| /** |
| * 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.ha; |
| |
| import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_HA_TAILEDITS_INPROGRESS_KEY; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.CommonConfigurationKeys; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.permission.FsPermission; |
| import org.apache.hadoop.hdfs.DFSTestUtil; |
| import org.apache.hadoop.hdfs.DistributedFileSystem; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.hdfs.protocol.ClientProtocol; |
| import org.apache.hadoop.hdfs.protocol.LocatedBlock; |
| import org.apache.hadoop.hdfs.qjournal.MiniQJMHACluster; |
| import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo; |
| import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManager; |
| import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeStorageInfo; |
| import org.apache.hadoop.hdfs.server.datanode.DataNode; |
| import org.apache.hadoop.hdfs.server.namenode.FSNamesystem; |
| import org.apache.hadoop.hdfs.server.namenode.INodeFile; |
| import org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter; |
| import org.apache.hadoop.hdfs.server.protocol.ReceivedDeletedBlockInfo; |
| import org.apache.hadoop.hdfs.server.protocol.StorageReceivedDeletedBlocks; |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| |
| |
| /** |
| * Tests the race condition that IBR and add block may result |
| * in inconsistent block genstamp. |
| */ |
| public class TestAddBlockTailing { |
| private static final int BLOCK_SIZE = 8192; |
| private static final String TEST_DIR = "/TestAddBlockTailing"; |
| |
| private static MiniQJMHACluster qjmhaCluster; |
| private static MiniDFSCluster dfsCluster; |
| private static DistributedFileSystem dfs; |
| private static FSNamesystem fsn0; |
| private static FSNamesystem fsn1; |
| private static DataNode dn0; |
| |
| @BeforeClass |
| public static void startUpCluster() throws Exception { |
| Configuration conf = new Configuration(); |
| conf.setBoolean(DFS_HA_TAILEDITS_INPROGRESS_KEY, true); |
| MiniQJMHACluster.Builder qjmBuilder = new MiniQJMHACluster.Builder(conf) |
| .setNumNameNodes(2); |
| qjmBuilder.getDfsBuilder().numDataNodes(1); |
| qjmhaCluster = qjmBuilder.build(); |
| dfsCluster = qjmhaCluster.getDfsCluster(); |
| dfsCluster.waitActive(); |
| dfsCluster.transitionToActive(0); |
| dfs = dfsCluster.getFileSystem(0); |
| fsn0 = dfsCluster.getNameNode(0).getNamesystem(); |
| fsn1 = dfsCluster.getNameNode(1).getNamesystem(); |
| dfs.mkdirs(new Path(TEST_DIR), new FsPermission("755")); |
| dn0 = dfsCluster.getDataNodes().get(0); |
| } |
| |
| @AfterClass |
| public static void shutDownCluster() throws IOException { |
| if (qjmhaCluster != null) { |
| qjmhaCluster.shutdown(); |
| } |
| } |
| |
| @Test |
| public void testStandbyAddBlockIBRRace() throws Exception { |
| String testFile = TEST_DIR +"/testStandbyAddBlockIBRRace"; |
| |
| // initial global generation stamp check |
| assertEquals("Global Generation stamps on NNs should be the same", |
| NameNodeAdapter.getGenerationStamp(fsn0), |
| NameNodeAdapter.getGenerationStamp(fsn1)); |
| |
| // create a file, add a block on NN0 |
| // do not journal addBlock yet |
| dfs.create(new Path(testFile), true, dfs.getConf() |
| .getInt(CommonConfigurationKeys.IO_FILE_BUFFER_SIZE_KEY, 4096), |
| (short) 1, BLOCK_SIZE); |
| DatanodeManager dnManager = fsn0.getBlockManager().getDatanodeManager(); |
| DatanodeStorageInfo[] targets = |
| dnManager.getDatanode(dn0.getDatanodeId()).getStorageInfos(); |
| targets = new DatanodeStorageInfo[] {targets[0]}; |
| BlockInfo newBlock = NameNodeAdapter.addBlockNoJournal( |
| fsn0, testFile, targets); |
| |
| // NN1 tails increment generation stamp transaction |
| fsn0.getEditLog().logSync(); |
| fsn1.getEditLogTailer().doTailEdits(); |
| |
| assertEquals("Global Generation stamps on NN0 and " |
| + "impending on NN1 should be equal", |
| NameNodeAdapter.getGenerationStamp(fsn0), |
| NameNodeAdapter.getImpendingGenerationStamp(fsn1)); |
| |
| // NN1 processes IBR with the replica |
| StorageReceivedDeletedBlocks[] report = DFSTestUtil |
| .makeReportForReceivedBlock(newBlock, |
| ReceivedDeletedBlockInfo.BlockStatus.RECEIVED_BLOCK, |
| dn0.getFSDataset().getStorage(targets[0].getStorageID())); |
| fsn1.processIncrementalBlockReport(dn0.getDatanodeId(), report[0]); |
| |
| // NN0 persists the block, i.e adds update block transaction |
| INodeFile file = (INodeFile)fsn0.getFSDirectory().getINode(testFile); |
| NameNodeAdapter.persistBlocks(fsn0, testFile, file); |
| |
| // NN1 tails update block transaction |
| fsn0.getEditLog().logSync(); |
| fsn1.getEditLogTailer().doTailEdits(); |
| |
| assertEquals("Global Generation stamps on NN0 and " |
| + "impending on NN1 should be equal", |
| NameNodeAdapter.getGenerationStamp(fsn0), |
| NameNodeAdapter.getImpendingGenerationStamp(fsn1)); |
| |
| // The new block on NN1 should have the replica |
| BlockInfo newBlock1 = NameNodeAdapter.getStoredBlock(fsn1, newBlock); |
| assertTrue("New block on NN1 should contain the replica", |
| newBlock1.numNodes() > 0); |
| assertEquals("Generation stamps of the block on NNs should be the same", |
| newBlock.getGenerationStamp(), newBlock1.getGenerationStamp()); |
| assertEquals("Global Generation stamps on NNs should be the same", |
| NameNodeAdapter.getGenerationStamp(fsn0), |
| NameNodeAdapter.getGenerationStamp(fsn1)); |
| |
| // Check that the generation stamp restores on Standby after failover |
| ClientProtocol rpc0 = dfsCluster.getNameNode(0).getRpcServer(); |
| ClientProtocol rpc1 = dfsCluster.getNameNode(1).getRpcServer(); |
| LocatedBlock lb = rpc0.getBlockLocations(testFile, 0, 0).get(0); |
| rpc0.updateBlockForPipeline(lb.getBlock(), dfs.getClient().getClientName()); |
| long gs0 = NameNodeAdapter.getGenerationStamp(fsn0); |
| dfsCluster.transitionToStandby(0); |
| dfsCluster.transitionToActive(1); |
| assertEquals("Global Generation stamps on new active should be " |
| + "the same as on the old one", gs0, |
| NameNodeAdapter.getGenerationStamp(fsn1)); |
| |
| rpc1.delete(testFile, false); |
| } |
| } |