/**
* 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.fs;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FSDataOutputStream;
import static org.apache.hadoop.fs.FileSystemTestHelper.*;
import org.apache.hadoop.conf.Configuration;
import org.junit.*;
import static org.junit.Assert.*;
public class TestChecksumFileSystem {
static final String TEST_ROOT_DIR
= System.getProperty("test.build.data","build/test/data/work-dir/localfs");
static LocalFileSystem localFs;
@Before
public void resetLocalFs() throws Exception {
localFs = FileSystem.getLocal(new Configuration());
localFs.setVerifyChecksum(true);
}
@Test
public void testgetChecksumLength() throws Exception {
assertEquals(8, ChecksumFileSystem.getChecksumLength(0L, 512));
assertEquals(12, ChecksumFileSystem.getChecksumLength(1L, 512));
assertEquals(12, ChecksumFileSystem.getChecksumLength(512L, 512));
assertEquals(16, ChecksumFileSystem.getChecksumLength(513L, 512));
assertEquals(16, ChecksumFileSystem.getChecksumLength(1023L, 512));
assertEquals(16, ChecksumFileSystem.getChecksumLength(1024L, 512));
assertEquals(408, ChecksumFileSystem.getChecksumLength(100L, 1));
assertEquals(4000000000008L,
ChecksumFileSystem.getChecksumLength(10000000000000L, 10));
}
@Test
public void testVerifyChecksum() throws Exception {
Path testPath = new Path(TEST_ROOT_DIR, "testPath");
Path testPath11 = new Path(TEST_ROOT_DIR, "testPath11");
FSDataOutputStream fout = localFs.create(testPath);
fout.write("testing".getBytes());
fout.close();
fout = localFs.create(testPath11);
fout.write("testing you".getBytes());
fout.close();
// Exercise some boundary cases - a divisor of the chunk size
// the chunk size, 2x chunk size, and +/-1 around these.
readFile(localFs, testPath, 128);
readFile(localFs, testPath, 511);
readFile(localFs, testPath, 512);
readFile(localFs, testPath, 513);
readFile(localFs, testPath, 1023);
readFile(localFs, testPath, 1024);
readFile(localFs, testPath, 1025);
localFs.delete(localFs.getChecksumFile(testPath), true);
assertTrue("checksum deleted", !localFs.exists(localFs.getChecksumFile(testPath)));
//copying the wrong checksum file
FileUtil.copy(localFs, localFs.getChecksumFile(testPath11), localFs,
localFs.getChecksumFile(testPath),false,true,localFs.getConf());
assertTrue("checksum exists", localFs.exists(localFs.getChecksumFile(testPath)));
boolean errorRead = false;
try {
readFile(localFs, testPath, 1024);
}catch(ChecksumException ie) {
errorRead = true;
}
assertTrue("error reading", errorRead);
//now setting verify false, the read should succeed
localFs.setVerifyChecksum(false);
String str = readFile(localFs, testPath, 1024).toString();
assertTrue("read", "testing".equals(str));
}
@Test
public void testMultiChunkFile() throws Exception {
Path testPath = new Path(TEST_ROOT_DIR, "testMultiChunk");
FSDataOutputStream fout = localFs.create(testPath);
for (int i = 0; i < 1000; i++) {
fout.write(("testing" + i).getBytes());
}
fout.close();
// Exercise some boundary cases - a divisor of the chunk size
// the chunk size, 2x chunk size, and +/-1 around these.
readFile(localFs, testPath, 128);
readFile(localFs, testPath, 511);
readFile(localFs, testPath, 512);
readFile(localFs, testPath, 513);
readFile(localFs, testPath, 1023);
readFile(localFs, testPath, 1024);
readFile(localFs, testPath, 1025);
}
/**
* Test to ensure that if the checksum file is truncated, a
* ChecksumException is thrown
*/
@Test
public void testTruncatedChecksum() throws Exception {
Path testPath = new Path(TEST_ROOT_DIR, "testtruncatedcrc");
FSDataOutputStream fout = localFs.create(testPath);
fout.write("testing truncation".getBytes());
fout.close();
// Read in the checksum
Path checksumFile = localFs.getChecksumFile(testPath);
FileSystem rawFs = localFs.getRawFileSystem();
FSDataInputStream checksumStream = rawFs.open(checksumFile);
byte buf[] = new byte[8192];
int read = checksumStream.read(buf, 0, buf.length);
checksumStream.close();
// Now rewrite the checksum file with the last byte missing
FSDataOutputStream replaceStream = rawFs.create(checksumFile);
replaceStream.write(buf, 0, read - 1);
replaceStream.close();
// Now reading the file should fail with a ChecksumException
try {
readFile(localFs, testPath, 1024);
fail("Did not throw a ChecksumException when reading truncated " +
"crc file");
} catch(ChecksumException ie) {
}
// telling it not to verify checksums, should avoid issue.
localFs.setVerifyChecksum(false);
String str = readFile(localFs, testPath, 1024).toString();
assertTrue("read", "testing truncation".equals(str));
}
@Test
public void testStreamType() throws Exception {
Path testPath = new Path(TEST_ROOT_DIR, "testStreamType");
localFs.create(testPath).close();
FSDataInputStream in = null;
localFs.setVerifyChecksum(true);
in = localFs.open(testPath);
assertTrue("stream is input checker",
in.getWrappedStream() instanceof FSInputChecker);
localFs.setVerifyChecksum(false);
in = localFs.open(testPath);
assertFalse("stream is not input checker",
in.getWrappedStream() instanceof FSInputChecker);
}
@Test
public void testCorruptedChecksum() throws Exception {
Path testPath = new Path(TEST_ROOT_DIR, "testCorruptChecksum");
Path checksumPath = localFs.getChecksumFile(testPath);
// write a file to generate checksum
FSDataOutputStream out = localFs.create(testPath, true);
out.write("testing 1 2 3".getBytes());
out.close();
assertTrue(localFs.exists(checksumPath));
FileStatus stat = localFs.getFileStatus(checksumPath);
// alter file directly so checksum is invalid
out = localFs.getRawFileSystem().create(testPath, true);
out.write("testing stale checksum".getBytes());
out.close();
assertTrue(localFs.exists(checksumPath));
// checksum didn't change on disk
assertEquals(stat, localFs.getFileStatus(checksumPath));
Exception e = null;
try {
localFs.setVerifyChecksum(true);
readFile(localFs, testPath, 1024);
} catch (ChecksumException ce) {
e = ce;
} finally {
assertNotNull("got checksum error", e);
}
localFs.setVerifyChecksum(false);
String str = readFile(localFs, testPath, 1024);
assertEquals("testing stale checksum", str);
}
@Test
public void testRenameFileToFile() throws Exception {
Path srcPath = new Path(TEST_ROOT_DIR, "testRenameSrc");
Path dstPath = new Path(TEST_ROOT_DIR, "testRenameDst");
verifyRename(srcPath, dstPath, false);
}
@Test
public void testRenameFileIntoDir() throws Exception {
Path srcPath = new Path(TEST_ROOT_DIR, "testRenameSrc");
Path dstPath = new Path(TEST_ROOT_DIR, "testRenameDir");
localFs.mkdirs(dstPath);
verifyRename(srcPath, dstPath, true);
}
@Test
public void testRenameFileIntoDirFile() throws Exception {
Path srcPath = new Path(TEST_ROOT_DIR, "testRenameSrc");
Path dstPath = new Path(TEST_ROOT_DIR, "testRenameDir/testRenameDst");
assertTrue(localFs.mkdirs(dstPath));
verifyRename(srcPath, dstPath, false);
}
void verifyRename(Path srcPath, Path dstPath, boolean dstIsDir)
throws Exception {
localFs.delete(srcPath,true);
localFs.delete(dstPath,true);
Path realDstPath = dstPath;
if (dstIsDir) {
localFs.mkdirs(dstPath);
realDstPath = new Path(dstPath, srcPath.getName());
}
// ensure file + checksum are moved
writeFile(localFs, srcPath, 1);
assertTrue(localFs.exists(localFs.getChecksumFile(srcPath)));
assertTrue(localFs.rename(srcPath, dstPath));
assertTrue(localFs.exists(localFs.getChecksumFile(realDstPath)));
// create a file with no checksum, rename, ensure dst checksum is removed
writeFile(localFs.getRawFileSystem(), srcPath, 1);
assertFalse(localFs.exists(localFs.getChecksumFile(srcPath)));
assertTrue(localFs.rename(srcPath, dstPath));
assertFalse(localFs.exists(localFs.getChecksumFile(realDstPath)));
// create file with checksum, rename over prior dst with no checksum
writeFile(localFs, srcPath, 1);
assertTrue(localFs.exists(localFs.getChecksumFile(srcPath)));
assertTrue(localFs.rename(srcPath, dstPath));
assertTrue(localFs.exists(localFs.getChecksumFile(realDstPath)));
}
}