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From "Alexei Scherbakov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-6181) Tx is not rolled back on timeout leading to potential whole grid hang
Date Thu, 24 Aug 2017 17:02:00 GMT
Alexei Scherbakov created IGNITE-6181:
-----------------------------------------

             Summary: Tx is not rolled back on timeout leading to potential whole grid hang
                 Key: IGNITE-6181
                 URL: https://issues.apache.org/jira/browse/IGNITE-6181
             Project: Ignite
          Issue Type: Bug
    Affects Versions: 2.1
            Reporter: Alexei Scherbakov
             Fix For: 2.3


Unit test reproducer:

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 * this work for additional information regarding copyright ownership.
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 *
 *      http://www.apache.org/licenses/LICENSE-2.0
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 */

package org.apache.ignite.cache;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.ignite.Ignite;
import org.apache.ignite.IgniteException;
import org.apache.ignite.configuration.CacheConfiguration;
import org.apache.ignite.configuration.IgniteConfiguration;
import org.apache.ignite.configuration.TransactionConfiguration;
import org.apache.ignite.internal.IgniteInternalFuture;
import org.apache.ignite.internal.util.typedef.internal.U;
import org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi;
import org.apache.ignite.spi.discovery.tcp.ipfinder.vm.TcpDiscoveryVmIpFinder;
import org.apache.ignite.testframework.junits.common.GridCommonAbstractTest;
import org.apache.ignite.transactions.Transaction;
import org.apache.ignite.transactions.TransactionConcurrency;
import org.apache.ignite.transactions.TransactionIsolation;

/**
 * Tests ability to rollback not properly closed transaction.
 */
public class IgniteTxTimeoutTest extends GridCommonAbstractTest {
    /** */
    private static final long TX_TIMEOUT = 3_000L;

    /** */
    private static final String CACHE_NAME = "test";

    /** IP finder. */
    private static final TcpDiscoveryVmIpFinder IP_FINDER = new TcpDiscoveryVmIpFinder(true);

    /** */
    private final CountDownLatch l = new CountDownLatch(1);

    /** */
    private final Object mux = new Object();

    /** {@inheritDoc} */
    @Override protected IgniteConfiguration getConfiguration(String igniteInstanceName) throws
Exception {
        IgniteConfiguration cfg = super.getConfiguration(igniteInstanceName);

        cfg.setDiscoverySpi(new TcpDiscoverySpi().setIpFinder(IP_FINDER));

        TransactionConfiguration txCfg = new TransactionConfiguration();
        txCfg.setDefaultTxTimeout(TX_TIMEOUT);

        cfg.setTransactionConfiguration(txCfg);

        CacheConfiguration ccfg = new CacheConfiguration(CACHE_NAME);
        ccfg.setAtomicityMode(CacheAtomicityMode.TRANSACTIONAL);

        cfg.setCacheConfiguration(ccfg);

        return cfg;
    }

    /** */
    public void testTxTimeoutHandling() throws Exception {
        try {
            final Ignite ignite = startGrid();

            final AtomicBoolean released = new AtomicBoolean();

            multithreadedAsync(new Runnable() {
                @Override public void run() {
                    // Start tx with default settings.
                    try (Transaction tx = ignite.transactions().txStart()) {
                        ignite.cache(CACHE_NAME).put(1, 1);

                        l.countDown();

                        // Wait longer than default timeout.
                        synchronized (mux) {
                            while (!released.get()) {
                                try {
                                    mux.wait();
                                }
                                catch (InterruptedException e) {
                                    throw new IgniteException(e);
                                }
                            }
                        }

                        try {
                            tx.commit();

                            fail();
                        }
                        catch (IgniteException e) {
                            // Expect exception - tx is rolled back.
                        }
                    }
                }
            }, 1, "Locker");

            IgniteInternalFuture<?> fut2 = multithreadedAsync(new Runnable() {
                @Override public void run() {
                    U.awaitQuiet(l);

                    // Try to acquire lock.
                    // Acquisition will be successul then first transaction will be rolled
back after timeout.
                    try (Transaction tx = ignite.transactions().txStart(TransactionConcurrency.PESSIMISTIC,
                        TransactionIsolation.REPEATABLE_READ, 0, 1)) {
                        ignite.cache(CACHE_NAME).put(1, 1);

                        tx.commit();
                    }
                }
            }, 1, "Waiter");

            Thread.sleep(TX_TIMEOUT + 1_000);

            fut2.get(1, TimeUnit.SECONDS);
            
            startGrid();
            
            released.set(true);

            synchronized (mux) {
                mux.notify();
            }
        }
        finally {
            stopAllGrids();
        }
    }
}
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