hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestPendingInvalidateBlock.java - hadoop - 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.hdfs.server.blockmanagement;

 import java.lang.reflect.Method;

 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.CommonConfigurationKeys;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hdfs.DFSClient;
 import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.DFSTestUtil;
 import org.apache.hadoop.hdfs.DistributedFileSystem;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.hdfs.MiniDFSCluster.DataNodeProperties;
 import org.apache.hadoop.hdfs.protocol.ClientProtocol;
 import org.apache.hadoop.hdfs.server.datanode.DataNodeTestUtils;
 import org.apache.hadoop.test.GenericTestUtils;
 import org.apache.log4j.Level;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
 import org.mockito.Mockito;
 import org.mockito.internal.util.reflection.Whitebox;

 import com.google.common.base.Supplier;

 /**
  * Test if we can correctly delay the deletion of blocks.
  */
 public class TestPendingInvalidateBlock {
   {
     GenericTestUtils.setLogLevel(BlockManager.LOG, Level.DEBUG);
   }

   private static final int BLOCKSIZE = 1024;
   private static final short REPLICATION = 2;

   private Configuration conf;
   private MiniDFSCluster cluster;
   private DistributedFileSystem dfs;

   @Before
   public void setUp() throws Exception {
     conf = new Configuration();
     conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, BLOCKSIZE);
     // block deletion pending period
     conf.setLong(DFSConfigKeys.DFS_NAMENODE_STARTUP_DELAY_BLOCK_DELETION_SEC_KEY, 5L);
     // set the block report interval to 2s
     conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY, 2000);
     conf.setLong(DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY, 1);
     conf.setInt(DFSConfigKeys.DFS_NAMENODE_REPLICATION_INTERVAL_KEY, 1);
     // disable the RPC timeout for debug
     conf.setLong(CommonConfigurationKeys.IPC_PING_INTERVAL_KEY, 0);
     cluster = new MiniDFSCluster.Builder(conf).numDataNodes(REPLICATION)
         .build();
     cluster.waitActive();
     dfs = cluster.getFileSystem();
   }

   @After
   public void tearDown() throws Exception {
     if (cluster != null) {
       cluster.shutdown();
       cluster = null;
     }
   }

   @Test
   public void testPendingDeletion() throws Exception {
     final Path foo = new Path("/foo");
     DFSTestUtil.createFile(dfs, foo, BLOCKSIZE, REPLICATION, 0);
     DFSTestUtil.waitForReplication(dfs, foo, REPLICATION, 10000);

     // restart NN
     cluster.restartNameNode(true);
     InvalidateBlocks invalidateBlocks =
         (InvalidateBlocks) Whitebox.getInternalState(cluster.getNamesystem()
             .getBlockManager(), "invalidateBlocks");
     InvalidateBlocks mockIb = Mockito.spy(invalidateBlocks);
     // Return invalidation delay to delay the block's deletion
     Mockito.doReturn(1L).when(mockIb).getInvalidationDelay();
     Whitebox.setInternalState(cluster.getNamesystem().getBlockManager(),
         "invalidateBlocks", mockIb);
     dfs.delete(foo, true);

     waitForNumPendingDeletionBlocks(REPLICATION);
     Assert.assertEquals(0, cluster.getNamesystem().getBlocksTotal());
     Assert.assertEquals(REPLICATION, cluster.getNamesystem()
         .getPendingDeletionBlocks());
     Assert.assertEquals(REPLICATION,
         dfs.getPendingDeletionBlocksCount());
     Mockito.doReturn(0L).when(mockIb).getInvalidationDelay();

     waitForNumPendingDeletionBlocks(0);
     Assert.assertEquals(0, cluster.getNamesystem().getBlocksTotal());
     Assert.assertEquals(0, cluster.getNamesystem().getPendingDeletionBlocks());
     Assert.assertEquals(0, dfs.getPendingDeletionBlocksCount());
     long nnStarted = cluster.getNamesystem().getNNStartedTimeInMillis();
     long blockDeletionStartTime = cluster.getNamesystem()
         .getBlockDeletionStartTime();
     Assert.assertTrue(String.format(
         "Expect blockDeletionStartTime = %d > nnStarted = %d.",
         blockDeletionStartTime, nnStarted), blockDeletionStartTime > nnStarted);

     // test client protocol compatibility
     Method method = DFSClient.class.
         getDeclaredMethod("getStateByIndex", int.class);
     method.setAccessible(true);
     // get number of pending deletion blocks by its index
     long validState = (Long) method.invoke(dfs.getClient(),
         ClientProtocol.GET_STATS_PENDING_DELETION_BLOCKS_IDX);
     // get an out of index value
     long invalidState = (Long) method.invoke(dfs.getClient(),
         ClientProtocol.STATS_ARRAY_LENGTH);
     Assert.assertEquals(0, validState);
     Assert.assertEquals(-1, invalidState);
   }

   /**
    * Test whether we can delay the deletion of unknown blocks in DataNode's
    * first several block reports.
    */
   @Test
   public void testPendingDeleteUnknownBlocks() throws Exception {
     final int fileNum = 5; // 5 files
     final Path[] files = new Path[fileNum];
     final DataNodeProperties[] dnprops = new DataNodeProperties[REPLICATION];
     // create a group of files, each file contains 1 block
     for (int i = 0; i < fileNum; i++) {
       files[i] = new Path("/file" + i);
       DFSTestUtil.createFile(dfs, files[i], BLOCKSIZE, REPLICATION, i);
     }
     // wait until all DataNodes have replicas
     waitForReplication();
     for (int i = REPLICATION - 1; i >= 0; i--) {
       dnprops[i] = cluster.stopDataNode(i);
     }
     Thread.sleep(2000);
     // delete 2 files, we still have 3 files remaining so that we can cover
     // every DN storage
     for (int i = 0; i < 2; i++) {
       dfs.delete(files[i], true);
     }

     // restart NameNode
     cluster.restartNameNode(false);
     InvalidateBlocks invalidateBlocks = (InvalidateBlocks) Whitebox
         .getInternalState(cluster.getNamesystem().getBlockManager(),
             "invalidateBlocks");
     InvalidateBlocks mockIb = Mockito.spy(invalidateBlocks);
     Mockito.doReturn(1L).when(mockIb).getInvalidationDelay();
     Whitebox.setInternalState(cluster.getNamesystem().getBlockManager(),
         "invalidateBlocks", mockIb);

     Assert.assertEquals(0L, cluster.getNamesystem().getPendingDeletionBlocks());
     // restart DataNodes
     for (int i = 0; i < REPLICATION; i++) {
       cluster.restartDataNode(dnprops[i]);
     }
     cluster.waitActive();

     for (int i = 0; i < REPLICATION; i++) {
       DataNodeTestUtils.triggerBlockReport(cluster.getDataNodes().get(i));
     }
     Thread.sleep(2000);
     // make sure we have received block reports by checking the total block #
     Assert.assertEquals(3, cluster.getNamesystem().getBlocksTotal());
     Assert.assertEquals(4, cluster.getNamesystem().getPendingDeletionBlocks());

     cluster.restartNameNode(true);
     waitForNumPendingDeletionBlocks(0);
     Assert.assertEquals(3, cluster.getNamesystem().getBlocksTotal());
     Assert.assertEquals(0, cluster.getNamesystem().getPendingDeletionBlocks());
   }

   private long waitForReplication() throws Exception {
     for (int i = 0; i < 10; i++) {
       long ur = cluster.getNamesystem().getUnderReplicatedBlocks();
       if (ur == 0) {
         return 0;
       } else {
         Thread.sleep(1000);
       }
     }
     return cluster.getNamesystem().getUnderReplicatedBlocks();
   }

   private void waitForNumPendingDeletionBlocks(final int numBlocks)
       throws Exception {
     GenericTestUtils.waitFor(new Supplier<Boolean>() {

       @Override
       public Boolean get() {
         try {
           cluster.triggerBlockReports();

           if (cluster.getNamesystem().getPendingDeletionBlocks()
               == numBlocks) {
             return true;
           }
         } catch (Exception e) {
           // Ignore the exception
         }

         return false;
       }
     }, 6000, 60000);
   }
 }
	/**
	* 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.server.blockmanagement;

	import java.lang.reflect.Method;

	import org.apache.hadoop.conf.Configuration;
	import org.apache.hadoop.fs.CommonConfigurationKeys;
	import org.apache.hadoop.fs.Path;
	import org.apache.hadoop.hdfs.DFSClient;
	import org.apache.hadoop.hdfs.DFSConfigKeys;
	import org.apache.hadoop.hdfs.DFSTestUtil;
	import org.apache.hadoop.hdfs.DistributedFileSystem;
	import org.apache.hadoop.hdfs.MiniDFSCluster;
	import org.apache.hadoop.hdfs.MiniDFSCluster.DataNodeProperties;
	import org.apache.hadoop.hdfs.protocol.ClientProtocol;
	import org.apache.hadoop.hdfs.server.datanode.DataNodeTestUtils;
	import org.apache.hadoop.test.GenericTestUtils;
	import org.apache.log4j.Level;
	import org.junit.After;
	import org.junit.Assert;
	import org.junit.Before;
	import org.junit.Test;
	import org.mockito.Mockito;
	import org.mockito.internal.util.reflection.Whitebox;

	import com.google.common.base.Supplier;

	/**
	* Test if we can correctly delay the deletion of blocks.
	*/
	public class TestPendingInvalidateBlock {
	{
	GenericTestUtils.setLogLevel(BlockManager.LOG, Level.DEBUG);
	}

	private static final int BLOCKSIZE = 1024;
	private static final short REPLICATION = 2;

	private Configuration conf;
	private MiniDFSCluster cluster;
	private DistributedFileSystem dfs;

	@Before
	public void setUp() throws Exception {
	conf = new Configuration();
	conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, BLOCKSIZE);
	// block deletion pending period
	conf.setLong(DFSConfigKeys.DFS_NAMENODE_STARTUP_DELAY_BLOCK_DELETION_SEC_KEY, 5L);
	// set the block report interval to 2s
	conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY, 2000);
	conf.setLong(DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY, 1);
	conf.setInt(DFSConfigKeys.DFS_NAMENODE_REPLICATION_INTERVAL_KEY, 1);
	// disable the RPC timeout for debug
	conf.setLong(CommonConfigurationKeys.IPC_PING_INTERVAL_KEY, 0);
	cluster = new MiniDFSCluster.Builder(conf).numDataNodes(REPLICATION)
	.build();
	cluster.waitActive();
	dfs = cluster.getFileSystem();
	}

	@After
	public void tearDown() throws Exception {
	if (cluster != null) {
	cluster.shutdown();
	cluster = null;
	}
	}

	@Test
	public void testPendingDeletion() throws Exception {
	final Path foo = new Path("/foo");
	DFSTestUtil.createFile(dfs, foo, BLOCKSIZE, REPLICATION, 0);
	DFSTestUtil.waitForReplication(dfs, foo, REPLICATION, 10000);

	// restart NN
	cluster.restartNameNode(true);
	InvalidateBlocks invalidateBlocks =
	(InvalidateBlocks) Whitebox.getInternalState(cluster.getNamesystem()
	.getBlockManager(), "invalidateBlocks");
	InvalidateBlocks mockIb = Mockito.spy(invalidateBlocks);
	// Return invalidation delay to delay the block's deletion
	Mockito.doReturn(1L).when(mockIb).getInvalidationDelay();
	Whitebox.setInternalState(cluster.getNamesystem().getBlockManager(),
	"invalidateBlocks", mockIb);
	dfs.delete(foo, true);

	waitForNumPendingDeletionBlocks(REPLICATION);
	Assert.assertEquals(0, cluster.getNamesystem().getBlocksTotal());
	Assert.assertEquals(REPLICATION, cluster.getNamesystem()
	.getPendingDeletionBlocks());
	Assert.assertEquals(REPLICATION,
	dfs.getPendingDeletionBlocksCount());
	Mockito.doReturn(0L).when(mockIb).getInvalidationDelay();

	waitForNumPendingDeletionBlocks(0);
	Assert.assertEquals(0, cluster.getNamesystem().getBlocksTotal());
	Assert.assertEquals(0, cluster.getNamesystem().getPendingDeletionBlocks());
	Assert.assertEquals(0, dfs.getPendingDeletionBlocksCount());
	long nnStarted = cluster.getNamesystem().getNNStartedTimeInMillis();
	long blockDeletionStartTime = cluster.getNamesystem()
	.getBlockDeletionStartTime();
	Assert.assertTrue(String.format(
	"Expect blockDeletionStartTime = %d > nnStarted = %d.",
	blockDeletionStartTime, nnStarted), blockDeletionStartTime > nnStarted);

	// test client protocol compatibility
	Method method = DFSClient.class.
	getDeclaredMethod("getStateByIndex", int.class);
	method.setAccessible(true);
	// get number of pending deletion blocks by its index
	long validState = (Long) method.invoke(dfs.getClient(),
	ClientProtocol.GET_STATS_PENDING_DELETION_BLOCKS_IDX);
	// get an out of index value
	long invalidState = (Long) method.invoke(dfs.getClient(),
	ClientProtocol.STATS_ARRAY_LENGTH);
	Assert.assertEquals(0, validState);
	Assert.assertEquals(-1, invalidState);
	}

	/**
	* Test whether we can delay the deletion of unknown blocks in DataNode's
	* first several block reports.
	*/
	@Test
	public void testPendingDeleteUnknownBlocks() throws Exception {
	final int fileNum = 5; // 5 files
	final Path[] files = new Path[fileNum];
	final DataNodeProperties[] dnprops = new DataNodeProperties[REPLICATION];
	// create a group of files, each file contains 1 block
	for (int i = 0; i < fileNum; i++) {
	files[i] = new Path("/file" + i);
	DFSTestUtil.createFile(dfs, files[i], BLOCKSIZE, REPLICATION, i);
	}
	// wait until all DataNodes have replicas
	waitForReplication();
	for (int i = REPLICATION - 1; i >= 0; i--) {
	dnprops[i] = cluster.stopDataNode(i);
	}
	Thread.sleep(2000);
	// delete 2 files, we still have 3 files remaining so that we can cover
	// every DN storage
	for (int i = 0; i < 2; i++) {
	dfs.delete(files[i], true);
	}

	// restart NameNode
	cluster.restartNameNode(false);
	InvalidateBlocks invalidateBlocks = (InvalidateBlocks) Whitebox
	.getInternalState(cluster.getNamesystem().getBlockManager(),
	"invalidateBlocks");
	InvalidateBlocks mockIb = Mockito.spy(invalidateBlocks);
	Mockito.doReturn(1L).when(mockIb).getInvalidationDelay();
	Whitebox.setInternalState(cluster.getNamesystem().getBlockManager(),
	"invalidateBlocks", mockIb);

	Assert.assertEquals(0L, cluster.getNamesystem().getPendingDeletionBlocks());
	// restart DataNodes
	for (int i = 0; i < REPLICATION; i++) {
	cluster.restartDataNode(dnprops[i]);
	}
	cluster.waitActive();

	for (int i = 0; i < REPLICATION; i++) {
	DataNodeTestUtils.triggerBlockReport(cluster.getDataNodes().get(i));
	}
	Thread.sleep(2000);
	// make sure we have received block reports by checking the total block #
	Assert.assertEquals(3, cluster.getNamesystem().getBlocksTotal());
	Assert.assertEquals(4, cluster.getNamesystem().getPendingDeletionBlocks());

	cluster.restartNameNode(true);
	waitForNumPendingDeletionBlocks(0);
	Assert.assertEquals(3, cluster.getNamesystem().getBlocksTotal());
	Assert.assertEquals(0, cluster.getNamesystem().getPendingDeletionBlocks());
	}

	private long waitForReplication() throws Exception {
	for (int i = 0; i < 10; i++) {
	long ur = cluster.getNamesystem().getUnderReplicatedBlocks();
	if (ur == 0) {
	return 0;
	} else {
	Thread.sleep(1000);
	}
	}
	return cluster.getNamesystem().getUnderReplicatedBlocks();
	}

	private void waitForNumPendingDeletionBlocks(final int numBlocks)
	throws Exception {
	GenericTestUtils.waitFor(new Supplier<Boolean>() {

	@Override
	public Boolean get() {
	try {
	cluster.triggerBlockReports();

	if (cluster.getNamesystem().getPendingDeletionBlocks()
	== numBlocks) {
	return true;
	}
	} catch (Exception e) {
	// Ignore the exception
	}

	return false;
	}
	}, 6000, 60000);
	}
	}