/**
* 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;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URI;
import java.security.PrivilegedExceptionAction;
import java.util.Random;
import org.apache.commons.logging.impl.Log4JLogger;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileChecksum;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.web.WebHdfsFileSystem;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.log4j.Level;
import org.junit.Test;
public class TestDistributedFileSystem {
private static final Random RAN = new Random();
{
((Log4JLogger)DFSClient.LOG).getLogger().setLevel(Level.ALL);
}
private boolean dualPortTesting = false;
private HdfsConfiguration getTestConfiguration() {
HdfsConfiguration conf = new HdfsConfiguration();
if (dualPortTesting) {
conf.set(DFSConfigKeys.DFS_NAMENODE_SERVICE_RPC_ADDRESS_KEY,
"localhost:0");
}
return conf;
}
@Test
public void testFileSystemCloseAll() throws Exception {
Configuration conf = getTestConfiguration();
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0).build();
URI address = FileSystem.getDefaultUri(conf);
try {
FileSystem.closeAll();
conf = getTestConfiguration();
FileSystem.setDefaultUri(conf, address);
FileSystem.get(conf);
FileSystem.get(conf);
FileSystem.closeAll();
}
finally {
if (cluster != null) {cluster.shutdown();}
}
}
/**
* Tests DFSClient.close throws no ConcurrentModificationException if
* multiple files are open.
* Also tests that any cached sockets are closed. (HDFS-3359)
*/
@Test
public void testDFSClose() throws Exception {
Configuration conf = getTestConfiguration();
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(2).build();
FileSystem fileSys = cluster.getFileSystem();
try {
// create two files, leaving them open
fileSys.create(new Path("/test/dfsclose/file-0"));
fileSys.create(new Path("/test/dfsclose/file-1"));
// create another file, close it, and read it, so
// the client gets a socket in its SocketCache
Path p = new Path("/non-empty-file");
DFSTestUtil.createFile(fileSys, p, 1L, (short)1, 0L);
DFSTestUtil.readFile(fileSys, p);
DFSClient client = ((DistributedFileSystem)fileSys).dfs;
SocketCache cache = client.socketCache;
assertEquals(1, cache.size());
fileSys.close();
assertEquals(0, cache.size());
} finally {
if (cluster != null) {cluster.shutdown();}
}
}
@Test
public void testDFSSeekExceptions() throws IOException {
Configuration conf = getTestConfiguration();
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(2).build();
FileSystem fileSys = cluster.getFileSystem();
try {
String file = "/test/fileclosethenseek/file-0";
Path path = new Path(file);
// create file
FSDataOutputStream output = fileSys.create(path);
output.writeBytes("Some test data to write longer than 10 bytes");
output.close();
FSDataInputStream input = fileSys.open(path);
input.seek(10);
boolean threw = false;
try {
input.seek(100);
} catch (IOException e) {
// success
threw = true;
}
assertTrue("Failed to throw IOE when seeking past end", threw);
input.close();
threw = false;
try {
input.seek(1);
} catch (IOException e) {
//success
threw = true;
}
assertTrue("Failed to throw IOE when seeking after close", threw);
fileSys.close();
}
finally {
if (cluster != null) {cluster.shutdown();}
}
}
@Test
public void testDFSClient() throws Exception {
Configuration conf = getTestConfiguration();
final long grace = 1000L;
MiniDFSCluster cluster = null;
try {
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(2).build();
final String filepathstring = "/test/LeaseChecker/foo";
final Path[] filepaths = new Path[4];
for(int i = 0; i < filepaths.length; i++) {
filepaths[i] = new Path(filepathstring + i);
}
final long millis = System.currentTimeMillis();
{
DistributedFileSystem dfs = (DistributedFileSystem)cluster.getFileSystem();
dfs.dfs.leaserenewer.setGraceSleepPeriod(grace);
assertFalse(dfs.dfs.leaserenewer.isRunning());
{
//create a file
final FSDataOutputStream out = dfs.create(filepaths[0]);
assertTrue(dfs.dfs.leaserenewer.isRunning());
//write something
out.writeLong(millis);
assertTrue(dfs.dfs.leaserenewer.isRunning());
//close
out.close();
Thread.sleep(grace/4*3);
//within grace period
assertTrue(dfs.dfs.leaserenewer.isRunning());
for(int i = 0; i < 3; i++) {
if (dfs.dfs.leaserenewer.isRunning()) {
Thread.sleep(grace/2);
}
}
//passed grace period
assertFalse(dfs.dfs.leaserenewer.isRunning());
}
{
//create file1
final FSDataOutputStream out1 = dfs.create(filepaths[1]);
assertTrue(dfs.dfs.leaserenewer.isRunning());
//create file2
final FSDataOutputStream out2 = dfs.create(filepaths[2]);
assertTrue(dfs.dfs.leaserenewer.isRunning());
//write something to file1
out1.writeLong(millis);
assertTrue(dfs.dfs.leaserenewer.isRunning());
//close file1
out1.close();
assertTrue(dfs.dfs.leaserenewer.isRunning());
//write something to file2
out2.writeLong(millis);
assertTrue(dfs.dfs.leaserenewer.isRunning());
//close file2
out2.close();
Thread.sleep(grace/4*3);
//within grace period
assertTrue(dfs.dfs.leaserenewer.isRunning());
}
{
//create file3
final FSDataOutputStream out3 = dfs.create(filepaths[3]);
assertTrue(dfs.dfs.leaserenewer.isRunning());
Thread.sleep(grace/4*3);
//passed previous grace period, should still running
assertTrue(dfs.dfs.leaserenewer.isRunning());
//write something to file3
out3.writeLong(millis);
assertTrue(dfs.dfs.leaserenewer.isRunning());
//close file3
out3.close();
assertTrue(dfs.dfs.leaserenewer.isRunning());
Thread.sleep(grace/4*3);
//within grace period
assertTrue(dfs.dfs.leaserenewer.isRunning());
for(int i = 0; i < 3; i++) {
if (dfs.dfs.leaserenewer.isRunning()) {
Thread.sleep(grace/2);
}
}
//passed grace period
assertFalse(dfs.dfs.leaserenewer.isRunning());
}
dfs.close();
}
{
// Check to see if opening a non-existent file triggers a FNF
FileSystem fs = cluster.getFileSystem();
Path dir = new Path("/wrwelkj");
assertFalse("File should not exist for test.", fs.exists(dir));
try {
FSDataInputStream in = fs.open(dir);
try {
in.close();
fs.close();
} finally {
assertTrue("Did not get a FileNotFoundException for non-existing" +
" file.", false);
}
} catch (FileNotFoundException fnf) {
// This is the proper exception to catch; move on.
}
}
{
DistributedFileSystem dfs = (DistributedFileSystem)cluster.getFileSystem();
assertFalse(dfs.dfs.leaserenewer.isRunning());
//open and check the file
FSDataInputStream in = dfs.open(filepaths[0]);
assertFalse(dfs.dfs.leaserenewer.isRunning());
assertEquals(millis, in.readLong());
assertFalse(dfs.dfs.leaserenewer.isRunning());
in.close();
assertFalse(dfs.dfs.leaserenewer.isRunning());
dfs.close();
}
{ // test accessing DFS with ip address. should work with any hostname
// alias or ip address that points to the interface that NameNode
// is listening on. In this case, it is localhost.
String uri = "hdfs://127.0.0.1:" + cluster.getNameNodePort() +
"/test/ipAddress/file";
Path path = new Path(uri);
FileSystem fs = FileSystem.get(path.toUri(), conf);
FSDataOutputStream out = fs.create(path);
byte[] buf = new byte[1024];
out.write(buf);
out.close();
FSDataInputStream in = fs.open(path);
in.readFully(buf);
in.close();
fs.close();
}
}
finally {
if (cluster != null) {cluster.shutdown();}
}
}
@Test
public void testStatistics() throws Exception {
int lsLimit = 2;
final Configuration conf = getTestConfiguration();
conf.setInt(DFSConfigKeys.DFS_LIST_LIMIT, lsLimit);
final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).build();
try {
final FileSystem fs = cluster.getFileSystem();
Path dir = new Path("/test");
Path file = new Path(dir, "file");
int readOps = DFSTestUtil.getStatistics(fs).getReadOps();
int writeOps = DFSTestUtil.getStatistics(fs).getWriteOps();
int largeReadOps = DFSTestUtil.getStatistics(fs).getLargeReadOps();
fs.mkdirs(dir);
checkStatistics(fs, readOps, ++writeOps, largeReadOps);
FSDataOutputStream out = fs.create(file, (short)1);
out.close();
checkStatistics(fs, readOps, ++writeOps, largeReadOps);
FileStatus status = fs.getFileStatus(file);
checkStatistics(fs, ++readOps, writeOps, largeReadOps);
fs.getFileBlockLocations(file, 0, 0);
checkStatistics(fs, ++readOps, writeOps, largeReadOps);
fs.getFileBlockLocations(status, 0, 0);
checkStatistics(fs, ++readOps, writeOps, largeReadOps);
FSDataInputStream in = fs.open(file);
in.close();
checkStatistics(fs, ++readOps, writeOps, largeReadOps);
fs.setReplication(file, (short)2);
checkStatistics(fs, readOps, ++writeOps, largeReadOps);
Path file1 = new Path(dir, "file1");
fs.rename(file, file1);
checkStatistics(fs, readOps, ++writeOps, largeReadOps);
fs.getContentSummary(file1);
checkStatistics(fs, ++readOps, writeOps, largeReadOps);
// Iterative ls test
for (int i = 0; i < 10; i++) {
Path p = new Path(dir, Integer.toString(i));
fs.mkdirs(p);
FileStatus[] list = fs.listStatus(dir);
if (list.length > lsLimit) {
// if large directory, then count readOps and largeReadOps by
// number times listStatus iterates
int iterations = (int)Math.ceil((double)list.length/lsLimit);
largeReadOps += iterations;
readOps += iterations;
} else {
// Single iteration in listStatus - no large read operation done
readOps++;
}
// writeOps incremented by 1 for mkdirs
// readOps and largeReadOps incremented by 1 or more
checkStatistics(fs, readOps, ++writeOps, largeReadOps);
}
fs.getStatus(file1);
checkStatistics(fs, ++readOps, writeOps, largeReadOps);
fs.getFileChecksum(file1);
checkStatistics(fs, ++readOps, writeOps, largeReadOps);
fs.setPermission(file1, new FsPermission((short)0777));
checkStatistics(fs, readOps, ++writeOps, largeReadOps);
fs.setTimes(file1, 0L, 0L);
checkStatistics(fs, readOps, ++writeOps, largeReadOps);
UserGroupInformation ugi = UserGroupInformation.getCurrentUser();
fs.setOwner(file1, ugi.getUserName(), ugi.getGroupNames()[0]);
checkStatistics(fs, readOps, ++writeOps, largeReadOps);
fs.delete(dir, true);
checkStatistics(fs, readOps, ++writeOps, largeReadOps);
} finally {
if (cluster != null) cluster.shutdown();
}
}
/** Checks statistics. -1 indicates do not check for the operations */
private void checkStatistics(FileSystem fs, int readOps, int writeOps, int largeReadOps) {
assertEquals(readOps, DFSTestUtil.getStatistics(fs).getReadOps());
assertEquals(writeOps, DFSTestUtil.getStatistics(fs).getWriteOps());
assertEquals(largeReadOps, DFSTestUtil.getStatistics(fs).getLargeReadOps());
}
@Test
public void testFileChecksum() throws Exception {
((Log4JLogger)HftpFileSystem.LOG).getLogger().setLevel(Level.ALL);
final long seed = RAN.nextLong();
System.out.println("seed=" + seed);
RAN.setSeed(seed);
final Configuration conf = getTestConfiguration();
conf.setBoolean(DFSConfigKeys.DFS_WEBHDFS_ENABLED_KEY, true);
conf.set(DFSConfigKeys.DFS_DATANODE_HOST_NAME_KEY, "localhost");
final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(2).build();
final FileSystem hdfs = cluster.getFileSystem();
final String nnAddr = conf.get(DFSConfigKeys.DFS_NAMENODE_HTTP_ADDRESS_KEY);
final UserGroupInformation current = UserGroupInformation.getCurrentUser();
final UserGroupInformation ugi = UserGroupInformation.createUserForTesting(
current.getShortUserName() + "x", new String[]{"user"});
try {
((DistributedFileSystem) hdfs).getFileChecksum(new Path(
"/test/TestNonExistingFile"));
fail("Expecting FileNotFoundException");
} catch (FileNotFoundException e) {
assertTrue("Not throwing the intended exception message", e.getMessage()
.contains("File does not exist: /test/TestNonExistingFile"));
}
try {
Path path = new Path("/test/TestExistingDir/");
hdfs.mkdirs(path);
((DistributedFileSystem) hdfs).getFileChecksum(path);
fail("Expecting FileNotFoundException");
} catch (FileNotFoundException e) {
assertTrue("Not throwing the intended exception message", e.getMessage()
.contains("File does not exist: /test/TestExistingDir"));
}
//hftp
final String hftpuri = "hftp://" + nnAddr;
System.out.println("hftpuri=" + hftpuri);
final FileSystem hftp = ugi.doAs(
new PrivilegedExceptionAction<FileSystem>() {
@Override
public FileSystem run() throws Exception {
return new Path(hftpuri).getFileSystem(conf);
}
});
//webhdfs
final String webhdfsuri = WebHdfsFileSystem.SCHEME + "://" + nnAddr;
System.out.println("webhdfsuri=" + webhdfsuri);
final FileSystem webhdfs = ugi.doAs(
new PrivilegedExceptionAction<FileSystem>() {
@Override
public FileSystem run() throws Exception {
return new Path(webhdfsuri).getFileSystem(conf);
}
});
final Path dir = new Path("/filechecksum");
final int block_size = 1024;
final int buffer_size = conf.getInt("io.file.buffer.size", 4096);
conf.setInt(DFSConfigKeys.DFS_BYTES_PER_CHECKSUM_KEY, 512);
//try different number of blocks
for(int n = 0; n < 5; n++) {
//generate random data
final byte[] data = new byte[RAN.nextInt(block_size/2-1)+n*block_size+1];
RAN.nextBytes(data);
System.out.println("data.length=" + data.length);
//write data to a file
final Path foo = new Path(dir, "foo" + n);
{
final FSDataOutputStream out = hdfs.create(foo, false, buffer_size,
(short)2, block_size);
out.write(data);
out.close();
}
//compute checksum
final FileChecksum hdfsfoocs = hdfs.getFileChecksum(foo);
System.out.println("hdfsfoocs=" + hdfsfoocs);
//hftp
final FileChecksum hftpfoocs = hftp.getFileChecksum(foo);
System.out.println("hftpfoocs=" + hftpfoocs);
final Path qualified = new Path(hftpuri + dir, "foo" + n);
final FileChecksum qfoocs = hftp.getFileChecksum(qualified);
System.out.println("qfoocs=" + qfoocs);
//webhdfs
final FileChecksum webhdfsfoocs = webhdfs.getFileChecksum(foo);
System.out.println("webhdfsfoocs=" + webhdfsfoocs);
final Path webhdfsqualified = new Path(webhdfsuri + dir, "foo" + n);
final FileChecksum webhdfs_qfoocs = webhdfs.getFileChecksum(webhdfsqualified);
System.out.println("webhdfs_qfoocs=" + webhdfs_qfoocs);
//write another file
final Path bar = new Path(dir, "bar" + n);
{
final FSDataOutputStream out = hdfs.create(bar, false, buffer_size,
(short)2, block_size);
out.write(data);
out.close();
}
{ //verify checksum
final FileChecksum barcs = hdfs.getFileChecksum(bar);
final int barhashcode = barcs.hashCode();
assertEquals(hdfsfoocs.hashCode(), barhashcode);
assertEquals(hdfsfoocs, barcs);
//hftp
assertEquals(hftpfoocs.hashCode(), barhashcode);
assertEquals(hftpfoocs, barcs);
assertEquals(qfoocs.hashCode(), barhashcode);
assertEquals(qfoocs, barcs);
//webhdfs
assertEquals(webhdfsfoocs.hashCode(), barhashcode);
assertEquals(webhdfsfoocs, barcs);
assertEquals(webhdfs_qfoocs.hashCode(), barhashcode);
assertEquals(webhdfs_qfoocs, barcs);
}
hdfs.setPermission(dir, new FsPermission((short)0));
{ //test permission error on hftp
try {
hftp.getFileChecksum(qualified);
fail();
} catch(IOException ioe) {
FileSystem.LOG.info("GOOD: getting an exception", ioe);
}
}
{ //test permission error on webhdfs
try {
webhdfs.getFileChecksum(webhdfsqualified);
fail();
} catch(IOException ioe) {
FileSystem.LOG.info("GOOD: getting an exception", ioe);
}
}
hdfs.setPermission(dir, new FsPermission((short)0777));
}
cluster.shutdown();
}
@Test
public void testAllWithDualPort() throws Exception {
dualPortTesting = true;
testFileSystemCloseAll();
testDFSClose();
testDFSClient();
testFileChecksum();
}
}