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HDFS-16533. COMPOSITE_CRC failed between replicated file and striped file due to invalid requested length. (#4155) 

Co-authored-by: zengqiang.xu <zengqiang.xu@shopee.com>
This commit is contained in:
xuzq 2022-07-26 04:30:00 +08:00 committed by GitHub
parent bf8782d0ac
commit 01a2e0f6bd
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2 changed files with 37 additions and 14 deletions
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18
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/FileChecksumHelper.java
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@ -303,7 +303,8 @@ final class FileChecksumHelper {
byte[] blockChecksumBytes = blockChecksumBuf.getData();
long sumBlockLengths = 0;
for (int i = 0; i < locatedBlocks.size() - 1; ++i) {
int i = 0;
for (; i < locatedBlocks.size() - 1; ++i) {
LocatedBlock block = locatedBlocks.get(i);
// For everything except the last LocatedBlock, we expect getBlockSize()
// to accurately reflect the number of file bytes digested in the block
@ -316,19 +317,8 @@ final class FileChecksumHelper {
"Added blockCrc 0x{} for block index {} of size {}",
Integer.toString(blockCrc, 16), i, block.getBlockSize());
}
// NB: In some cases the located blocks have their block size adjusted
// explicitly based on the requested length, but not all cases;
// these numbers may or may not reflect actual sizes on disk.
long reportedLastBlockSize =
blockLocations.getLastLocatedBlock().getBlockSize();
long consumedLastBlockLength = reportedLastBlockSize;
if (length - sumBlockLengths < reportedLastBlockSize) {
LOG.warn(
"Last block length {} is less than reportedLastBlockSize {}",
length - sumBlockLengths, reportedLastBlockSize);
consumedLastBlockLength = length - sumBlockLengths;
}
LocatedBlock nextBlock = locatedBlocks.get(i);
long consumedLastBlockLength = Math.min(length - sumBlockLengths, nextBlock.getBlockSize());
// NB: blockChecksumBytes.length may be much longer than actual bytes
// written into the DataOutput.
int lastBlockCrc = CrcUtil.readInt(

33
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestFileChecksum.java
View File

@ -215,6 +215,39 @@ public class TestFileChecksum {
}
}
/**
* Test the corner case of the COMPOSITE_CRC.
* For Stripe File, last block size in the file is (int)(blockSize * 0.5),
* but the last block size in the check length is (int)(blockSize * 0.6).
* For Replicate File, the last block size in the file is (int)(blockSize * 0.5),
* but the last block size in the check length is ((dataBlocks - 1) * blockSize
* + (int) (blockSize * 0.6))
*/
@Test(timeout = 90000)
public void testStripedAndReplicatedFileChecksum2() throws Exception {
final int lastBlockSize = (int) (blockSize * 0.5);
final int fullStripeLength = dataBlocks * blockSize;
final int testFileSize = fullStripeLength + lastBlockSize;
prepareTestFiles(testFileSize, new String[] {stripedFile1, replicatedFile});
final int specialLength = (dataBlocks - 1) * blockSize
+ (int) (blockSize * 0.6);
Assert.assertTrue(specialLength % blockSize > lastBlockSize);
Assert.assertTrue(specialLength % fullStripeLength > lastBlockSize);
FileChecksum stripedFileChecksum = getFileChecksum(stripedFile1,
specialLength, false);
FileChecksum replicatedFileChecksum = getFileChecksum(replicatedFile,
specialLength, false);
if (checksumCombineMode.equals(ChecksumCombineMode.COMPOSITE_CRC.name())) {
Assert.assertEquals(replicatedFileChecksum, stripedFileChecksum);
} else {
Assert.assertNotEquals(replicatedFileChecksum, stripedFileChecksum);
}
}
@Test(timeout = 90000)
public void testDifferentBlockSizeReplicatedFileChecksum() throws Exception {
byte[] fileData = StripedFileTestUtil.generateBytes(fileSize);