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+/**
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+ * Licensed to the Apache Software Foundation (ASF) under one
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+ * or more contributor license agreements. See the NOTICE file
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+ * distributed with this work for additional information
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+ * regarding copyright ownership. The ASF licenses this file
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+ * to you under the Apache License, Version 2.0 (the
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+ * "License"); you may not use this file except in compliance
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+ * with the License. You may obtain a copy of the License at
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+ *
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+ * http://www.apache.org/licenses/LICENSE-2.0
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+ *
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+ * Unless required by applicable law or agreed to in writing, software
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+ * distributed under the License is distributed on an "AS IS" BASIS,
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+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ * See the License for the specific language governing permissions and
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+ * limitations under the License.
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+ */
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+package org.apache.hadoop.hdfs;
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+
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+import static org.junit.Assert.assertTrue;
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+
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+import java.io.IOException;
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+import java.util.Random;
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+
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+import org.apache.commons.logging.Log;
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+import org.apache.commons.logging.LogFactory;
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+import org.apache.commons.logging.impl.Log4JLogger;
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+import org.apache.hadoop.conf.Configuration;
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+import org.apache.hadoop.fi.FiTestUtil;
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+import org.apache.hadoop.fs.FSDataOutputStream;
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+import org.apache.hadoop.fs.Path;
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+import org.apache.hadoop.hdfs.server.datanode.BlockReceiverAspects;
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+import org.apache.hadoop.hdfs.server.datanode.DataNode;
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+import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
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+import org.apache.hadoop.hdfs.server.namenode.NameNode;
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+import org.apache.hadoop.test.GenericTestUtils;
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+import org.apache.log4j.Level;
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+import org.junit.After;
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+import org.junit.Before;
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+import org.junit.Test;
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+
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+public class TestFiPipelines {
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+ public static final Log LOG = LogFactory.getLog(TestFiPipelines.class);
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+
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+ private static short REPL_FACTOR = 3;
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+ private static final int RAND_LIMIT = 2000;
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+
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+ private MiniDFSCluster cluster;
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+ private DistributedFileSystem fs;
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+ private static Configuration conf;
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+ Random rand = new Random(RAND_LIMIT);
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+
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+ static {
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+ initLoggers();
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+ setConfiguration();
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+ }
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+
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+ @Before
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+ public void startUpCluster() throws IOException {
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+ cluster = new MiniDFSCluster(conf, REPL_FACTOR, true, null);
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+ fs = (DistributedFileSystem) cluster.getFileSystem();
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+ }
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+
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+ @After
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+ public void shutDownCluster() throws IOException {
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+ if (fs != null)
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+ fs.close();
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+ if (cluster != null)
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+ cluster.shutdown();
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+ }
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+
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+ /**
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+ * Test initiates and sets actions created by injection framework. The actions
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+ * work with both aspects of sending acknologment packets in a pipeline.
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+ * Creates and closes a file of certain length < packet size.
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+ * Injected actions will check if number of visible bytes at datanodes equals
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+ * to number of acknoleged bytes
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+ *
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+ * @throws IOException in case of an error
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+ */
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+ @Test
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+ public void pipeline_04() throws IOException {
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+ final String METHOD_NAME = GenericTestUtils.getMethodName();
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+ LOG.debug("Running " + METHOD_NAME);
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+
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+ final PipelinesTestUtil.PipelinesTest pipst =
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+ (PipelinesTestUtil.PipelinesTest) PipelinesTestUtil.initTest();
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+
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+ pipst.fiCallSetNumBytes.set(new PipelinesTestUtil.ReceivedCheckAction(METHOD_NAME));
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+ pipst.fiCallSetBytesAcked.set(new PipelinesTestUtil.AckedCheckAction(METHOD_NAME));
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+
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+ Path filePath = new Path("/" + METHOD_NAME + ".dat");
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+ FSDataOutputStream fsOut = fs.create(filePath);
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+ TestPipelines.writeData(fsOut, 2);
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+ fs.close();
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+ }
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+
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+ /**
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+ * Similar to pipeline_04 but sends many packets into a pipeline
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+ * @throws IOException in case of an error
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+ */
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+ @Test
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+ public void pipeline_05() throws IOException {
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+ final String METHOD_NAME = GenericTestUtils.getMethodName();
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+ LOG.debug("Running " + METHOD_NAME);
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+
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+ final PipelinesTestUtil.PipelinesTest pipst =
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+ (PipelinesTestUtil.PipelinesTest) PipelinesTestUtil.initTest();
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+
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+ pipst.fiCallSetNumBytes.set(new PipelinesTestUtil.ReceivedCheckAction(METHOD_NAME));
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+ pipst.fiCallSetBytesAcked.set(new PipelinesTestUtil.AckedCheckAction(METHOD_NAME));
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+
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+ Path filePath = new Path("/" + METHOD_NAME + ".dat");
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+ FSDataOutputStream fsOut = fs.create(filePath);
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+ for (int i = 0; i < 17; i++) {
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+ TestPipelines.writeData(fsOut, 23);
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+ }
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+ fs.close();
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+ }
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+
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+ /**
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+ * This quite tricky test prevents acknowledgement packets from a datanode
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+ * This should block any write attempts after ackQueue is full.
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+ * Test is blocking, so the MiniDFSCluster has to be killed harshly.
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+ * @throws IOException in case of an error
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+ */
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+ @Test
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+ public void pipeline_06() throws IOException {
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+ final String METHOD_NAME = GenericTestUtils.getMethodName();
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+ final int MAX_PACKETS = 80;
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+
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+ LOG.debug("Running " + METHOD_NAME);
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+
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+ final PipelinesTestUtil.PipelinesTest pipst =
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+ (PipelinesTestUtil.PipelinesTest) PipelinesTestUtil.initTest();
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+
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+ pipst.setSuspend(true); // This is ack. suspend test
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+ Path filePath = new Path("/" + METHOD_NAME + ".dat");
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+ FSDataOutputStream fsOut = fs.create(filePath);
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+
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+ int cnt = 0;
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+ try {
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+ // At this point let's start an external checker thread, which will
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+ // verify the test's results and shutdown the MiniDFSCluster for us,
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+ // because what it's gonna do has BLOCKING effect on datanodes
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+ QueueChecker cq = new QueueChecker(pipst, MAX_PACKETS);
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+ cq.start();
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+ // The following value is explained by the fact that size of a packet isn't
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+ // necessary equals to the value of
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+ // DFSConfigKeys.DFS_CLIENT_WRITE_PACKET_SIZE_KEY
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+ // The actual logic is expressed in DFSClient#computePacketChunkSize
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+ int bytesToSend = 700;
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+ while (cnt < 100 && pipst.getSuspend()) {
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+ LOG.debug("_06(): " + cnt++ + " sending another " + bytesToSend + " bytes");
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+ TestPipelines.writeData(fsOut, bytesToSend);
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+ }
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+ } catch (Exception e) {
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+ LOG.warn("Getting unexpected exception: ", e);
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+ }
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+ LOG.debug("Last queued packet number " + pipst.getLastQueued());
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+ assertTrue("Shouldn't be able to send more than 81 packet", pipst.getLastQueued() <= 81);
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+ }
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+
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+ private class QueueChecker extends Thread {
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+ PipelinesTestUtil.PipelinesTest test;
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+ final int MAX;
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+ boolean done = false;
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+
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+ public QueueChecker(PipelinesTestUtil.PipelinesTest handle, int maxPackets) {
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+ test = handle;
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+ MAX = maxPackets;
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+ }
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+
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+ @Override
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+ public void run() {
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+ while (!done) {
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+ LOG.debug("_06: checking for the limit " + test.getLastQueued() +
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+ " and " + MAX);
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+ if (test.getLastQueued() >= MAX) {
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+ LOG.debug("FI: Resume packets acking");
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+ test.setSuspend(false); //Do not suspend ack sending any more
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+ done = true;
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+ }
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+ if (!done)
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+ try {
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+ LOG.debug("_06: MAX isn't reached yet. Current=" + test.getLastQueued());
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+ sleep(100);
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+ } catch (InterruptedException e) { }
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+ }
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+
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+ assertTrue("Shouldn't be able to send more than 81 packet", test.getLastQueued() <= 81);
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+ try {
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+ LOG.debug("_06: shutting down the cluster");
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+ // It has to be done like that, because local version of shutDownCluster()
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+ // won't work, because it tries to close an instance of FileSystem too.
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+ // Which is where the waiting is happening.
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+ if (cluster !=null ) cluster.shutdown();
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+ } catch (Exception e) {
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+ e.printStackTrace();
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+ }
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+ LOG.debug("End QueueChecker thread");
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+ }
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+ }
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+
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+ private static void setConfiguration() {
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+ conf = new Configuration();
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+ int customPerChecksumSize = 700;
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+ int customBlockSize = customPerChecksumSize * 3;
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+ conf.setInt(DFSConfigKeys.DFS_CLIENT_WRITE_PACKET_SIZE_KEY, 100);
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+ conf.setInt(DFSConfigKeys.DFS_BYTES_PER_CHECKSUM_KEY, customPerChecksumSize);
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+ conf.setInt(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, customBlockSize);
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+ conf.setInt(DFSConfigKeys.DFS_CLIENT_WRITE_PACKET_SIZE_KEY, customBlockSize / 2);
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+ conf.setBoolean(DFSConfigKeys.DFS_SUPPORT_APPEND_KEY, true);
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+ conf.setInt(DFSConfigKeys.DFS_CLIENT_SOCKET_TIMEOUT_KEY, 0);
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+ }
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+
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+ private static void initLoggers() {
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+ ((Log4JLogger) NameNode.stateChangeLog).getLogger().setLevel(Level.ALL);
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+ ((Log4JLogger) FSNamesystem.LOG).getLogger().setLevel(Level.ALL);
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+ ((Log4JLogger) DataNode.LOG).getLogger().setLevel(Level.ALL);
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+ ((Log4JLogger) TestFiPipelines.LOG).getLogger().setLevel(Level.ALL);
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+ ((Log4JLogger) DFSClient.LOG).getLogger().setLevel(Level.ALL);
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+ ((Log4JLogger) FiTestUtil.LOG).getLogger().setLevel(Level.ALL);
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+ ((Log4JLogger) BlockReceiverAspects.LOG).getLogger().setLevel(Level.ALL);
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+ ((Log4JLogger) DFSClientAspects.LOG).getLogger().setLevel(Level.ALL);
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+ }
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+
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+}
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Konstantin Boudnik