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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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*/
package org.apache.cassandra.db;
import java.io.*;
import java.nio.ByteBuffer;
import java.util.zip.CRC32;
import java.util.zip.Checksum;
import org.junit.Test;
import org.apache.cassandra.SchemaLoader;
import org.apache.cassandra.db.commitlog.CommitLog;
import org.apache.cassandra.db.filter.QueryPath;
import static org.apache.cassandra.utils.ByteBufferUtil.bytes;
public class CommitLogTest extends SchemaLoader
{
@Test
public void testRecoveryWithEmptyLog() throws Exception
{
CommitLog.instance.recover(new File[]{ tmpFile() });
}
@Test
public void testRecoveryWithShortLog() throws Exception
{
// force EOF while reading log
testRecoveryWithBadSizeArgument(100, 10);
}
@Test
public void testRecoveryWithShortSize() throws Exception
{
testRecovery(new byte[2]);
}
@Test
public void testRecoveryWithShortCheckSum() throws Exception
{
testRecovery(new byte[6]);
}
@Test
public void testRecoveryWithGarbageLog() throws Exception
{
byte[] garbage = new byte[100];
(new java.util.Random()).nextBytes(garbage);
testRecovery(garbage);
}
@Test
public void testRecoveryWithBadSizeChecksum() throws Exception
{
Checksum checksum = new CRC32();
checksum.update(100);
testRecoveryWithBadSizeArgument(100, 100, ~checksum.getValue());
}
@Test
public void testRecoveryWithZeroSegmentSizeArgument() throws Exception
{
// many different combinations of 4 bytes (garbage) will be read as zero by readInt()
testRecoveryWithBadSizeArgument(0, 10); // zero size, but no EOF
}
@Test
public void testRecoveryWithNegativeSizeArgument() throws Exception
{
// garbage from a partial/bad flush could be read as a negative size even if there is no EOF
testRecoveryWithBadSizeArgument(-10, 10); // negative size, but no EOF
}
@Test
public void testDontDeleteIfDirty() throws Exception
{
CommitLog.instance.resetUnsafe();
// Roughly 32 MB mutation
RowMutation rm = new RowMutation("Keyspace1", bytes("k"));
rm.add(new QueryPath("Standard1", null, bytes("c1")), ByteBuffer.allocate(32 * 1024 * 1024), 0);
// Adding it 5 times
CommitLog.instance.add(rm);
CommitLog.instance.add(rm);
CommitLog.instance.add(rm);
CommitLog.instance.add(rm);
CommitLog.instance.add(rm);
// Adding new mutation on another CF
RowMutation rm2 = new RowMutation("Keyspace1", bytes("k"));
rm2.add(new QueryPath("Standard2", null, bytes("c1")), ByteBuffer.allocate(4), 0);
CommitLog.instance.add(rm2);
assert CommitLog.instance.activeSegments() == 2 : "Expecting 2 segments, got " + CommitLog.instance.activeSegments();
int cfid2 = rm2.getColumnFamilyIds().iterator().next();
CommitLog.instance.discardCompletedSegments(cfid2, CommitLog.instance.getContext().get());
// Assert we still have both our segment
assert CommitLog.instance.activeSegments() == 2 : "Expecting 2 segments, got " + CommitLog.instance.activeSegments();
}
@Test
public void testDeleteIfNotDirty() throws Exception
{
CommitLog.instance.resetUnsafe();
// Roughly 32 MB mutation
RowMutation rm = new RowMutation("Keyspace1", bytes("k"));
rm.add(new QueryPath("Standard1", null, bytes("c1")), ByteBuffer.allocate(32 * 1024 * 1024), 0);
// Adding it twice (won't change segment)
CommitLog.instance.add(rm);
CommitLog.instance.add(rm);
assert CommitLog.instance.activeSegments() == 1 : "Expecting 1 segment, got " + CommitLog.instance.activeSegments();
// "Flush": this won't delete anything
int cfid1 = rm.getColumnFamilyIds().iterator().next();
CommitLog.instance.discardCompletedSegments(cfid1, CommitLog.instance.getContext().get());
assert CommitLog.instance.activeSegments() == 1 : "Expecting 1 segment, got " + CommitLog.instance.activeSegments();
// Adding new mutation on another CF, large enough (including CL entry overhead) that a new segment is created
RowMutation rm2 = new RowMutation("Keyspace1", bytes("k"));
rm2.add(new QueryPath("Standard2", null, bytes("c1")), ByteBuffer.allocate(64 * 1024 * 1024), 0);
CommitLog.instance.add(rm2);
// also forces a new segment, since each entry-with-overhead is just over half the CL size
CommitLog.instance.add(rm2);
assert CommitLog.instance.activeSegments() == 3 : "Expecting 3 segments, got " + CommitLog.instance.activeSegments();
// "Flush" second cf: The first segment should be deleted since we
// didn't write anything on cf1 since last flush (and we flush cf2)
int cfid2 = rm2.getColumnFamilyIds().iterator().next();
CommitLog.instance.discardCompletedSegments(cfid2, CommitLog.instance.getContext().get());
// Assert we still have both our segment
assert CommitLog.instance.activeSegments() == 1 : "Expecting 1 segment, got " + CommitLog.instance.activeSegments();
}
// CASSANDRA-3615
@Test
public void testExceedSegmentSizeWithOverhead() throws Exception
{
CommitLog.instance.resetUnsafe();
RowMutation rm = new RowMutation("Keyspace1", bytes("k"));
rm.add(new QueryPath("Standard1", null, bytes("c1")), ByteBuffer.allocate((128 * 1024 * 1024) - 83), 0);
CommitLog.instance.add(rm);
}
protected void testRecoveryWithBadSizeArgument(int size, int dataSize) throws Exception
{
Checksum checksum = new CRC32();
checksum.update(size);
testRecoveryWithBadSizeArgument(size, dataSize, checksum.getValue());
}
protected void testRecoveryWithBadSizeArgument(int size, int dataSize, long checksum) throws Exception
{
ByteArrayOutputStream out = new ByteArrayOutputStream();
DataOutputStream dout = new DataOutputStream(out);
dout.writeInt(size);
dout.writeLong(checksum);
dout.write(new byte[dataSize]);
dout.close();
testRecovery(out.toByteArray());
}
protected File tmpFile() throws IOException
{
File logFile = File.createTempFile("testRecoveryWithPartiallyWrittenHeaderTestFile", null);
logFile.deleteOnExit();
assert logFile.length() == 0;
return logFile;
}
protected void testRecovery(byte[] logData) throws Exception
{
File logFile = tmpFile();
OutputStream lout = new FileOutputStream(logFile);
lout.write(logData);
//statics make it annoying to test things correctly
CommitLog.instance.recover(new File[]{ logFile }); //CASSANDRA-1119 / CASSANDRA-1179 throw on failure*/
}
}