| /** |
| * 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; |
| |
| import static org.apache.hadoop.test.MetricsAsserts.assertCounter; |
| import static org.apache.hadoop.test.MetricsAsserts.getMetrics; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| import static org.mockito.ArgumentMatchers.any; |
| |
| import com.google.common.base.Supplier; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.net.InetSocketAddress; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.concurrent.TimeoutException; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| 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.hdfs.protocol.ClientProtocol; |
| import org.apache.hadoop.hdfs.protocol.DatanodeInfo; |
| import org.apache.hadoop.hdfs.protocol.ExtendedBlock; |
| import org.apache.hadoop.hdfs.protocol.LocatedBlock; |
| import org.apache.hadoop.hdfs.protocol.LocatedBlocks; |
| import org.apache.hadoop.hdfs.protocol.HdfsConstants.DatanodeReportType; |
| import org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolClientSideTranslatorPB; |
| import org.apache.hadoop.hdfs.server.blockmanagement.BlockManager; |
| import org.apache.hadoop.hdfs.server.blockmanagement.BlockManagerTestUtil; |
| import org.apache.hadoop.hdfs.server.datanode.DataNode; |
| import org.apache.hadoop.hdfs.server.datanode.DataStorage; |
| import org.apache.hadoop.hdfs.server.datanode.DataNodeTestUtils; |
| import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi; |
| import org.apache.hadoop.hdfs.server.datanode.FsDatasetTestUtils.MaterializedReplica; |
| import org.apache.hadoop.hdfs.server.datanode.InternalDataNodeTestUtils; |
| import org.apache.hadoop.hdfs.server.datanode.SimulatedFSDataset; |
| import org.apache.hadoop.hdfs.server.namenode.NameNode; |
| import org.apache.hadoop.io.IOUtils; |
| import org.apache.hadoop.metrics2.MetricsRecordBuilder; |
| import org.apache.hadoop.test.GenericTestUtils; |
| import org.apache.hadoop.test.GenericTestUtils.DelayAnswer; |
| import org.apache.hadoop.util.Time; |
| import org.junit.Test; |
| import org.mockito.Mockito; |
| |
| /** |
| * This class tests the replication of a DFS file. |
| */ |
| public class TestReplication { |
| private static final long seed = 0xDEADBEEFL; |
| private static final int blockSize = 8192; |
| private static final int fileSize = 16384; |
| private static final String racks[] = new String[] { |
| "/d1/r1", "/d1/r1", "/d1/r2", "/d1/r2", "/d1/r2", "/d2/r3", "/d2/r3" |
| }; |
| private static final int numDatanodes = racks.length; |
| private static final Logger LOG = LoggerFactory.getLogger( |
| TestReplication.class); |
| |
| /* check if there are at least two nodes are on the same rack */ |
| private void checkFile(FileSystem fileSys, Path name, int repl) |
| throws IOException { |
| Configuration conf = fileSys.getConf(); |
| ClientProtocol namenode = NameNodeProxies.createProxy(conf, fileSys.getUri(), |
| ClientProtocol.class).getProxy(); |
| |
| waitForBlockReplication(name.toString(), namenode, |
| Math.min(numDatanodes, repl), -1); |
| |
| LocatedBlocks locations = namenode.getBlockLocations(name.toString(),0, |
| Long.MAX_VALUE); |
| FileStatus stat = fileSys.getFileStatus(name); |
| BlockLocation[] blockLocations = fileSys.getFileBlockLocations(stat,0L, |
| Long.MAX_VALUE); |
| // verify that rack locations match |
| assertTrue(blockLocations.length == locations.locatedBlockCount()); |
| for (int i = 0; i < blockLocations.length; i++) { |
| LocatedBlock blk = locations.get(i); |
| DatanodeInfo[] datanodes = blk.getLocations(); |
| String[] topologyPaths = blockLocations[i].getTopologyPaths(); |
| assertTrue(topologyPaths.length == datanodes.length); |
| for (int j = 0; j < topologyPaths.length; j++) { |
| boolean found = false; |
| for (int k = 0; k < racks.length; k++) { |
| if (topologyPaths[j].startsWith(racks[k])) { |
| found = true; |
| break; |
| } |
| } |
| assertTrue(found); |
| } |
| } |
| |
| boolean isOnSameRack = true, isNotOnSameRack = true; |
| for (LocatedBlock blk : locations.getLocatedBlocks()) { |
| DatanodeInfo[] datanodes = blk.getLocations(); |
| if (datanodes.length <= 1) break; |
| if (datanodes.length == 2) { |
| isNotOnSameRack = !(datanodes[0].getNetworkLocation().equals( |
| datanodes[1].getNetworkLocation())); |
| break; |
| } |
| isOnSameRack = false; |
| isNotOnSameRack = false; |
| for (int i = 0; i < datanodes.length-1; i++) { |
| LOG.info("datanode "+ i + ": "+ datanodes[i]); |
| boolean onRack = false; |
| for( int j=i+1; j<datanodes.length; j++) { |
| if( datanodes[i].getNetworkLocation().equals( |
| datanodes[j].getNetworkLocation()) ) { |
| onRack = true; |
| } |
| } |
| if (onRack) { |
| isOnSameRack = true; |
| } |
| if (!onRack) { |
| isNotOnSameRack = true; |
| } |
| if (isOnSameRack && isNotOnSameRack) break; |
| } |
| if (!isOnSameRack || !isNotOnSameRack) break; |
| } |
| assertTrue(isOnSameRack); |
| assertTrue(isNotOnSameRack); |
| } |
| |
| private void cleanupFile(FileSystem fileSys, Path name) throws IOException { |
| assertTrue(fileSys.exists(name)); |
| fileSys.delete(name, true); |
| assertTrue(!fileSys.exists(name)); |
| } |
| |
| private static class CorruptFileSimulatedFSDataset |
| extends SimulatedFSDataset { |
| /** |
| * Simulated input and output streams. |
| * |
| */ |
| static private class CorruptFileSimulatedInputStream |
| extends java.io.InputStream { |
| private InputStream inputStream; |
| |
| CorruptFileSimulatedInputStream(InputStream is) { |
| inputStream = is; |
| } |
| |
| @Override |
| public int read() throws IOException { |
| int ret = inputStream.read(); |
| if (ret > 0) { |
| throw new IOException("Input/output error"); |
| } |
| return ret; |
| } |
| |
| @Override |
| public int read(byte[] b) throws IOException { |
| int ret = inputStream.read(b); |
| if (ret > 0) { |
| throw new IOException("Input/output error"); |
| } |
| return ret; |
| } |
| } |
| |
| CorruptFileSimulatedFSDataset(DataNode datanode, DataStorage storage, |
| Configuration conf) { |
| super(storage, conf); |
| } |
| |
| @Override |
| public synchronized InputStream getBlockInputStream(ExtendedBlock b, |
| long seekOffset) throws IOException { |
| InputStream result = super.getBlockInputStream(b); |
| IOUtils.skipFully(result, seekOffset); |
| return new CorruptFileSimulatedInputStream(result); |
| } |
| |
| static class Factory |
| extends FsDatasetSpi.Factory<CorruptFileSimulatedFSDataset> { |
| @Override |
| public CorruptFileSimulatedFSDataset newInstance(DataNode datanode, |
| DataStorage storage, Configuration conf) throws IOException { |
| return new CorruptFileSimulatedFSDataset(datanode, storage, conf); |
| } |
| |
| @Override |
| public boolean isSimulated() { |
| return true; |
| } |
| } |
| } |
| |
| private void testBadBlockReportOnTransfer( |
| boolean corruptBlockByDeletingBlockFile) throws Exception { |
| Configuration conf = new HdfsConfiguration(); |
| FileSystem fs = null; |
| DFSClient dfsClient = null; |
| LocatedBlocks blocks = null; |
| int replicaCount = 0; |
| short replFactor = 1; |
| MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(2).build(); |
| cluster.waitActive(); |
| fs = cluster.getFileSystem(); |
| dfsClient = new DFSClient(new InetSocketAddress("localhost", |
| cluster.getNameNodePort()), conf); |
| |
| // Create file with replication factor of 1 |
| Path file1 = new Path("/tmp/testBadBlockReportOnTransfer/file1"); |
| DFSTestUtil.createFile(fs, file1, 1024, replFactor, 0); |
| DFSTestUtil.waitReplication(fs, file1, replFactor); |
| |
| // Corrupt the block belonging to the created file |
| ExtendedBlock block = DFSTestUtil.getFirstBlock(fs, file1); |
| |
| int blockFilesCorrupted = |
| corruptBlockByDeletingBlockFile? |
| cluster.corruptBlockOnDataNodesByDeletingBlockFile(block) : |
| cluster.corruptBlockOnDataNodes(block); |
| |
| assertEquals("Corrupted too few blocks", replFactor, blockFilesCorrupted); |
| |
| // Increase replication factor, this should invoke transfer request |
| // Receiving datanode fails on checksum and reports it to namenode |
| replFactor = 2; |
| fs.setReplication(file1, replFactor); |
| |
| // Now get block details and check if the block is corrupt |
| blocks = dfsClient.getNamenode(). |
| getBlockLocations(file1.toString(), 0, Long.MAX_VALUE); |
| while (blocks.get(0).isCorrupt() != true) { |
| try { |
| LOG.info("Waiting until block is marked as corrupt..."); |
| Thread.sleep(1000); |
| } catch (InterruptedException ie) { |
| } |
| blocks = dfsClient.getNamenode(). |
| getBlockLocations(file1.toString(), 0, Long.MAX_VALUE); |
| } |
| replicaCount = blocks.get(0).getLocations().length; |
| assertTrue(replicaCount == 1); |
| cluster.shutdown(); |
| } |
| |
| @Test(timeout = 30000) |
| public void testBadBlockReportOnTransferCorruptFile() throws Exception { |
| Configuration conf = new HdfsConfiguration(); |
| conf.set(DFSConfigKeys.DFS_DATANODE_FSDATASET_FACTORY_KEY, |
| CorruptFileSimulatedFSDataset.Factory.class.getName()); |
| // Disable BlockScanner to trigger reportBadBlocks |
| conf.setLong(DFSConfigKeys.DFS_DATANODE_SCAN_PERIOD_HOURS_KEY, -1L); |
| FileSystem fs; |
| int replicaCount = 0; |
| short replFactor = 1; |
| MiniDFSCluster cluster = |
| new MiniDFSCluster.Builder(conf).numDataNodes(2).build(); |
| cluster.waitActive(); |
| try { |
| fs = cluster.getFileSystem(); |
| final DFSClient dfsClient = new DFSClient( |
| new InetSocketAddress("localhost", cluster.getNameNodePort()), conf); |
| |
| // Create file with replication factor of 1 |
| Path file1 = new Path("/tmp/testBadBlockReportOnTransfer/file1"); |
| DFSTestUtil.createFile(fs, file1, 1024, replFactor, 0); |
| DFSTestUtil.waitReplication(fs, file1, replFactor); |
| |
| // Increase replication factor, this should invoke transfer request |
| // Receiving datanode fails on checksum and reports it to namenode |
| replFactor = 2; |
| fs.setReplication(file1, replFactor); |
| |
| // Now get block details and check if the block is corrupt |
| GenericTestUtils.waitFor(() -> { |
| try { |
| return dfsClient.getNamenode() |
| .getBlockLocations(file1.toString(), 0, Long.MAX_VALUE).get(0) |
| .isCorrupt(); |
| } catch (IOException ie) { |
| return false; |
| } |
| }, 1000, 15000); |
| replicaCount = dfsClient.getNamenode() |
| .getBlockLocations(file1.toString(), 0, Long.MAX_VALUE).get(0) |
| .getLocations().length; |
| assertEquals("replication should not success", 1, replicaCount); |
| } finally { |
| cluster.shutdown(); |
| } |
| } |
| |
| /* |
| * Test if Datanode reports bad blocks during replication request |
| */ |
| @Test |
| public void testBadBlockReportOnTransfer() throws Exception { |
| testBadBlockReportOnTransfer(false); |
| } |
| |
| /* |
| * Test if Datanode reports bad blocks during replication request |
| * with missing block file |
| */ |
| @Test |
| public void testBadBlockReportOnTransferMissingBlockFile() throws Exception { |
| testBadBlockReportOnTransfer(true); |
| } |
| |
| /** |
| * Tests replication in DFS. |
| */ |
| public void runReplication(boolean simulated) throws IOException { |
| Configuration conf = new HdfsConfiguration(); |
| conf.setBoolean(DFSConfigKeys.DFS_NAMENODE_REDUNDANCY_CONSIDERLOAD_KEY, |
| false); |
| if (simulated) { |
| SimulatedFSDataset.setFactory(conf); |
| } |
| MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf) |
| .numDataNodes(numDatanodes) |
| .racks(racks).build(); |
| cluster.waitActive(); |
| |
| InetSocketAddress addr = new InetSocketAddress("localhost", |
| cluster.getNameNodePort()); |
| DFSClient client = new DFSClient(addr, conf); |
| |
| DatanodeInfo[] info = client.datanodeReport(DatanodeReportType.LIVE); |
| assertEquals("Number of Datanodes ", numDatanodes, info.length); |
| FileSystem fileSys = cluster.getFileSystem(); |
| try { |
| Path file1 = new Path("/smallblocktest.dat"); |
| //writeFile(fileSys, file1, 3); |
| DFSTestUtil.createFile(fileSys, file1, fileSize, fileSize, blockSize, |
| (short) 3, seed); |
| checkFile(fileSys, file1, 3); |
| cleanupFile(fileSys, file1); |
| DFSTestUtil.createFile(fileSys, file1, fileSize, fileSize, blockSize, |
| (short) 10, seed); |
| checkFile(fileSys, file1, 10); |
| cleanupFile(fileSys, file1); |
| DFSTestUtil.createFile(fileSys, file1, fileSize, fileSize, blockSize, |
| (short) 4, seed); |
| checkFile(fileSys, file1, 4); |
| cleanupFile(fileSys, file1); |
| DFSTestUtil.createFile(fileSys, file1, fileSize, fileSize, blockSize, |
| (short) 1, seed); |
| checkFile(fileSys, file1, 1); |
| cleanupFile(fileSys, file1); |
| DFSTestUtil.createFile(fileSys, file1, fileSize, fileSize, blockSize, |
| (short) 2, seed); |
| checkFile(fileSys, file1, 2); |
| cleanupFile(fileSys, file1); |
| } finally { |
| fileSys.close(); |
| cluster.shutdown(); |
| } |
| } |
| |
| |
| @Test |
| public void testReplicationSimulatedStorag() throws IOException { |
| runReplication(true); |
| } |
| |
| |
| @Test |
| public void testReplication() throws IOException { |
| runReplication(false); |
| } |
| |
| // Waits for all of the blocks to have expected replication |
| private void waitForBlockReplication(String filename, |
| ClientProtocol namenode, |
| int expected, long maxWaitSec) |
| throws IOException { |
| waitForBlockReplication(filename, namenode, expected, maxWaitSec, false, false); |
| } |
| |
| private void waitForBlockReplication(String filename, |
| ClientProtocol namenode, |
| int expected, long maxWaitSec, |
| boolean isUnderConstruction, boolean noOverReplication) |
| throws IOException { |
| long start = Time.monotonicNow(); |
| |
| //wait for all the blocks to be replicated; |
| LOG.info("Checking for block replication for " + filename); |
| while (true) { |
| boolean replOk = true; |
| LocatedBlocks blocks = namenode.getBlockLocations(filename, 0, |
| Long.MAX_VALUE); |
| |
| for (Iterator<LocatedBlock> iter = blocks.getLocatedBlocks().iterator(); |
| iter.hasNext();) { |
| LocatedBlock block = iter.next(); |
| if (isUnderConstruction && !iter.hasNext()) { |
| break; // do not check the last block |
| } |
| int actual = block.getLocations().length; |
| if (noOverReplication) { |
| assertTrue(actual <= expected); |
| } |
| if ( actual < expected ) { |
| LOG.info("Not enough replicas for " + block.getBlock() |
| + " yet. Expecting " + expected + ", got " + actual + "."); |
| replOk = false; |
| break; |
| } |
| } |
| |
| if (replOk) { |
| return; |
| } |
| |
| if (maxWaitSec > 0 && |
| (Time.monotonicNow() - start) > (maxWaitSec * 1000)) { |
| throw new IOException("Timedout while waiting for all blocks to " + |
| " be replicated for " + filename); |
| } |
| |
| try { |
| Thread.sleep(500); |
| } catch (InterruptedException ignored) {} |
| } |
| } |
| |
| /* This test makes sure that NameNode retries all the available blocks |
| * for under replicated blocks. |
| * |
| * It creates a file with one block and replication of 4. It corrupts |
| * two of the blocks and removes one of the replicas. Expected behavior is |
| * that missing replica will be copied from one valid source. |
| */ |
| @Test |
| public void testPendingReplicationRetry() throws IOException { |
| |
| MiniDFSCluster cluster = null; |
| int numDataNodes = 4; |
| String testFile = "/replication-test-file"; |
| Path testPath = new Path(testFile); |
| |
| byte buffer[] = new byte[1024]; |
| for (int i=0; i<buffer.length; i++) { |
| buffer[i] = '1'; |
| } |
| |
| try { |
| Configuration conf = new HdfsConfiguration(); |
| conf.set(DFSConfigKeys.DFS_REPLICATION_KEY, Integer.toString(numDataNodes)); |
| //first time format |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(numDataNodes).build(); |
| cluster.waitActive(); |
| DFSClient dfsClient = new DFSClient(new InetSocketAddress("localhost", |
| cluster.getNameNodePort()), |
| conf); |
| |
| OutputStream out = cluster.getFileSystem().create(testPath); |
| out.write(buffer); |
| out.close(); |
| |
| waitForBlockReplication(testFile, dfsClient.getNamenode(), numDataNodes, -1); |
| |
| // get first block of the file. |
| ExtendedBlock block = dfsClient.getNamenode().getBlockLocations(testFile, |
| 0, Long.MAX_VALUE).get(0).getBlock(); |
| |
| List<MaterializedReplica> replicas = new ArrayList<>(); |
| for (int dnIndex=0; dnIndex<3; dnIndex++) { |
| replicas.add(cluster.getMaterializedReplica(dnIndex, block)); |
| } |
| assertEquals(3, replicas.size()); |
| |
| cluster.shutdown(); |
| |
| int fileCount = 0; |
| // Choose 3 copies of block file - delete 1 and corrupt the remaining 2 |
| for (MaterializedReplica replica : replicas) { |
| if (fileCount == 0) { |
| LOG.info("Deleting block " + replica); |
| replica.deleteData(); |
| } else { |
| // corrupt it. |
| LOG.info("Corrupting file " + replica); |
| replica.corruptData(); |
| } |
| fileCount++; |
| } |
| |
| /* Start the MiniDFSCluster with more datanodes since once a writeBlock |
| * to a datanode node fails, same block can not be written to it |
| * immediately. In our case some replication attempts will fail. |
| */ |
| |
| LOG.info("Restarting minicluster after deleting a replica and corrupting 2 crcs"); |
| conf = new HdfsConfiguration(); |
| conf.set(DFSConfigKeys.DFS_REPLICATION_KEY, Integer.toString(numDataNodes)); |
| conf.set(DFSConfigKeys.DFS_NAMENODE_RECONSTRUCTION_PENDING_TIMEOUT_SEC_KEY, Integer.toString(2)); |
| conf.set("dfs.datanode.block.write.timeout.sec", Integer.toString(5)); |
| conf.set(DFSConfigKeys.DFS_NAMENODE_SAFEMODE_THRESHOLD_PCT_KEY, "0.75f"); // only 3 copies exist |
| |
| cluster = new MiniDFSCluster.Builder(conf) |
| .numDataNodes(numDataNodes * 2) |
| .format(false) |
| .build(); |
| cluster.waitActive(); |
| |
| dfsClient = new DFSClient(new InetSocketAddress("localhost", |
| cluster.getNameNodePort()), |
| conf); |
| |
| waitForBlockReplication(testFile, dfsClient.getNamenode(), numDataNodes, -1); |
| |
| } finally { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| |
| /** |
| * Test if replication can detect mismatched length on-disk blocks |
| * @throws Exception |
| */ |
| @Test |
| public void testReplicateLenMismatchedBlock() throws Exception { |
| MiniDFSCluster cluster = new MiniDFSCluster.Builder(new HdfsConfiguration()).numDataNodes(2).build(); |
| try { |
| cluster.waitActive(); |
| // test truncated block |
| changeBlockLen(cluster, -1); |
| // test extended block |
| changeBlockLen(cluster, 1); |
| } finally { |
| cluster.shutdown(); |
| } |
| } |
| |
| private void changeBlockLen(MiniDFSCluster cluster, int lenDelta) |
| throws IOException, InterruptedException, TimeoutException { |
| final Path fileName = new Path("/file1"); |
| final short REPLICATION_FACTOR = (short)1; |
| final FileSystem fs = cluster.getFileSystem(); |
| final int fileLen = fs.getConf().getInt(DFSConfigKeys.DFS_BYTES_PER_CHECKSUM_KEY, 512); |
| DFSTestUtil.createFile(fs, fileName, fileLen, REPLICATION_FACTOR, 0); |
| DFSTestUtil.waitReplication(fs, fileName, REPLICATION_FACTOR); |
| |
| ExtendedBlock block = DFSTestUtil.getFirstBlock(fs, fileName); |
| |
| // Change the length of a replica |
| for (int i=0; i<cluster.getDataNodes().size(); i++) { |
| if (DFSTestUtil.changeReplicaLength(cluster, block, i, lenDelta)) { |
| break; |
| } |
| } |
| |
| // increase the file's replication factor |
| fs.setReplication(fileName, (short)(REPLICATION_FACTOR+1)); |
| |
| // block replication triggers corrupt block detection |
| DFSClient dfsClient = new DFSClient(new InetSocketAddress("localhost", |
| cluster.getNameNodePort()), fs.getConf()); |
| LocatedBlocks blocks = dfsClient.getNamenode().getBlockLocations( |
| fileName.toString(), 0, fileLen); |
| if (lenDelta < 0) { // replica truncated |
| while (!blocks.get(0).isCorrupt() || |
| REPLICATION_FACTOR != blocks.get(0).getLocations().length) { |
| Thread.sleep(100); |
| blocks = dfsClient.getNamenode().getBlockLocations( |
| fileName.toString(), 0, fileLen); |
| } |
| } else { // no corruption detected; block replicated |
| while (REPLICATION_FACTOR+1 != blocks.get(0).getLocations().length) { |
| Thread.sleep(100); |
| blocks = dfsClient.getNamenode().getBlockLocations( |
| fileName.toString(), 0, fileLen); |
| } |
| } |
| fs.delete(fileName, true); |
| } |
| |
| /** |
| * Test that blocks should get replicated if we have corrupted blocks and |
| * having good replicas at least equal or greater to minreplication |
| * |
| * Simulate rbw blocks by creating dummy copies, then a DN restart to detect |
| * those corrupted blocks asap. |
| */ |
| @Test(timeout=30000) |
| public void testReplicationWhenBlockCorruption() throws Exception { |
| MiniDFSCluster cluster = null; |
| try { |
| Configuration conf = new HdfsConfiguration(); |
| conf.setLong( |
| DFSConfigKeys.DFS_NAMENODE_RECONSTRUCTION_PENDING_TIMEOUT_SEC_KEY, 1); |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(3) |
| .storagesPerDatanode(1).build(); |
| FileSystem fs = cluster.getFileSystem(); |
| Path filePath = new Path("/test"); |
| FSDataOutputStream create = fs.create(filePath); |
| fs.setReplication(filePath, (short) 1); |
| create.write(new byte[1024]); |
| create.close(); |
| |
| ExtendedBlock block = DFSTestUtil.getFirstBlock(fs, filePath); |
| int numReplicaCreated = 0; |
| for (final DataNode dn : cluster.getDataNodes()) { |
| if (!dn.getFSDataset().contains(block)) { |
| cluster.getFsDatasetTestUtils(dn).injectCorruptReplica(block); |
| numReplicaCreated++; |
| } |
| } |
| assertEquals(2, numReplicaCreated); |
| |
| fs.setReplication(filePath, (short) 3); |
| cluster.restartDataNodes(); // Lets detect all DNs about dummy copied |
| // blocks |
| cluster.waitActive(); |
| cluster.triggerBlockReports(); |
| DFSTestUtil.waitReplication(fs, filePath, (short) 3); |
| } finally { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| |
| |
| /** |
| * This test makes sure that, when a file is closed before all |
| * of the datanodes in the pipeline have reported their replicas, |
| * the NameNode doesn't consider the block under-replicated too |
| * aggressively. It is a regression test for HDFS-1172. |
| */ |
| @Test(timeout=60000) |
| public void testNoExtraReplicationWhenBlockReceivedIsLate() |
| throws Exception { |
| LOG.info("Test block replication when blockReceived is late" ); |
| final short numDataNodes = 3; |
| final short replication = 3; |
| final Configuration conf = new Configuration(); |
| conf.setInt(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, 1024); |
| final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf) |
| .numDataNodes(numDataNodes).build(); |
| final String testFile = "/replication-test-file"; |
| final Path testPath = new Path(testFile); |
| final BlockManager bm = |
| cluster.getNameNode().getNamesystem().getBlockManager(); |
| |
| try { |
| cluster.waitActive(); |
| |
| // Artificially delay IBR from 1 DataNode. |
| // this ensures that the client's completeFile() RPC will get to the |
| // NN before some of the replicas are reported. |
| NameNode nn = cluster.getNameNode(); |
| DataNode dn = cluster.getDataNodes().get(0); |
| DatanodeProtocolClientSideTranslatorPB spy = |
| InternalDataNodeTestUtils.spyOnBposToNN(dn, nn); |
| DelayAnswer delayer = new GenericTestUtils.DelayAnswer(LOG); |
| Mockito.doAnswer(delayer).when(spy).blockReceivedAndDeleted( |
| any(), |
| Mockito.anyString(), |
| any()); |
| |
| FileSystem fs = cluster.getFileSystem(); |
| // Create and close a small file with two blocks |
| DFSTestUtil.createFile(fs, testPath, 1500, replication, 0); |
| |
| // schedule replication via BlockManager#computeReplicationWork |
| BlockManagerTestUtil.computeAllPendingWork(bm); |
| |
| // Initially, should have some pending replication since the close() |
| // is earlier than at lease one of the reportReceivedDeletedBlocks calls |
| assertTrue(pendingReplicationCount(bm) > 0); |
| |
| // release pending IBR. |
| delayer.waitForCall(); |
| delayer.proceed(); |
| delayer.waitForResult(); |
| |
| // make sure DataNodes do replication work if exists |
| for (DataNode d : cluster.getDataNodes()) { |
| DataNodeTestUtils.triggerHeartbeat(d); |
| } |
| |
| // Wait until there is nothing pending |
| try { |
| GenericTestUtils.waitFor(new Supplier<Boolean>() { |
| @Override |
| public Boolean get() { |
| return pendingReplicationCount(bm) == 0; |
| } |
| }, 100, 3000); |
| } catch (TimeoutException e) { |
| fail("timed out while waiting for no pending replication."); |
| } |
| |
| // Check that none of the datanodes have serviced a replication request. |
| // i.e. that the NameNode didn't schedule any spurious replication. |
| assertNoReplicationWasPerformed(cluster); |
| } finally { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| |
| /** |
| * This test makes sure that, if a file is under construction, blocks |
| * in the middle of that file are properly re-replicated if they |
| * become corrupt. |
| */ |
| @Test(timeout=60000) |
| public void testReplicationWhileUnderConstruction() |
| throws Exception { |
| LOG.info("Test block replication in under construction" ); |
| MiniDFSCluster cluster = null; |
| final short numDataNodes = 6; |
| final short replication = 3; |
| String testFile = "/replication-test-file"; |
| Path testPath = new Path(testFile); |
| FSDataOutputStream stm = null; |
| try { |
| Configuration conf = new Configuration(); |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(numDataNodes).build(); |
| cluster.waitActive(); |
| |
| FileSystem fs = cluster.getFileSystem(); |
| |
| stm = AppendTestUtil.createFile(fs, testPath, replication); |
| |
| // Write a full block |
| byte[] buffer = AppendTestUtil.initBuffer(AppendTestUtil.BLOCK_SIZE); |
| stm.write(buffer); // block 1 |
| stm.write(buffer); // block 2 |
| stm.write(buffer, 0, 1); // start block 3 |
| stm.hflush(); // make sure blocks are persisted, etc |
| |
| // Everything should be fully replicated |
| waitForBlockReplication(testFile, cluster.getNameNodeRpc(), replication, 30000, true, true); |
| |
| // Check that none of the datanodes have serviced a replication request. |
| // i.e. that the NameNode didn't schedule any spurious replication. |
| assertNoReplicationWasPerformed(cluster); |
| |
| // Mark one the blocks corrupt |
| List<LocatedBlock> blocks; |
| FSDataInputStream in = fs.open(testPath); |
| try { |
| blocks = DFSTestUtil.getAllBlocks(in); |
| } finally { |
| in.close(); |
| } |
| LocatedBlock lb = blocks.get(0); |
| LocatedBlock lbOneReplica = new LocatedBlock(lb.getBlock(), |
| new DatanodeInfo[] { lb.getLocations()[0] }); |
| cluster.getNameNodeRpc().reportBadBlocks( |
| new LocatedBlock[] { lbOneReplica }); |
| |
| // Everything should be fully replicated |
| waitForBlockReplication(testFile, cluster.getNameNodeRpc(), replication, 30000, true, true); |
| } finally { |
| if (stm != null) { |
| IOUtils.closeStream(stm); |
| } |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| |
| private long pendingReplicationCount(BlockManager bm) { |
| BlockManagerTestUtil.updateState(bm); |
| return bm.getPendingReconstructionBlocksCount(); |
| } |
| |
| private void assertNoReplicationWasPerformed(MiniDFSCluster cluster) { |
| for (DataNode dn : cluster.getDataNodes()) { |
| MetricsRecordBuilder rb = getMetrics(dn.getMetrics().name()); |
| assertCounter("BlocksReplicated", 0L, rb); |
| } |
| } |
| } |