Expected exception not thrown for " + file + ":" + offset);
} catch (org.apache.hadoop.fs.ChecksumException e) {
} catch (org.apache.hadoop.fs.BlockMissingException bme) {
}
}
} finally {
in.close();
}
}
}