| /** |
| * 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.namenode; |
| |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.mockito.Mockito.doAnswer; |
| import static org.mockito.Mockito.spy; |
| |
| import java.lang.reflect.Field; |
| import java.util.EnumSet; |
| import java.util.HashMap; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.CreateFlag; |
| import org.apache.hadoop.fs.permission.FsPermission; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.hdfs.protocol.LocatedBlock; |
| import org.apache.hadoop.hdfs.protocol.LocatedBlocks; |
| import org.apache.hadoop.hdfs.server.blockmanagement.BlockManager; |
| import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor; |
| import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols; |
| import org.apache.hadoop.io.EnumSetWritable; |
| import org.apache.hadoop.net.Node; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.mockito.Mockito; |
| import org.mockito.invocation.InvocationOnMock; |
| import org.mockito.stubbing.Answer; |
| |
| /** |
| * Race between two threads simultaneously calling |
| * FSNamesystem.getAdditionalBlock(). |
| */ |
| public class TestAddBlockRetry { |
| public static final Log LOG = LogFactory.getLog(TestAddBlockRetry.class); |
| |
| private static final short REPLICATION = 3; |
| |
| private Configuration conf; |
| private MiniDFSCluster cluster; |
| |
| private int count = 0; |
| private LocatedBlock lb1; |
| private LocatedBlock lb2; |
| |
| @Before |
| public void setUp() throws Exception { |
| conf = new Configuration(); |
| cluster = new MiniDFSCluster.Builder(conf) |
| .numDataNodes(REPLICATION) |
| .build(); |
| cluster.waitActive(); |
| } |
| |
| @After |
| public void tearDown() throws Exception { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| |
| /** |
| * Retry addBlock() while another thread is in chooseTarget(). |
| * See HDFS-4452. |
| */ |
| @Test |
| public void testRetryAddBlockWhileInChooseTarget() throws Exception { |
| final String src = "/testRetryAddBlockWhileInChooseTarget"; |
| |
| FSNamesystem ns = cluster.getNamesystem(); |
| BlockManager spyBM = spy(ns.getBlockManager()); |
| final NamenodeProtocols nn = cluster.getNameNodeRpc(); |
| |
| // substitute mocked BlockManager into FSNamesystem |
| Class<? extends FSNamesystem> nsClass = ns.getClass(); |
| Field bmField = nsClass.getDeclaredField("blockManager"); |
| bmField.setAccessible(true); |
| bmField.set(ns, spyBM); |
| |
| doAnswer(new Answer<DatanodeDescriptor[]>() { |
| @Override |
| public DatanodeDescriptor[] answer(InvocationOnMock invocation) |
| throws Throwable { |
| LOG.info("chooseTarget for " + src); |
| DatanodeDescriptor[] ret = |
| (DatanodeDescriptor[]) invocation.callRealMethod(); |
| count++; |
| if(count == 1) { // run second addBlock() |
| LOG.info("Starting second addBlock for " + src); |
| nn.addBlock(src, "clientName", null, null); |
| LocatedBlocks lbs = nn.getBlockLocations(src, 0, Long.MAX_VALUE); |
| assertEquals("Must be one block", 1, lbs.getLocatedBlocks().size()); |
| lb2 = lbs.get(0); |
| assertEquals("Wrong replication", |
| REPLICATION, lb2.getLocations().length); |
| } |
| return ret; |
| } |
| }).when(spyBM).chooseTarget(Mockito.anyString(), Mockito.anyInt(), |
| Mockito.<DatanodeDescriptor>any(), Mockito.<HashMap<Node, Node>>any(), |
| Mockito.anyLong()); |
| |
| // create file |
| nn.create(src, FsPermission.getFileDefault(), |
| "clientName", |
| new EnumSetWritable<CreateFlag>(EnumSet.of(CreateFlag.CREATE)), |
| true, (short)3, 1024); |
| |
| // start first addBlock() |
| LOG.info("Starting first addBlock for " + src); |
| nn.addBlock(src, "clientName", null, null); |
| |
| // check locations |
| LocatedBlocks lbs = nn.getBlockLocations(src, 0, Long.MAX_VALUE); |
| assertEquals("Must be one block", 1, lbs.getLocatedBlocks().size()); |
| lb1 = lbs.get(0); |
| assertEquals("Wrong replication", REPLICATION, lb1.getLocations().length); |
| assertEquals("Blocks are not equal", lb1.getBlock(), lb2.getBlock()); |
| } |
| } |