hbase-server/src/test/java/org/apache/hadoop/hbase/fs/TestBlockReorder.java - hbase - Git at Google

 /**
  * 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.hbase.fs;

 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.net.BindException;
 import java.net.ServerSocket;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.BlockLocation;
 import org.apache.hadoop.fs.FSDataInputStream;
 import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hbase.HBaseClassTestRule;
 import org.apache.hadoop.hbase.HBaseTestingUtility;
 import org.apache.hadoop.hbase.testclassification.LargeTests;
 import org.apache.hadoop.hbase.testclassification.MiscTests;
 import org.apache.hadoop.hdfs.DistributedFileSystem;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
 import org.apache.hadoop.hdfs.protocol.LocatedBlock;
 import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
 import org.apache.hadoop.hdfs.server.datanode.DataNode;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.ClassRule;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 import org.junit.rules.TestName;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

 /**
  * Tests for the hdfs fix from HBASE-6435.
  *
  * Please don't add new subtest which involves starting / stopping MiniDFSCluster in this class.
  * When stopping MiniDFSCluster, shutdown hooks would be cleared in hadoop's ShutdownHookManager
  *   in hadoop 3.
  * This leads to 'Failed suppression of fs shutdown hook' error in region server.
  */
 @Category({MiscTests.class, LargeTests.class})
 public class TestBlockReorder {

   @ClassRule
   public static final HBaseClassTestRule CLASS_RULE =
       HBaseClassTestRule.forClass(TestBlockReorder.class);

   private static final Logger LOG = LoggerFactory.getLogger(TestBlockReorder.class);

   private Configuration conf;
   private MiniDFSCluster cluster;
   private HBaseTestingUtility htu;
   private DistributedFileSystem dfs;
   private static final String host1 = "host1";
   private static final String host2 = "host2";
   private static final String host3 = "host3";

   @Rule
   public TestName name = new TestName();

   @Before
   public void setUp() throws Exception {
     htu = new HBaseTestingUtility();
     htu.getConfiguration().setInt("dfs.blocksize", 1024);// For the test with multiple blocks
     htu.getConfiguration().setInt("dfs.replication", 3);
     htu.startMiniDFSCluster(3,
         new String[]{"/r1", "/r2", "/r3"}, new String[]{host1, host2, host3});

     conf = htu.getConfiguration();
     cluster = htu.getDFSCluster();
     dfs = (DistributedFileSystem) FileSystem.get(conf);
   }

   @After
   public void tearDownAfterClass() throws Exception {
     htu.shutdownMiniCluster();
   }

   /**
    * Test that we're can add a hook, and that this hook works when we try to read the file in HDFS.
    */
   @Test
   public void testBlockLocationReorder() throws Exception {
     Path p = new Path("hello");

     Assert.assertTrue((short) cluster.getDataNodes().size() > 1);
     final int repCount = 2;

     // Let's write the file
     FSDataOutputStream fop = dfs.create(p, (short) repCount);
     final double toWrite = 875.5613;
     fop.writeDouble(toWrite);
     fop.close();

     // Let's check we can read it when everybody's there
     long start = System.currentTimeMillis();
     FSDataInputStream fin = dfs.open(p);
     Assert.assertTrue(toWrite == fin.readDouble());
     long end = System.currentTimeMillis();
     LOG.info("readtime= " + (end - start));
     fin.close();
     Assert.assertTrue((end - start) < 30 * 1000);

     // Let's kill the first location. But actually the fist location returned will change
     // The first thing to do is to get the location, then the port
     FileStatus f = dfs.getFileStatus(p);
     BlockLocation[] lbs;
     do {
       lbs = dfs.getFileBlockLocations(f, 0, 1);
     } while (lbs.length != 1 && lbs[0].getLength() != repCount);
     final String name = lbs[0].getNames()[0];
     Assert.assertTrue(name.indexOf(':') > 0);
     String portS = name.substring(name.indexOf(':') + 1);
     final int port = Integer.parseInt(portS);
     LOG.info("port= " + port);
     int ipcPort = -1;

     // Let's find the DN to kill. cluster.getDataNodes(int) is not on the same port, so we need
     // to iterate ourselves.
     boolean ok = false;
     final String lookup = lbs[0].getHosts()[0];
     StringBuilder sb = new StringBuilder();
     for (DataNode dn : cluster.getDataNodes()) {
       final String dnName = getHostName(dn);
       sb.append(dnName).append(' ');
       if (lookup.equals(dnName)) {
         ok = true;
         LOG.info("killing datanode " + name + " / " + lookup);
         ipcPort = dn.ipcServer.getListenerAddress().getPort();
         dn.shutdown();
         LOG.info("killed datanode " + name + " / " + lookup);
         break;
       }
     }
     Assert.assertTrue(
         "didn't find the server to kill, was looking for " + lookup + " found " + sb, ok);
     LOG.info("ipc port= " + ipcPort);

     // Add the hook, with an implementation checking that we don't use the port we've just killed.
     Assert.assertTrue(HFileSystem.addLocationsOrderInterceptor(conf,
         new HFileSystem.ReorderBlocks() {
           @Override
           public void reorderBlocks(Configuration c, LocatedBlocks lbs, String src) {
             for (LocatedBlock lb : lbs.getLocatedBlocks()) {
               if (lb.getLocations().length > 1) {
                 DatanodeInfo[] infos = lb.getLocations();
                 if (infos[0].getHostName().equals(lookup)) {
                   LOG.info("HFileSystem bad host, inverting");
                   DatanodeInfo tmp = infos[0];
                   infos[0] = infos[1];
                   infos[1] = tmp;
                 }
               }
             }
           }
         }));


     final int retries = 10;
     ServerSocket ss = null;
     ServerSocket ssI;
     try {
       ss = new ServerSocket(port);// We're taking the port to have a timeout issue later.
       ssI = new ServerSocket(ipcPort);
     } catch (BindException be) {
       LOG.warn("Got bind exception trying to set up socket on " + port + " or " + ipcPort +
           ", this means that the datanode has not closed the socket or" +
           " someone else took it. It may happen, skipping this test for this time.", be);
       if (ss != null) {
         ss.close();
       }
       return;
     }

     // Now it will fail with a timeout, unfortunately it does not always connect to the same box,
     // so we try retries times;  with the reorder it will never last more than a few milli seconds
     for (int i = 0; i < retries; i++) {
       start = System.currentTimeMillis();

       fin = dfs.open(p);
       Assert.assertTrue(toWrite == fin.readDouble());
       fin.close();
       end = System.currentTimeMillis();
       LOG.info("HFileSystem readtime= " + (end - start));
       Assert.assertFalse("We took too much time to read", (end - start) > 60000);
     }

     ss.close();
     ssI.close();
   }

   /**
    * Allow to get the hostname, using getHostName (hadoop 1) or getDisplayName (hadoop 2)
    */
   private String getHostName(DataNode dn) throws InvocationTargetException, IllegalAccessException {
     Method m;
     try {
       m = DataNode.class.getMethod("getDisplayName");
     } catch (NoSuchMethodException e) {
       try {
         m = DataNode.class.getMethod("getHostName");
       } catch (NoSuchMethodException e1) {
         throw new RuntimeException(e1);
       }
     }

     String res = (String) m.invoke(dn);
     if (res.contains(":")) {
       return res.split(":")[0];
     } else {
       return res;
     }
   }

 }
	/**
	* 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.hbase.fs;

	import java.lang.reflect.InvocationTargetException;
	import java.lang.reflect.Method;
	import java.net.BindException;
	import java.net.ServerSocket;
	import org.apache.hadoop.conf.Configuration;
	import org.apache.hadoop.fs.BlockLocation;
	import org.apache.hadoop.fs.FSDataInputStream;
	import org.apache.hadoop.fs.FSDataOutputStream;
	import org.apache.hadoop.fs.FileStatus;
	import org.apache.hadoop.fs.FileSystem;
	import org.apache.hadoop.fs.Path;
	import org.apache.hadoop.hbase.HBaseClassTestRule;
	import org.apache.hadoop.hbase.HBaseTestingUtility;
	import org.apache.hadoop.hbase.testclassification.LargeTests;
	import org.apache.hadoop.hbase.testclassification.MiscTests;
	import org.apache.hadoop.hdfs.DistributedFileSystem;
	import org.apache.hadoop.hdfs.MiniDFSCluster;
	import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
	import org.apache.hadoop.hdfs.protocol.LocatedBlock;
	import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
	import org.apache.hadoop.hdfs.server.datanode.DataNode;
	import org.junit.After;
	import org.junit.Assert;
	import org.junit.Before;
	import org.junit.ClassRule;
	import org.junit.Rule;
	import org.junit.Test;
	import org.junit.experimental.categories.Category;
	import org.junit.rules.TestName;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;

	/**
	* Tests for the hdfs fix from HBASE-6435.
	*
	* Please don't add new subtest which involves starting / stopping MiniDFSCluster in this class.
	* When stopping MiniDFSCluster, shutdown hooks would be cleared in hadoop's ShutdownHookManager
	* in hadoop 3.
	* This leads to 'Failed suppression of fs shutdown hook' error in region server.
	*/
	@Category({MiscTests.class, LargeTests.class})
	public class TestBlockReorder {

	@ClassRule
	public static final HBaseClassTestRule CLASS_RULE =
	HBaseClassTestRule.forClass(TestBlockReorder.class);

	private static final Logger LOG = LoggerFactory.getLogger(TestBlockReorder.class);

	private Configuration conf;
	private MiniDFSCluster cluster;
	private HBaseTestingUtility htu;
	private DistributedFileSystem dfs;
	private static final String host1 = "host1";
	private static final String host2 = "host2";
	private static final String host3 = "host3";

	@Rule
	public TestName name = new TestName();

	@Before
	public void setUp() throws Exception {
	htu = new HBaseTestingUtility();
	htu.getConfiguration().setInt("dfs.blocksize", 1024);// For the test with multiple blocks
	htu.getConfiguration().setInt("dfs.replication", 3);
	htu.startMiniDFSCluster(3,
	new String[]{"/r1", "/r2", "/r3"}, new String[]{host1, host2, host3});

	conf = htu.getConfiguration();
	cluster = htu.getDFSCluster();
	dfs = (DistributedFileSystem) FileSystem.get(conf);
	}

	@After
	public void tearDownAfterClass() throws Exception {
	htu.shutdownMiniCluster();
	}

	/**
	* Test that we're can add a hook, and that this hook works when we try to read the file in HDFS.
	*/
	@Test
	public void testBlockLocationReorder() throws Exception {
	Path p = new Path("hello");

	Assert.assertTrue((short) cluster.getDataNodes().size() > 1);
	final int repCount = 2;

	// Let's write the file
	FSDataOutputStream fop = dfs.create(p, (short) repCount);
	final double toWrite = 875.5613;
	fop.writeDouble(toWrite);
	fop.close();

	// Let's check we can read it when everybody's there
	long start = System.currentTimeMillis();
	FSDataInputStream fin = dfs.open(p);
	Assert.assertTrue(toWrite == fin.readDouble());
	long end = System.currentTimeMillis();
	LOG.info("readtime= " + (end - start));
	fin.close();
	Assert.assertTrue((end - start) < 30 * 1000);

	// Let's kill the first location. But actually the fist location returned will change
	// The first thing to do is to get the location, then the port
	FileStatus f = dfs.getFileStatus(p);
	BlockLocation[] lbs;
	do {
	lbs = dfs.getFileBlockLocations(f, 0, 1);
	} while (lbs.length != 1 && lbs[0].getLength() != repCount);
	final String name = lbs[0].getNames()[0];
	Assert.assertTrue(name.indexOf(':') > 0);
	String portS = name.substring(name.indexOf(':') + 1);
	final int port = Integer.parseInt(portS);
	LOG.info("port= " + port);
	int ipcPort = -1;

	// Let's find the DN to kill. cluster.getDataNodes(int) is not on the same port, so we need
	// to iterate ourselves.
	boolean ok = false;
	final String lookup = lbs[0].getHosts()[0];
	StringBuilder sb = new StringBuilder();
	for (DataNode dn : cluster.getDataNodes()) {
	final String dnName = getHostName(dn);
	sb.append(dnName).append(' ');
	if (lookup.equals(dnName)) {
	ok = true;
	LOG.info("killing datanode " + name + " / " + lookup);
	ipcPort = dn.ipcServer.getListenerAddress().getPort();
	dn.shutdown();
	LOG.info("killed datanode " + name + " / " + lookup);
	break;
	}
	}
	Assert.assertTrue(
	"didn't find the server to kill, was looking for " + lookup + " found " + sb, ok);
	LOG.info("ipc port= " + ipcPort);

	// Add the hook, with an implementation checking that we don't use the port we've just killed.
	Assert.assertTrue(HFileSystem.addLocationsOrderInterceptor(conf,
	new HFileSystem.ReorderBlocks() {
	@Override
	public void reorderBlocks(Configuration c, LocatedBlocks lbs, String src) {
	for (LocatedBlock lb : lbs.getLocatedBlocks()) {
	if (lb.getLocations().length > 1) {
	DatanodeInfo[] infos = lb.getLocations();
	if (infos[0].getHostName().equals(lookup)) {
	LOG.info("HFileSystem bad host, inverting");
	DatanodeInfo tmp = infos[0];
	infos[0] = infos[1];
	infos[1] = tmp;
	}
	}
	}
	}
	}));


	final int retries = 10;
	ServerSocket ss = null;
	ServerSocket ssI;
	try {
	ss = new ServerSocket(port);// We're taking the port to have a timeout issue later.
	ssI = new ServerSocket(ipcPort);
	} catch (BindException be) {
	LOG.warn("Got bind exception trying to set up socket on " + port + " or " + ipcPort +
	", this means that the datanode has not closed the socket or" +
	" someone else took it. It may happen, skipping this test for this time.", be);
	if (ss != null) {
	ss.close();
	}
	return;
	}

	// Now it will fail with a timeout, unfortunately it does not always connect to the same box,
	// so we try retries times; with the reorder it will never last more than a few milli seconds
	for (int i = 0; i < retries; i++) {
	start = System.currentTimeMillis();

	fin = dfs.open(p);
	Assert.assertTrue(toWrite == fin.readDouble());
	fin.close();
	end = System.currentTimeMillis();
	LOG.info("HFileSystem readtime= " + (end - start));
	Assert.assertFalse("We took too much time to read", (end - start) > 60000);
	}

	ss.close();
	ssI.close();
	}

	/**
	* Allow to get the hostname, using getHostName (hadoop 1) or getDisplayName (hadoop 2)
	*/
	private String getHostName(DataNode dn) throws InvocationTargetException, IllegalAccessException {
	Method m;
	try {
	m = DataNode.class.getMethod("getDisplayName");
	} catch (NoSuchMethodException e) {
	try {
	m = DataNode.class.getMethod("getHostName");
	} catch (NoSuchMethodException e1) {
	throw new RuntimeException(e1);
	}
	}

	String res = (String) m.invoke(dn);
	if (res.contains(":")) {
	return res.split(":")[0];
	} else {
	return res;
	}
	}

	}