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* 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.
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package org.apache.cassandra.db.commitlog;
import java.io.File;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Random;
import org.junit.Assert;
import org.junit.Assume;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.apache.cassandra.schema.TableMetadata;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.cql3.CQLTester;
import org.apache.cassandra.db.Keyspace;
import org.apache.cassandra.db.RowUpdateBuilder;
import org.apache.cassandra.db.commitlog.CommitLogSegment.CDCState;
import org.apache.cassandra.exceptions.WriteTimeoutException;
import org.apache.cassandra.io.util.FileUtils;
public class CommitLogSegmentManagerCDCTest extends CQLTester
{
private static Random random = new Random();
@BeforeClass
public static void checkConfig()
{
Assume.assumeTrue(DatabaseDescriptor.isCDCEnabled());
}
@Before
public void before() throws IOException
{
CommitLog.instance.resetUnsafe(true);
for (File f : new File(DatabaseDescriptor.getCDCLogLocation()).listFiles())
FileUtils.deleteWithConfirm(f);
}
@Test
public void testCDCWriteTimeout() throws Throwable
{
createTable("CREATE TABLE %s (idx int, data text, primary key(idx)) WITH cdc=true;");
CommitLogSegmentManagerCDC cdcMgr = (CommitLogSegmentManagerCDC)CommitLog.instance.segmentManager;
TableMetadata cfm = currentTableMetadata();
// Confirm that logic to check for whether or not we can allocate new CDC segments works
Integer originalCDCSize = DatabaseDescriptor.getCDCSpaceInMB();
try
{
DatabaseDescriptor.setCDCSpaceInMB(32);
// Spin until we hit CDC capacity and make sure we get a WriteTimeout
try
{
// Should trigger on anything < 20:1 compression ratio during compressed test
for (int i = 0; i < 100; i++)
{
new RowUpdateBuilder(cfm, 0, i)
.add("data", randomizeBuffer(DatabaseDescriptor.getCommitLogSegmentSize() / 3))
.build().apply();
}
Assert.fail("Expected WriteTimeoutException from full CDC but did not receive it.");
}
catch (WriteTimeoutException e)
{
// expected, do nothing
}
expectCurrentCDCState(CDCState.FORBIDDEN);
// Confirm we can create a non-cdc table and write to it even while at cdc capacity
createTable("CREATE TABLE %s (idx int, data text, primary key(idx)) WITH cdc=false;");
execute("INSERT INTO %s (idx, data) VALUES (1, '1');");
// Confirm that, on flush+recyle, we see files show up in cdc_raw
Keyspace.open(keyspace()).getColumnFamilyStore(currentTable()).forceBlockingFlush();
CommitLog.instance.forceRecycleAllSegments();
cdcMgr.awaitManagementTasksCompletion();
Assert.assertTrue("Expected files to be moved to overflow.", getCDCRawCount() > 0);
// Simulate a CDC consumer reading files then deleting them
for (File f : new File(DatabaseDescriptor.getCDCLogLocation()).listFiles())
FileUtils.deleteWithConfirm(f);
// Update size tracker to reflect deleted files. Should flip flag on current allocatingFrom to allow.
cdcMgr.updateCDCTotalSize();
expectCurrentCDCState(CDCState.PERMITTED);
}
finally
{
DatabaseDescriptor.setCDCSpaceInMB(originalCDCSize);
}
}
@Test
public void testCLSMCDCDiscardLogic() throws Throwable
{
CommitLogSegmentManagerCDC cdcMgr = (CommitLogSegmentManagerCDC)CommitLog.instance.segmentManager;
createTable("CREATE TABLE %s (idx int, data text, primary key(idx)) WITH cdc=false;");
for (int i = 0; i < 8; i++)
{
new RowUpdateBuilder(currentTableMetadata(), 0, i)
.add("data", randomizeBuffer(DatabaseDescriptor.getCommitLogSegmentSize() / 4)) // fit 3 in a segment
.build().apply();
}
// Should have 4 segments CDC since we haven't flushed yet, 3 PERMITTED, one of which is active, and 1 PERMITTED, in waiting
Assert.assertEquals(4 * DatabaseDescriptor.getCommitLogSegmentSize(), cdcMgr.updateCDCTotalSize());
expectCurrentCDCState(CDCState.PERMITTED);
CommitLog.instance.forceRecycleAllSegments();
// on flush, these PERMITTED should be deleted
Assert.assertEquals(0, new File(DatabaseDescriptor.getCDCLogLocation()).listFiles().length);
createTable("CREATE TABLE %s (idx int, data text, primary key(idx)) WITH cdc=true;");
for (int i = 0; i < 8; i++)
{
new RowUpdateBuilder(currentTableMetadata(), 0, i)
.add("data", randomizeBuffer(DatabaseDescriptor.getCommitLogSegmentSize() / 4))
.build().apply();
}
// 4 total again, 3 CONTAINS, 1 in waiting PERMITTED
Assert.assertEquals(4 * DatabaseDescriptor.getCommitLogSegmentSize(), cdcMgr.updateCDCTotalSize());
CommitLog.instance.forceRecycleAllSegments();
expectCurrentCDCState(CDCState.PERMITTED);
// On flush, PERMITTED is deleted, CONTAINS is preserved.
cdcMgr.awaitManagementTasksCompletion();
int seen = getCDCRawCount();
Assert.assertTrue("Expected >3 files in cdc_raw, saw: " + seen, seen >= 3);
}
@Test
public void testSegmentFlaggingOnCreation() throws Throwable
{
CommitLogSegmentManagerCDC cdcMgr = (CommitLogSegmentManagerCDC)CommitLog.instance.segmentManager;
String ct = createTable("CREATE TABLE %s (idx int, data text, primary key(idx)) WITH cdc=true;");
int origSize = DatabaseDescriptor.getCDCSpaceInMB();
try
{
DatabaseDescriptor.setCDCSpaceInMB(16);
TableMetadata ccfm = Keyspace.open(keyspace()).getColumnFamilyStore(ct).metadata();
// Spin until we hit CDC capacity and make sure we get a WriteTimeout
try
{
for (int i = 0; i < 1000; i++)
{
new RowUpdateBuilder(ccfm, 0, i)
.add("data", randomizeBuffer(DatabaseDescriptor.getCommitLogSegmentSize() / 3))
.build().apply();
}
Assert.fail("Expected WriteTimeoutException from full CDC but did not receive it.");
}
catch (WriteTimeoutException e) { }
expectCurrentCDCState(CDCState.FORBIDDEN);
CommitLog.instance.forceRecycleAllSegments();
cdcMgr.awaitManagementTasksCompletion();
new File(DatabaseDescriptor.getCDCLogLocation()).listFiles()[0].delete();
cdcMgr.updateCDCTotalSize();
// Confirm cdc update process changes flag on active segment
expectCurrentCDCState(CDCState.PERMITTED);
// Clear out archived CDC files
for (File f : new File(DatabaseDescriptor.getCDCLogLocation()).listFiles()) {
FileUtils.deleteWithConfirm(f);
}
// Set space to 0, confirm newly allocated segments are FORBIDDEN
DatabaseDescriptor.setCDCSpaceInMB(0);
CommitLog.instance.forceRecycleAllSegments();
CommitLog.instance.segmentManager.awaitManagementTasksCompletion();
expectCurrentCDCState(CDCState.FORBIDDEN);
}
finally
{
DatabaseDescriptor.setCDCSpaceInMB(origSize);
}
}
private ByteBuffer randomizeBuffer(int size)
{
byte[] toWrap = new byte[size];
random.nextBytes(toWrap);
return ByteBuffer.wrap(toWrap);
}
private int getCDCRawCount()
{
return new File(DatabaseDescriptor.getCDCLogLocation()).listFiles().length;
}
private void expectCurrentCDCState(CDCState state)
{
Assert.assertEquals("Received unexpected CDCState on current allocatingFrom segment.",
state, CommitLog.instance.segmentManager.allocatingFrom().getCDCState());
}
}