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HBASE-27637 Zero length value would cause value compressor read nothing and not advance the position of the InputStream (#5025) 

Signed-off-by: Xiaolin Ha <haxiaolin@apache.org>
Signed-off-by: Andrew Purtell <apurtell@apache.org>
This commit is contained in:
Duo Zhang 2023-02-15 12:00:08 +08:00 committed by GitHub
parent 8ba56cccd3
commit 2bbe036e29
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 48 additions and 38 deletions
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18
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/CompressionContext.java
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@ -25,6 +25,7 @@ import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.EnumMap;
import java.util.Map;
import org.apache.commons.io.IOUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseInterfaceAudience;
import org.apache.hadoop.hbase.io.BoundedDelegatingInputStream;
@ -105,7 +106,7 @@ public class CompressionContext {
return compressed;
}
public int decompress(InputStream in, int inLength, byte[] outArray, int outOffset,
public void decompress(InputStream in, int inLength, byte[] outArray, int outOffset,
int outLength) throws IOException {
// Our input is a sequence of bounded byte ranges (call them segments), with
@ -122,11 +123,16 @@ public class CompressionContext {
} else {
lowerIn.setDelegate(in, inLength);
}
// Caller must handle short reads.
// With current Hadoop compression codecs all 'outLength' bytes are read in here, so not
// an issue for now.
return compressedIn.read(outArray, outOffset, outLength);
if (outLength == 0) {
// The BufferedInputStream will return earlier and skip reading anything if outLength == 0,
// but in fact for an empty value, the compressed output still contains some metadata so the
// compressed size is not 0, so here we need to manually skip inLength bytes otherwise the
// next read on this stream will start from an invalid position and cause critical problem,
// such as data loss when splitting wal or replicating wal.
IOUtils.skipFully(in, inLength);
} else {
IOUtils.readFully(compressedIn, outArray, outOffset, outLength);
}
}
public void clear() {

6
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/WALCellCodec.java
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@ -382,15 +382,11 @@ public class WALCellCodec implements Codec {
private void readCompressedValue(InputStream in, byte[] outArray, int outOffset,
int expectedLength) throws IOException {
int compressedLen = StreamUtils.readRawVarint32(in);
int read = compression.getValueCompressor().decompress(in, compressedLen, outArray, outOffset,
compression.getValueCompressor().decompress(in, compressedLen, outArray, outOffset,
expectedLength);
if (read != expectedLength) {
throw new IOException("ValueCompressor state error: short read");
}
}
}
public static class EnsureKvEncoder extends BaseEncoder {
public EnsureKvEncoder(OutputStream out) {
super(out);

42
hbase-server/src/test/java/org/apache/hadoop/hbase/wal/CompressedWALTestBase.java
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@ -17,6 +17,8 @@
*/
package org.apache.hadoop.hbase.wal;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.hasSize;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
@ -26,8 +28,9 @@ import java.util.NavigableMap;
import java.util.TreeMap;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellBuilderFactory;
import org.apache.hadoop.hbase.CellBuilderType;
import org.apache.hadoop.hbase.HBaseTestingUtil;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.RegionInfo;
import org.apache.hadoop.hbase.client.RegionInfoBuilder;
@ -82,33 +85,42 @@ public class CompressedWALTestBase {
for (int i = 0; i < total; i++) {
WALEdit kvs = new WALEdit();
kvs.add(new KeyValue(row, family, Bytes.toBytes(i), value));
kvs.add(CellBuilderFactory.create(CellBuilderType.SHALLOW_COPY).setType(Cell.Type.Put)
.setRow(row).setFamily(family).setQualifier(Bytes.toBytes(i)).setValue(value).build());
kvs.add(CellBuilderFactory.create(CellBuilderType.SHALLOW_COPY)
.setType(Cell.Type.DeleteFamily).setRow(row).setFamily(family).build());
wal.appendData(regionInfo, new WALKeyImpl(regionInfo.getEncodedNameAsBytes(), tableName,
System.currentTimeMillis(), mvcc, scopes), kvs);
}
wal.sync();
}
final Path walPath = AbstractFSWALProvider.getCurrentFileName(wal);
wals.shutdown();
// Confirm the WAL can be read back
WAL.Reader reader = wals.createReader(TEST_UTIL.getTestFileSystem(), walPath);
try (WAL.Reader reader = wals.createReader(TEST_UTIL.getTestFileSystem(), walPath)) {
int count = 0;
WAL.Entry entry = new WAL.Entry();
while (reader.next(entry) != null) {
count++;
List<Cell> cells = entry.getEdit().getCells();
assertTrue("Should be one KV per WALEdit", cells.size() == 1);
for (Cell cell : cells) {
assertTrue("Incorrect row", Bytes.equals(cell.getRowArray(), cell.getRowOffset(),
cell.getRowLength(), row, 0, row.length));
assertTrue("Incorrect family", Bytes.equals(cell.getFamilyArray(), cell.getFamilyOffset(),
cell.getFamilyLength(), family, 0, family.length));
assertTrue("Incorrect value", Bytes.equals(cell.getValueArray(), cell.getValueOffset(),
cell.getValueLength(), value, 0, value.length));
}
assertThat("Should be two KVs per WALEdit", cells, hasSize(2));
Cell putCell = cells.get(0);
assertEquals(Cell.Type.Put, putCell.getType());
assertTrue("Incorrect row", Bytes.equals(putCell.getRowArray(), putCell.getRowOffset(),
putCell.getRowLength(), row, 0, row.length));
assertTrue("Incorrect family", Bytes.equals(putCell.getFamilyArray(),
putCell.getFamilyOffset(), putCell.getFamilyLength(), family, 0, family.length));
assertTrue("Incorrect value", Bytes.equals(putCell.getValueArray(),
putCell.getValueOffset(), putCell.getValueLength(), value, 0, value.length));
Cell deleteCell = cells.get(1);
assertEquals(Cell.Type.DeleteFamily, deleteCell.getType());
assertTrue("Incorrect row", Bytes.equals(deleteCell.getRowArray(),
deleteCell.getRowOffset(), deleteCell.getRowLength(), row, 0, row.length));
assertTrue("Incorrect family", Bytes.equals(deleteCell.getFamilyArray(),
deleteCell.getFamilyOffset(), deleteCell.getFamilyLength(), family, 0, family.length));
}
assertEquals("Should have read back as many KVs as written", total, count);
reader.close();
}
}
}

6
hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestCompressedWALValueCompression.java
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@ -20,7 +20,6 @@ package org.apache.hadoop.hbase.wal;
import java.util.List;
import org.apache.hadoop.hbase.HBaseClassTestRule;
import org.apache.hadoop.hbase.HBaseCommonTestingUtil;
import org.apache.hadoop.hbase.HBaseTestingUtil;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.io.compress.Compression;
@ -46,9 +45,7 @@ public class TestCompressedWALValueCompression extends CompressedWALTestBase {
public static final HBaseClassTestRule CLASS_RULE =
HBaseClassTestRule.forClass(TestCompressedWALValueCompression.class);
private static final HBaseTestingUtil TEST_UTIL = new HBaseTestingUtil();
@Parameters
@Parameters(name = "{index}: compression={0}")
public static List<Object[]> params() {
return HBaseCommonTestingUtil.COMPRESSION_ALGORITHMS_PARAMETERIZED;
}
@ -81,5 +78,4 @@ public class TestCompressedWALValueCompression extends CompressedWALTestBase {
TableName tableName = TableName.valueOf(name.getMethodName().replaceAll("[^a-zA-Z0-9]", "_"));
doTest(tableName);
}
}