| /** |
| * 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.contrib.bkjournal; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Random; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.bookkeeper.proto.BookieServer; |
| 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.EditLogInputStream; |
| import org.apache.hadoop.hdfs.server.namenode.EditLogOutputStream; |
| import org.apache.hadoop.hdfs.server.namenode.FSEditLogOp; |
| import org.apache.hadoop.hdfs.server.namenode.FSEditLogTestUtil; |
| import org.apache.hadoop.hdfs.server.namenode.NameNodeLayoutVersion; |
| import org.apache.hadoop.hdfs.server.protocol.NamespaceInfo; |
| import org.apache.zookeeper.ZooKeeper; |
| import org.junit.After; |
| import org.junit.AfterClass; |
| import org.junit.Before; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| |
| public class TestBookKeeperSpeculativeRead { |
| private static final Log LOG = LogFactory |
| .getLog(TestBookKeeperSpeculativeRead.class); |
| |
| private ZooKeeper zkc; |
| private static BKJMUtil bkutil; |
| private static int numLocalBookies = 1; |
| private static List<BookieServer> bks = new ArrayList<BookieServer>(); |
| |
| @BeforeClass |
| public static void setupBookkeeper() throws Exception { |
| bkutil = new BKJMUtil(1); |
| bkutil.start(); |
| } |
| |
| @AfterClass |
| public static void teardownBookkeeper() throws Exception { |
| bkutil.teardown(); |
| for (BookieServer bk : bks) { |
| bk.shutdown(); |
| } |
| } |
| |
| @Before |
| public void setup() throws Exception { |
| zkc = BKJMUtil.connectZooKeeper(); |
| } |
| |
| @After |
| public void teardown() throws Exception { |
| zkc.close(); |
| } |
| |
| private NamespaceInfo newNSInfo() { |
| Random r = new Random(); |
| return new NamespaceInfo(r.nextInt(), "testCluster", "TestBPID", -1); |
| } |
| |
| /** |
| * Test speculative read feature supported by bookkeeper. Keep one bookie |
| * alive and sleep all the other bookies. Non spec client will hang for long |
| * time to read the entries from the bookkeeper. |
| */ |
| @Test(timeout = 120000) |
| public void testSpeculativeRead() throws Exception { |
| // starting 9 more servers |
| for (int i = 1; i < 10; i++) { |
| bks.add(bkutil.newBookie()); |
| } |
| NamespaceInfo nsi = newNSInfo(); |
| Configuration conf = new Configuration(); |
| int ensembleSize = numLocalBookies + 9; |
| conf.setInt(BookKeeperJournalManager.BKJM_BOOKKEEPER_ENSEMBLE_SIZE, |
| ensembleSize); |
| conf.setInt(BookKeeperJournalManager.BKJM_BOOKKEEPER_QUORUM_SIZE, |
| ensembleSize); |
| conf.setInt( |
| BookKeeperJournalManager.BKJM_BOOKKEEPER_SPECULATIVE_READ_TIMEOUT_MS, |
| 100); |
| // sets 60 minute |
| conf.setInt( |
| BookKeeperJournalManager.BKJM_BOOKKEEPER_READ_ENTRY_TIMEOUT_SEC, 3600); |
| BookKeeperJournalManager bkjm = new BookKeeperJournalManager(conf, |
| BKJMUtil.createJournalURI("/hdfsjournal-specread"), nsi); |
| bkjm.format(nsi); |
| |
| final long numTransactions = 1000; |
| EditLogOutputStream out = bkjm.startLogSegment(1, |
| NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION); |
| for (long i = 1; i <= numTransactions; i++) { |
| FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance(); |
| op.setTransactionId(i); |
| out.write(op); |
| } |
| out.close(); |
| bkjm.finalizeLogSegment(1, numTransactions); |
| |
| List<EditLogInputStream> in = new ArrayList<EditLogInputStream>(); |
| bkjm.selectInputStreams(in, 1, true); |
| |
| // sleep 9 bk servers. Now only one server is running and responding to the |
| // clients |
| CountDownLatch sleepLatch = new CountDownLatch(1); |
| for (final BookieServer bookie : bks) { |
| sleepBookie(sleepLatch, bookie); |
| } |
| try { |
| assertEquals(numTransactions, |
| FSEditLogTestUtil.countTransactionsInStream(in.get(0))); |
| } finally { |
| in.get(0).close(); |
| sleepLatch.countDown(); |
| bkjm.close(); |
| } |
| } |
| |
| /** |
| * Sleep a bookie until I count down the latch |
| * |
| * @param latch |
| * latch to wait on |
| * @param bookie |
| * bookie server |
| * @throws Exception |
| */ |
| private void sleepBookie(final CountDownLatch latch, final BookieServer bookie) |
| throws Exception { |
| |
| Thread sleeper = new Thread() { |
| public void run() { |
| try { |
| bookie.suspendProcessing(); |
| latch.await(2, TimeUnit.MINUTES); |
| bookie.resumeProcessing(); |
| } catch (Exception e) { |
| LOG.error("Error suspending bookie", e); |
| } |
| } |
| }; |
| sleeper.setName("BookieServerSleeper-" + bookie.getBookie().getId()); |
| sleeper.start(); |
| } |
| } |