org.apache.hadoop.hdfs.TestAvatarVerification.java Source code

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * 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 under the License.
 */
package org.apache.hadoop.hdfs;

import static org.junit.Assert.*;

import java.io.IOException;
import java.lang.reflect.Field;
import java.net.InetAddress;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.server.namenode.FSImageTestUtil.CheckpointTrigger;
import org.apache.hadoop.hdfs.util.InjectionEvent;
import org.apache.hadoop.ipc.RemoteException;
import org.apache.hadoop.util.InjectionEventI;
import org.apache.hadoop.util.InjectionHandler;

import org.junit.After;
import org.junit.BeforeClass;
import org.junit.Test;

public class TestAvatarVerification {

    final static Log LOG = LogFactory.getLog(TestAvatarCheckpointing.class);

    private MiniAvatarCluster cluster;
    private Configuration conf;

    @BeforeClass
    public static void setUpBeforeClass() throws Exception {
        MiniAvatarCluster.createAndStartZooKeeper();
    }

    @After
    public void tearDown() throws Exception {
        if (cluster != null) {
            cluster.shutDown();
        }
        InjectionHandler.clear();
        MiniAvatarCluster.clearAvatarDir();
    }

    @Test
    public void testVerificationAddress() throws Exception {
        LOG.info("------------------- test: testVerificationAddress START ----------------");
        TestAvatarVerificationHandler h = new TestAvatarVerificationHandler();
        InjectionHandler.set(h);
        MiniAvatarCluster.instantiationRetries = 2;

        conf = new Configuration();
        try {
            cluster = new MiniAvatarCluster(conf, 0, true, null, null);
            fail("Instantiation should not succeed");
        } catch (IOException e) {
            // exception during registration
            assertTrue("Should get remote exception here", e.getClass().equals(RemoteException.class));
        }
    }

    @Test
    public void testVerificationRoll() throws Exception {
        LOG.info("------------------- test: testVerificationRoll START ----------------");
        try {
            conf = new Configuration();
            cluster = new MiniAvatarCluster(conf, 1, true, null, null);

            // wait to separate checkpoints
            DFSTestUtil.waitNMilliSecond(500);

            TestAvatarVerificationHandler h = new TestAvatarVerificationHandler();
            InjectionHandler.set(h);

            try {
                h.doCheckpoint();
                fail("Checkpoint should not succeed");
            } catch (IOException e) {
                // exception during roll
                LOG.info("Expected exception", e);
                assertTrue("Should get remote exception here", e.getClass().equals(RemoteException.class));
            }
            assertTrue(h.receivedEvents.contains(InjectionEvent.STANDBY_EXIT_CHECKPOINT_FAILED_ROLL));
        } finally {
            if (cluster != null) {
                cluster.shutDown();
            }
        }
    }

    class TestAvatarVerificationHandler extends InjectionHandler {

        private CheckpointTrigger ckptTrigger = new CheckpointTrigger();
        public Set<InjectionEventI> receivedEvents = Collections.synchronizedSet(new HashSet<InjectionEventI>());

        @Override
        protected void _processEvent(InjectionEventI event, Object... args) {
            receivedEvents.add(event);
            if (event == InjectionEvent.NAMENODE_VERIFY_CHECKPOINTER) {
                InetAddress addr = (InetAddress) args[0];
                LOG.info("Processing event : " + event + " with address: " + addr);
                try {
                    Field f = addr.getClass().getSuperclass().getDeclaredField("address");
                    f.setAccessible(true);
                    f.set(addr, 0);
                    LOG.info("Changed address to : " + addr);
                } catch (Exception e) {
                    LOG.info("exception : ", e);
                    return;
                }
            }
            ckptTrigger.checkpointDone(event, args);
        }

        @Override
        protected boolean _falseCondition(InjectionEventI event, Object... args) {
            return ckptTrigger.triggerCheckpoint(event);
        }

        void doCheckpoint() throws Exception {
            ckptTrigger.doCheckpoint();
        }
    }
}