/**
* 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.net.URI;
import java.util.LinkedList;
import java.util.List;
import java.util.Random;
import java.util.zip.CRC32;
import org.junit.Test;
import static org.junit.Assert.*;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.mapred.MiniMRCluster;
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.RaidDFSUtil;
import org.apache.hadoop.hdfs.TestRaidDfs;
import org.apache.hadoop.raid.RaidNode;
import org.apache.hadoop.raid.RaidUtils;
public class TestBlockFixer {
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();
/**
* 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<Path> files = new LinkedList<Path>();
// Paths that do not match the trash pattern.
Path p1 = new Path("/user/raid/raidtest/f1");
Path p2 = new Path("/user/.Trash/");
// Paths that match the trash pattern.
Path p3 = new Path("/user/raid/.Trash/raidtest/f1");
Path p4 = new Path("/user/raid/.Trash/");
files.add(p1);
files.add(p3);
files.add(p4);
files.add(p2);
Configuration conf = new Configuration();
RaidUtils.filterTrash(conf, files);
assertEquals("expected 2 non-trash files but got " + files.size(),
2, files.size());
for (Path p: files) {
assertTrue("wrong file returned by filterTrash",
p == p1 || p == p2);
}
}
@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.
*/
protected 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 = RaidDFSUtil.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());
reportCorruptBlocks(dfs, file1, corruptBlockIdxs, blockSize);
corruptFiles = RaidDFSUtil.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.
*/
protected 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 = RaidDFSUtil.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());
reportCorruptBlocks(dfs, file1, new int[]{0}, blockSize);
corruptFiles = RaidDFSUtil.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());
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.hdfs.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 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 testGeneratedLastBlockLocal() throws Exception {
generatedBlockTestCommon("testGeneratedLastBlock", 6, true);
}
@Test
public void testParityBlockFixLocal() throws Exception {
implParityBlockFix("testParityBlockFixLocal", true);
}
/**
* Corrupt a parity file and wait for it to get fixed.
*/
protected 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);
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 = RaidDFSUtil.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());
reportCorruptBlocks(dfs, parityFile, corruptBlockIdxs, blockSize);
corruptFiles = RaidDFSUtil.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 testParityHarBlockFixLocal() throws Exception {
implParityHarBlockFix("testParityHarBlockFixLocal", true);
}
protected 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");
// Parity file will have 7 blocks.
TestRaidDfs.createTestFilePartialLastBlock(fileSys, file1,
1, 20, blockSize);
LOG.info("Test " + testName + " created test files");
// create an instance of the RaidNode
// HAR block size = 2 * src block size = 2 * parity block size.
Configuration localConf = new Configuration(conf);
localConf.setLong("har.block.size", blockSize * 2);
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());
// 7 parity blocks => 4 har blocks.
assertEquals("wrong number of har blocks",
4, locs.getLocatedBlocks().size());
cnode.stop(); cnode.join();
String[] corruptFiles = RaidDFSUtil.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, 3};
for (int idx: corruptBlockIdxs)
corruptBlock(locs.get(idx).getBlock());
reportCorruptBlocks(dfs, partFile, corruptBlockIdxs,
partStat.getBlockSize());
corruptFiles = RaidDFSUtil.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.");
}
protected 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);
}
protected 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.Builder(conf).numDataNodes(NUM_DATANODES).build();
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();
}
protected void myTearDown() throws Exception {
if (cnode != null) { cnode.stop(); cnode.join(); }
if (mr != null) { mr.shutdown(); }
if (dfs != null) { dfs.shutdown(); }
}
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();
}
void corruptBlock(ExtendedBlock block) throws IOException {
assertTrue("Could not corrupt block",
dfs.corruptBlockOnDataNodes(block) > 0);
}
static void reportCorruptBlocks(FileSystem fs, Path file, int[] idxs,
long blockSize) throws IOException {
FSDataInputStream in = fs.open(file);
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.hdfs.BlockMissingException bme) {
}
}
}
}