/**
* 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.util.Random;
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.util.StringUtils;
import org.apache.hadoop.util.ToolRunner;
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.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.TestRaidDfs;
import org.apache.hadoop.hdfs.RaidDFSUtil;
import org.apache.hadoop.raid.RaidNode;
public class TestRaidShell extends TestCase {
final static Log LOG = LogFactory.getLog(
"org.apache.hadoop.raid.TestRaidShell");
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;
FileSystem fileSys = null;
RaidNode cnode = null;
Random rand = new Random();
/**
* Create a file with three stripes, corrupt a block each in two stripes,
* and wait for the the file to be fixed.
*/
public void testBlockFix() throws Exception {
LOG.info("Test testBlockFix started.");
long blockSize = 8192L;
int stripeLength = 3;
mySetup(stripeLength, -1);
Path file1 = new Path("/user/dhruba/raidtest/file1");
Path destPath = new Path("/destraid/user/dhruba/raidtest");
Path parityFile = new Path(destPath, "file1");
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);
// the RaidNode does the raiding inline (instead of submitting to map/reduce)
conf.set("raid.classname", "org.apache.hadoop.raid.LocalRaidNode");
conf.set("raid.blockfix.classname",
"org.apache.hadoop.raid.LocalBlockFixer");
cnode = RaidNode.createRaidNode(null, localConf);
try {
TestRaidDfs.waitForFileRaided(LOG, fileSys, file1, destPath);
cnode.stop();
cnode.join();
cnode = null;
FileStatus srcStat = fileSys.getFileStatus(file1);
LocatedBlocks locations = RaidDFSUtil.getBlockLocations(
(DistributedFileSystem) fileSys, file1.toUri().getPath(),
0, srcStat.getLen());
DistributedFileSystem dfs = (DistributedFileSystem)fileSys;
// Corrupt blocks in different stripes. We can fix them.
int[] corruptBlockIdxs = new int[]{0, 4, 6};
for (int idx: corruptBlockIdxs) {
LOG.info("Corrupting block " + locations.get(idx).getBlock());
corruptBlock(locations.get(idx).getBlock());
}
TestBlockFixer.reportCorruptBlocks(fileSys, file1, corruptBlockIdxs,
srcStat.getBlockSize());
waitForCorruptBlocks(corruptBlockIdxs.length, dfs, file1);
// Create RaidShell and fix the file.
RaidShell shell = new RaidShell(conf);
String[] args = new String[2];
args[0] = "-recoverBlocks";
args[1] = file1.toUri().getPath();
ToolRunner.run(shell, args);
waitForCorruptBlocks(0, dfs, file1);
assertTrue(TestRaidDfs.validateFile(dfs, file1, file1Len, crc1));
// Now corrupt and fix the parity file.
FileStatus parityStat = fileSys.getFileStatus(parityFile);
long parityCrc = getCRC(fileSys, parityFile);
locations = RaidDFSUtil.getBlockLocations(
dfs, parityFile.toUri().getPath(), 0, parityStat.getLen());
corruptBlock(locations.get(0).getBlock());
TestBlockFixer.reportCorruptBlocks(fileSys, parityFile, new int[]{0},
srcStat.getBlockSize());
waitForCorruptBlocks(1, dfs, parityFile);
args[1] = parityFile.toUri().getPath();
ToolRunner.run(shell, args);
waitForCorruptBlocks(0, dfs, file1);
assertEquals(parityCrc, getCRC(fileSys, parityFile));
} catch (Exception e) {
LOG.info("Test testBlockFix Exception " + e + StringUtils.stringifyException(e));
throw e;
} finally {
myTearDown();
}
LOG.info("Test testBlockFix completed.");
}
private void waitForCorruptBlocks(
int numCorruptBlocks, DistributedFileSystem dfs, Path file)
throws Exception {
String path = file.toUri().getPath();
FileStatus stat = dfs.getFileStatus(file);
long start = System.currentTimeMillis();
long actual = 0;
do {
actual = RaidDFSUtil.corruptBlocksInFile(
dfs, path, 0, stat.getLen()).size();
if (actual == numCorruptBlocks) break;
if (System.currentTimeMillis() - start > 120000) break;
LOG.info("Waiting for " + numCorruptBlocks + " corrupt blocks in " +
path + ", found " + actual);
Thread.sleep(1000);
} while (true);
assertEquals(numCorruptBlocks, actual);
}
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");
dfs = new MiniDFSCluster.Builder(conf).numDataNodes(NUM_DATANODES).build();
dfs.waitActive();
fileSys = dfs.getFileSystem();
namenode = fileSys.getUri().toString();
FileSystem.setDefaultUri(conf, namenode);
hftp = "hftp://localhost.localdomain:" + dfs.getNameNodePort();
FileSystem.setDefaultUri(conf, namenode);
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 (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);
}
}