package org.infinispan.tx;
import org.infinispan.Cache;
import org.infinispan.commands.tx.PrepareCommand;
import org.infinispan.configuration.cache.CacheMode;
import org.infinispan.configuration.cache.ConfigurationBuilder;
import org.infinispan.context.impl.TxInvocationContext;
import org.infinispan.interceptors.base.CommandInterceptor;
import org.infinispan.test.MultipleCacheManagersTest;
import org.infinispan.test.TestingUtil;
import org.infinispan.transaction.impl.TransactionTable;
import org.infinispan.util.mocks.ControlledCommandFactory;
import org.testng.annotations.Test;
import java.util.concurrent.CountDownLatch;
import static org.testng.AssertJUnit.assertEquals;
import static org.testng.AssertJUnit.assertFalse;
/**
* Tests the following scenario:
* <pre>
* - tx1 originated on N1 writes a single key that maps to N2
* - tx1 prepares and before committing crashes
* - the prepare is blocked on N2 before reaching the TxInterceptor where the tx is created
* - TransactionTable.cleanupStaleTransactions kicks in on N2 but doesn't clean up the transaction
* as it hasn't been prepared yet
* - the prepare is now executed on N2
* - the test makes sure that the transaction doesn't acquire any locks and doesn't leak
* within N1
* </pre>
*
* @author Mircea Markus
* @since 5.2
*/
@Test(groups = "functional", testName = "tx.PrepareProcessedAfterOriginatorCrashTest")
public class PrepareProcessedAfterOriginatorCrashTest extends MultipleCacheManagersTest {
@Override
protected void createCacheManagers() throws Throwable {
ConfigurationBuilder dcc = getDefaultClusteredCacheConfig(CacheMode.DIST_SYNC, true);
dcc.clustering().hash().numOwners(1);
createClusteredCaches(2, dcc);
}
public void testBelatedTransactionDoesntLeak() throws Throwable {
final ControlledCommandFactory ccf = ControlledCommandFactory.registerControlledCommandFactory(advancedCache(1), PrepareCommand.class);
ccf.gate.close();
Cache receiver = cache(1);
BlockingPrepareInterceptor interceptor = new BlockingPrepareInterceptor();
advancedCache(1).addInterceptor(interceptor, 1);
final Object key = getKeyForCache(1);
fork(new Runnable() {
@Override
public void run() {
try {
cache(0).put(key, "v");
} catch (Throwable e) {
//possible as the node is being killed
}
}
});
eventually(new Condition() {
@Override
public boolean isSatisfied() throws Exception {
return ccf.blockTypeCommandsReceived.get() == 1;
}
});
killMember(0);
//give TransactionTable.cleanupStaleTransactions some time to run
Thread.sleep(5000);
ccf.gate.open();
interceptor.prepareExecuted.await();
log.trace("Finished waiting for belated prepare to complete");
final TransactionTable transactionTable = TestingUtil.getTransactionTable(receiver);
assertEquals(0, transactionTable.getRemoteTxCount());
assertEquals(0, transactionTable.getLocalTxCount());
assertFalse(receiver.getAdvancedCache().getLockManager().isLocked(key));
}
private static class BlockingPrepareInterceptor extends CommandInterceptor {
public final CountDownLatch prepareExecuted = new CountDownLatch(1);
@Override
public Object visitPrepareCommand(TxInvocationContext ctx, PrepareCommand command) throws Throwable {
try {
getLog().trace("Processing belated prepare");
return super.visitPrepareCommand(ctx, command);
} finally {
prepareExecuted.countDown();
}
}
}
}