| /** |
| * 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.datanode; |
| |
| import static org.junit.Assert.assertArrayEquals; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertNull; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assume.assumeTrue; |
| |
| import java.io.File; |
| import java.lang.management.ManagementFactory; |
| import java.util.ArrayList; |
| import java.util.concurrent.TimeUnit; |
| |
| import javax.management.MBeanServer; |
| import javax.management.ObjectName; |
| |
| import com.google.common.base.Supplier; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.conf.ReconfigurationException; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.DFSTestUtil; |
| import org.apache.hadoop.hdfs.HdfsConfiguration; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor; |
| import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManager; |
| import org.apache.hadoop.hdfs.server.common.Storage; |
| import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi; |
| import org.apache.hadoop.hdfs.server.namenode.FSNamesystem; |
| import org.apache.hadoop.hdfs.server.protocol.VolumeFailureSummary; |
| import org.apache.hadoop.io.IOUtils; |
| 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; |
| |
| /** |
| * Test reporting of DN volume failure counts and metrics. |
| */ |
| public class TestDataNodeVolumeFailureReporting { |
| |
| private static final Log LOG = |
| LogFactory.getLog(TestDataNodeVolumeFailureReporting.class); |
| { |
| GenericTestUtils.setLogLevel(TestDataNodeVolumeFailureReporting.LOG, |
| Level.ALL); |
| } |
| |
| private FileSystem fs; |
| private MiniDFSCluster cluster; |
| private Configuration conf; |
| private String dataDir; |
| private long volumeCapacity; |
| |
| // Sleep at least 3 seconds (a 1s heartbeat plus padding) to allow |
| // for heartbeats to propagate from the datanodes to the namenode. |
| final int WAIT_FOR_HEARTBEATS = 3000; |
| |
| // Wait at least (2 * re-check + 10 * heartbeat) seconds for |
| // a datanode to be considered dead by the namenode. |
| final int WAIT_FOR_DEATH = 15000; |
| |
| @Before |
| public void setUp() throws Exception { |
| // These tests use DataNodeTestUtils#injectDataDirFailure() to simulate |
| // volume failures which is currently not supported on Windows. |
| assumeTrue(!Path.WINDOWS); |
| // Allow a single volume failure (there are two volumes) |
| initCluster(1, 2, 1); |
| } |
| |
| @After |
| public void tearDown() throws Exception { |
| IOUtils.cleanup(LOG, fs); |
| if (cluster != null) { |
| cluster.shutdown(); |
| cluster = null; |
| } |
| } |
| |
| /** |
| * Test that individual volume failures do not cause DNs to fail, that |
| * all volumes failed on a single datanode do cause it to fail, and |
| * that the capacities and liveliness is adjusted correctly in the NN. |
| */ |
| @Test |
| public void testSuccessiveVolumeFailures() throws Exception { |
| // Bring up two more datanodes |
| cluster.startDataNodes(conf, 2, true, null, null); |
| cluster.waitActive(); |
| |
| /* |
| * Calculate the total capacity of all the datanodes. Sleep for |
| * three seconds to be sure the datanodes have had a chance to |
| * heartbeat their capacities. |
| */ |
| Thread.sleep(WAIT_FOR_HEARTBEATS); |
| final DatanodeManager dm = cluster.getNamesystem().getBlockManager( |
| ).getDatanodeManager(); |
| |
| final long origCapacity = DFSTestUtil.getLiveDatanodeCapacity(dm); |
| long dnCapacity = DFSTestUtil.getDatanodeCapacity(dm, 0); |
| |
| File dn1Vol1 = new File(dataDir, "data"+(2*0+1)); |
| File dn2Vol1 = new File(dataDir, "data"+(2*1+1)); |
| File dn3Vol1 = new File(dataDir, "data"+(2*2+1)); |
| File dn3Vol2 = new File(dataDir, "data"+(2*2+2)); |
| |
| /* |
| * Make the 1st volume directories on the first two datanodes |
| * non-accessible. We don't make all three 1st volume directories |
| * readonly since that would cause the entire pipeline to |
| * fail. The client does not retry failed nodes even though |
| * perhaps they could succeed because just a single volume failed. |
| */ |
| DataNodeTestUtils.injectDataDirFailure(dn1Vol1, dn2Vol1); |
| |
| /* |
| * Create file1 and wait for 3 replicas (ie all DNs can still |
| * store a block). Then assert that all DNs are up, despite the |
| * volume failures. |
| */ |
| Path file1 = new Path("/test1"); |
| DFSTestUtil.createFile(fs, file1, 1024, (short)3, 1L); |
| DFSTestUtil.waitReplication(fs, file1, (short)3); |
| ArrayList<DataNode> dns = cluster.getDataNodes(); |
| assertTrue("DN1 should be up", dns.get(0).isDatanodeUp()); |
| assertTrue("DN2 should be up", dns.get(1).isDatanodeUp()); |
| assertTrue("DN3 should be up", dns.get(2).isDatanodeUp()); |
| |
| /* |
| * The metrics should confirm the volume failures. |
| */ |
| checkFailuresAtDataNode(dns.get(0), 1, true, dn1Vol1.getAbsolutePath()); |
| checkFailuresAtDataNode(dns.get(1), 1, true, dn2Vol1.getAbsolutePath()); |
| checkFailuresAtDataNode(dns.get(2), 0, true); |
| |
| // Ensure we wait a sufficient amount of time |
| assert (WAIT_FOR_HEARTBEATS * 10) > WAIT_FOR_DEATH; |
| |
| // Eventually the NN should report two volume failures |
| DFSTestUtil.waitForDatanodeStatus(dm, 3, 0, 2, |
| origCapacity - (1*dnCapacity), WAIT_FOR_HEARTBEATS); |
| checkAggregateFailuresAtNameNode(true, 2); |
| checkFailuresAtNameNode(dm, dns.get(0), true, dn1Vol1.getAbsolutePath()); |
| checkFailuresAtNameNode(dm, dns.get(1), true, dn2Vol1.getAbsolutePath()); |
| checkFailuresAtNameNode(dm, dns.get(2), true); |
| |
| /* |
| * Now fail a volume on the third datanode. We should be able to get |
| * three replicas since we've already identified the other failures. |
| */ |
| DataNodeTestUtils.injectDataDirFailure(dn3Vol1); |
| Path file2 = new Path("/test2"); |
| DFSTestUtil.createFile(fs, file2, 1024, (short)3, 1L); |
| DFSTestUtil.waitReplication(fs, file2, (short)3); |
| assertTrue("DN3 should still be up", dns.get(2).isDatanodeUp()); |
| checkFailuresAtDataNode(dns.get(2), 1, true, dn3Vol1.getAbsolutePath()); |
| |
| DataNodeTestUtils.triggerHeartbeat(dns.get(2)); |
| checkFailuresAtNameNode(dm, dns.get(2), true, dn3Vol1.getAbsolutePath()); |
| |
| /* |
| * Once the datanodes have a chance to heartbeat their new capacity the |
| * total capacity should be down by three volumes (assuming the host |
| * did not grow or shrink the data volume while the test was running). |
| */ |
| dnCapacity = DFSTestUtil.getDatanodeCapacity(dm, 0); |
| DFSTestUtil.waitForDatanodeStatus(dm, 3, 0, 3, |
| origCapacity - (3*dnCapacity), WAIT_FOR_HEARTBEATS); |
| checkAggregateFailuresAtNameNode(true, 3); |
| checkFailuresAtNameNode(dm, dns.get(0), true, dn1Vol1.getAbsolutePath()); |
| checkFailuresAtNameNode(dm, dns.get(1), true, dn2Vol1.getAbsolutePath()); |
| checkFailuresAtNameNode(dm, dns.get(2), true, dn3Vol1.getAbsolutePath()); |
| |
| /* |
| * Now fail the 2nd volume on the 3rd datanode. All its volumes |
| * are now failed and so it should report two volume failures |
| * and that it's no longer up. Only wait for two replicas since |
| * we'll never get a third. |
| */ |
| DataNodeTestUtils.injectDataDirFailure(dn3Vol2); |
| Path file3 = new Path("/test3"); |
| DFSTestUtil.createFile(fs, file3, 1024, (short)3, 1L); |
| DFSTestUtil.waitReplication(fs, file3, (short)2); |
| |
| // The DN should consider itself dead |
| DFSTestUtil.waitForDatanodeDeath(dns.get(2)); |
| |
| // And report two failed volumes |
| checkFailuresAtDataNode(dns.get(2), 2, true, dn3Vol1.getAbsolutePath(), |
| dn3Vol2.getAbsolutePath()); |
| |
| // The NN considers the DN dead |
| DFSTestUtil.waitForDatanodeStatus(dm, 2, 1, 2, |
| origCapacity - (4*dnCapacity), WAIT_FOR_HEARTBEATS); |
| checkAggregateFailuresAtNameNode(true, 2); |
| checkFailuresAtNameNode(dm, dns.get(0), true, dn1Vol1.getAbsolutePath()); |
| checkFailuresAtNameNode(dm, dns.get(1), true, dn2Vol1.getAbsolutePath()); |
| |
| /* |
| * The datanode never tries to restore the failed volume, even if |
| * it's subsequently repaired, but it should see this volume on |
| * restart, so file creation should be able to succeed after |
| * restoring the data directories and restarting the datanodes. |
| */ |
| DataNodeTestUtils.restoreDataDirFromFailure( |
| dn1Vol1, dn2Vol1, dn3Vol1, dn3Vol2); |
| cluster.restartDataNodes(); |
| cluster.waitActive(); |
| Path file4 = new Path("/test4"); |
| DFSTestUtil.createFile(fs, file4, 1024, (short)3, 1L); |
| DFSTestUtil.waitReplication(fs, file4, (short)3); |
| |
| /* |
| * Eventually the capacity should be restored to its original value, |
| * and that the volume failure count should be reported as zero by |
| * both the metrics and the NN. |
| */ |
| DFSTestUtil.waitForDatanodeStatus(dm, 3, 0, 0, origCapacity, |
| WAIT_FOR_HEARTBEATS); |
| checkAggregateFailuresAtNameNode(true, 0); |
| dns = cluster.getDataNodes(); |
| checkFailuresAtNameNode(dm, dns.get(0), true); |
| checkFailuresAtNameNode(dm, dns.get(1), true); |
| checkFailuresAtNameNode(dm, dns.get(2), true); |
| } |
| |
| /** |
| * Test that the NN re-learns of volume failures after restart. |
| */ |
| @Test |
| public void testVolFailureStatsPreservedOnNNRestart() throws Exception { |
| // Bring up two more datanodes that can tolerate 1 failure |
| cluster.startDataNodes(conf, 2, true, null, null); |
| cluster.waitActive(); |
| |
| final DatanodeManager dm = cluster.getNamesystem().getBlockManager( |
| ).getDatanodeManager(); |
| long origCapacity = DFSTestUtil.getLiveDatanodeCapacity(dm); |
| long dnCapacity = DFSTestUtil.getDatanodeCapacity(dm, 0); |
| |
| // Fail the first volume on both datanodes (we have to keep the |
| // third healthy so one node in the pipeline will not fail). |
| File dn1Vol1 = new File(dataDir, "data"+(2*0+1)); |
| File dn2Vol1 = new File(dataDir, "data"+(2*1+1)); |
| DataNodeTestUtils.injectDataDirFailure(dn1Vol1, dn2Vol1); |
| |
| Path file1 = new Path("/test1"); |
| DFSTestUtil.createFile(fs, file1, 1024, (short)2, 1L); |
| DFSTestUtil.waitReplication(fs, file1, (short)2); |
| ArrayList<DataNode> dns = cluster.getDataNodes(); |
| |
| // The NN reports two volumes failures |
| DFSTestUtil.waitForDatanodeStatus(dm, 3, 0, 2, |
| origCapacity - (1*dnCapacity), WAIT_FOR_HEARTBEATS); |
| checkAggregateFailuresAtNameNode(true, 2); |
| checkFailuresAtNameNode(dm, dns.get(0), true, dn1Vol1.getAbsolutePath()); |
| checkFailuresAtNameNode(dm, dns.get(1), true, dn2Vol1.getAbsolutePath()); |
| |
| // After restarting the NN it still see the two failures |
| cluster.restartNameNode(0); |
| cluster.waitActive(); |
| DFSTestUtil.waitForDatanodeStatus(dm, 3, 0, 2, |
| origCapacity - (1*dnCapacity), WAIT_FOR_HEARTBEATS); |
| checkAggregateFailuresAtNameNode(true, 2); |
| checkFailuresAtNameNode(dm, dns.get(0), true, dn1Vol1.getAbsolutePath()); |
| checkFailuresAtNameNode(dm, dns.get(1), true, dn2Vol1.getAbsolutePath()); |
| } |
| |
| @Test |
| public void testMultipleVolFailuresOnNode() throws Exception { |
| // Reinitialize the cluster, configured with 4 storage locations per DataNode |
| // and tolerating up to 2 failures. |
| tearDown(); |
| initCluster(3, 4, 2); |
| |
| // Calculate the total capacity of all the datanodes. Sleep for three seconds |
| // to be sure the datanodes have had a chance to heartbeat their capacities. |
| Thread.sleep(WAIT_FOR_HEARTBEATS); |
| DatanodeManager dm = cluster.getNamesystem().getBlockManager() |
| .getDatanodeManager(); |
| |
| long origCapacity = DFSTestUtil.getLiveDatanodeCapacity(dm); |
| long dnCapacity = DFSTestUtil.getDatanodeCapacity(dm, 0); |
| |
| File dn1Vol1 = new File(dataDir, "data"+(4*0+1)); |
| File dn1Vol2 = new File(dataDir, "data"+(4*0+2)); |
| File dn2Vol1 = new File(dataDir, "data"+(4*1+1)); |
| File dn2Vol2 = new File(dataDir, "data"+(4*1+2)); |
| |
| // Make the first two volume directories on the first two datanodes |
| // non-accessible. |
| DataNodeTestUtils.injectDataDirFailure(dn1Vol1, dn1Vol2, dn2Vol1, dn2Vol2); |
| |
| // Create file1 and wait for 3 replicas (ie all DNs can still store a block). |
| // Then assert that all DNs are up, despite the volume failures. |
| Path file1 = new Path("/test1"); |
| DFSTestUtil.createFile(fs, file1, 1024, (short)3, 1L); |
| DFSTestUtil.waitReplication(fs, file1, (short)3); |
| |
| // Create additional file to trigger failure based volume check on dn1Vol2 |
| // and dn2Vol2. |
| Path file2 = new Path("/test2"); |
| DFSTestUtil.createFile(fs, file2, 1024, (short)3, 1L); |
| DFSTestUtil.waitReplication(fs, file2, (short)3); |
| |
| ArrayList<DataNode> dns = cluster.getDataNodes(); |
| assertTrue("DN1 should be up", dns.get(0).isDatanodeUp()); |
| assertTrue("DN2 should be up", dns.get(1).isDatanodeUp()); |
| assertTrue("DN3 should be up", dns.get(2).isDatanodeUp()); |
| |
| checkFailuresAtDataNode(dns.get(0), 1, true, dn1Vol1.getAbsolutePath(), |
| dn1Vol2.getAbsolutePath()); |
| checkFailuresAtDataNode(dns.get(1), 1, true, dn2Vol1.getAbsolutePath(), |
| dn2Vol2.getAbsolutePath()); |
| checkFailuresAtDataNode(dns.get(2), 0, true); |
| |
| // Ensure we wait a sufficient amount of time |
| assert (WAIT_FOR_HEARTBEATS * 10) > WAIT_FOR_DEATH; |
| |
| // Eventually the NN should report four volume failures |
| DFSTestUtil.waitForDatanodeStatus(dm, 3, 0, 4, |
| origCapacity - (1*dnCapacity), WAIT_FOR_HEARTBEATS); |
| checkAggregateFailuresAtNameNode(true, 4); |
| checkFailuresAtNameNode(dm, dns.get(0), true, dn1Vol1.getAbsolutePath(), |
| dn1Vol2.getAbsolutePath()); |
| checkFailuresAtNameNode(dm, dns.get(1), true, dn2Vol1.getAbsolutePath(), |
| dn2Vol2.getAbsolutePath()); |
| checkFailuresAtNameNode(dm, dns.get(2), true); |
| } |
| |
| @Test |
| public void testDataNodeReconfigureWithVolumeFailures() throws Exception { |
| // Bring up two more datanodes |
| cluster.startDataNodes(conf, 2, true, null, null); |
| cluster.waitActive(); |
| |
| final DatanodeManager dm = cluster.getNamesystem().getBlockManager( |
| ).getDatanodeManager(); |
| long origCapacity = DFSTestUtil.getLiveDatanodeCapacity(dm); |
| long dnCapacity = DFSTestUtil.getDatanodeCapacity(dm, 0); |
| |
| // Fail the first volume on both datanodes (we have to keep the |
| // third healthy so one node in the pipeline will not fail). |
| File dn1Vol1 = new File(dataDir, "data"+(2*0+1)); |
| File dn1Vol2 = new File(dataDir, "data"+(2*0+2)); |
| File dn2Vol1 = new File(dataDir, "data"+(2*1+1)); |
| File dn2Vol2 = new File(dataDir, "data"+(2*1+2)); |
| DataNodeTestUtils.injectDataDirFailure(dn1Vol1); |
| DataNodeTestUtils.injectDataDirFailure(dn2Vol1); |
| |
| Path file1 = new Path("/test1"); |
| DFSTestUtil.createFile(fs, file1, 1024, (short)2, 1L); |
| DFSTestUtil.waitReplication(fs, file1, (short)2); |
| |
| ArrayList<DataNode> dns = cluster.getDataNodes(); |
| assertTrue("DN1 should be up", dns.get(0).isDatanodeUp()); |
| assertTrue("DN2 should be up", dns.get(1).isDatanodeUp()); |
| assertTrue("DN3 should be up", dns.get(2).isDatanodeUp()); |
| |
| checkFailuresAtDataNode(dns.get(0), 1, true, dn1Vol1.getAbsolutePath()); |
| checkFailuresAtDataNode(dns.get(1), 1, true, dn2Vol1.getAbsolutePath()); |
| checkFailuresAtDataNode(dns.get(2), 0, true); |
| |
| // Ensure we wait a sufficient amount of time |
| assert (WAIT_FOR_HEARTBEATS * 10) > WAIT_FOR_DEATH; |
| |
| // The NN reports two volume failures |
| DFSTestUtil.waitForDatanodeStatus(dm, 3, 0, 2, |
| origCapacity - (1*dnCapacity), WAIT_FOR_HEARTBEATS); |
| checkAggregateFailuresAtNameNode(true, 2); |
| checkFailuresAtNameNode(dm, dns.get(0), true, dn1Vol1.getAbsolutePath()); |
| checkFailuresAtNameNode(dm, dns.get(1), true, dn2Vol1.getAbsolutePath()); |
| |
| // Reconfigure again to try to add back the failed volumes. |
| DataNodeTestUtils.reconfigureDataNode(dns.get(0), dn1Vol1, dn1Vol2); |
| DataNodeTestUtils.reconfigureDataNode(dns.get(1), dn2Vol1, dn2Vol2); |
| |
| DataNodeTestUtils.triggerHeartbeat(dns.get(0)); |
| DataNodeTestUtils.triggerHeartbeat(dns.get(1)); |
| |
| checkFailuresAtDataNode(dns.get(0), 1, true, dn1Vol1.getAbsolutePath()); |
| checkFailuresAtDataNode(dns.get(1), 1, true, dn2Vol1.getAbsolutePath()); |
| |
| // Ensure we wait a sufficient amount of time. |
| assert (WAIT_FOR_HEARTBEATS * 10) > WAIT_FOR_DEATH; |
| |
| // The NN reports two volume failures again. |
| DFSTestUtil.waitForDatanodeStatus(dm, 3, 0, 2, |
| origCapacity - (1*dnCapacity), WAIT_FOR_HEARTBEATS); |
| checkAggregateFailuresAtNameNode(true, 2); |
| checkFailuresAtNameNode(dm, dns.get(0), true, dn1Vol1.getAbsolutePath()); |
| checkFailuresAtNameNode(dm, dns.get(1), true, dn2Vol1.getAbsolutePath()); |
| |
| // Reconfigure a third time with the failed volumes. Afterwards, we expect |
| // the same volume failures to be reported. (No double-counting.) |
| DataNodeTestUtils.reconfigureDataNode(dns.get(0), dn1Vol1, dn1Vol2); |
| DataNodeTestUtils.reconfigureDataNode(dns.get(1), dn2Vol1, dn2Vol2); |
| |
| DataNodeTestUtils.triggerHeartbeat(dns.get(0)); |
| DataNodeTestUtils.triggerHeartbeat(dns.get(1)); |
| |
| checkFailuresAtDataNode(dns.get(0), 1, true, dn1Vol1.getAbsolutePath()); |
| checkFailuresAtDataNode(dns.get(1), 1, true, dn2Vol1.getAbsolutePath()); |
| |
| // Ensure we wait a sufficient amount of time. |
| assert (WAIT_FOR_HEARTBEATS * 10) > WAIT_FOR_DEATH; |
| |
| // The NN reports two volume failures again. |
| DFSTestUtil.waitForDatanodeStatus(dm, 3, 0, 2, |
| origCapacity - (1*dnCapacity), WAIT_FOR_HEARTBEATS); |
| checkAggregateFailuresAtNameNode(true, 2); |
| checkFailuresAtNameNode(dm, dns.get(0), true, dn1Vol1.getAbsolutePath()); |
| checkFailuresAtNameNode(dm, dns.get(1), true, dn2Vol1.getAbsolutePath()); |
| |
| // Replace failed volume with healthy volume and run reconfigure DataNode. |
| // The failed volume information should be cleared. |
| DataNodeTestUtils.restoreDataDirFromFailure(dn1Vol1, dn2Vol1); |
| DataNodeTestUtils.reconfigureDataNode(dns.get(0), dn1Vol1, dn1Vol2); |
| DataNodeTestUtils.reconfigureDataNode(dns.get(1), dn2Vol1, dn2Vol2); |
| |
| DataNodeTestUtils.triggerHeartbeat(dns.get(0)); |
| DataNodeTestUtils.triggerHeartbeat(dns.get(1)); |
| |
| checkFailuresAtDataNode(dns.get(0), 1, true); |
| checkFailuresAtDataNode(dns.get(1), 1, true); |
| |
| DFSTestUtil.waitForDatanodeStatus(dm, 3, 0, 0, |
| origCapacity, WAIT_FOR_HEARTBEATS); |
| checkAggregateFailuresAtNameNode(true, 0); |
| checkFailuresAtNameNode(dm, dns.get(0), true); |
| checkFailuresAtNameNode(dm, dns.get(1), true); |
| } |
| |
| @Test |
| public void testAutoFormatEmptyDirectory() throws Exception { |
| // remove the version file |
| File dn1Vol1 = cluster.getStorageDir(0, 0); |
| File current = new File(dn1Vol1, "current"); |
| File currentVersion = new File(current, "VERSION"); |
| currentVersion.delete(); |
| // restart the data node |
| assertTrue(cluster.restartDataNodes(true)); |
| // the DN should tolerate one volume failure. |
| cluster.waitActive(); |
| ArrayList<DataNode> dns = cluster.getDataNodes(); |
| DataNode dn = dns.get(0); |
| assertFalse("DataNode should not reformat if VERSION is missing", |
| currentVersion.exists()); |
| |
| // Make sure DN's JMX sees the failed volume |
| final String[] expectedFailedVolumes = {dn1Vol1.getAbsolutePath()}; |
| DataNodeTestUtils.triggerHeartbeat(dn); |
| FsDatasetSpi<?> fsd = dn.getFSDataset(); |
| assertEquals(expectedFailedVolumes.length, fsd.getNumFailedVolumes()); |
| assertArrayEquals(expectedFailedVolumes, fsd.getFailedStorageLocations()); |
| // there shouldn't be any more volume failures due to I/O failure |
| checkFailuresAtDataNode(dn, 0, false, expectedFailedVolumes); |
| |
| // The NN reports one volume failures |
| final DatanodeManager dm = cluster.getNamesystem().getBlockManager(). |
| getDatanodeManager(); |
| long dnCapacity = DFSTestUtil.getDatanodeCapacity(dm, 0); |
| DFSTestUtil.waitForDatanodeStatus(dm, 1, 0, 1, |
| (1*dnCapacity), WAIT_FOR_HEARTBEATS); |
| checkAggregateFailuresAtNameNode(false, 1); |
| checkFailuresAtNameNode(dm, dns.get(0), false, dn1Vol1.getAbsolutePath()); |
| } |
| |
| @Test |
| public void testAutoFormatEmptyBlockPoolDirectory() throws Exception { |
| // remove the version file |
| DataNode dn = cluster.getDataNodes().get(0); |
| String bpid = cluster.getNamesystem().getBlockPoolId(); |
| BlockPoolSliceStorage bps = dn.getStorage().getBPStorage(bpid); |
| Storage.StorageDirectory dir = bps.getStorageDir(0); |
| File current = dir.getCurrentDir(); |
| |
| File currentVersion = new File(current, "VERSION"); |
| currentVersion.delete(); |
| // restart the data node |
| assertTrue(cluster.restartDataNodes(true)); |
| // the DN should tolerate one volume failure. |
| cluster.waitActive(); |
| assertFalse("DataNode should not reformat if VERSION is missing", |
| currentVersion.exists()); |
| } |
| |
| /** |
| * Verify DataNode NumFailedVolumes and FailedStorageLocations |
| * after hot swap out of failed volume. |
| */ |
| @Test (timeout = 120000) |
| public void testHotSwapOutFailedVolumeAndReporting() |
| throws Exception { |
| LOG.info("Starting testHotSwapOutFailedVolumeAndReporting!"); |
| final File dn0Vol1 = new File(dataDir, "data" + (2 * 0 + 1)); |
| final File dn0Vol2 = new File(dataDir, "data" + (2 * 0 + 2)); |
| final DataNode dn0 = cluster.getDataNodes().get(0); |
| final String oldDataDirs = dn0.getConf().get( |
| DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY); |
| |
| final MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); |
| final ObjectName mxbeanName = new ObjectName( |
| "Hadoop:service=DataNode,name=FSDatasetState-" + dn0.getDatanodeUuid()); |
| int numFailedVolumes = (int) mbs.getAttribute(mxbeanName, |
| "NumFailedVolumes"); |
| Assert.assertEquals(dn0.getFSDataset().getNumFailedVolumes(), |
| numFailedVolumes); |
| checkFailuresAtDataNode(dn0, 0, false, new String[] {}); |
| |
| // Fail dn0Vol1 first. |
| // Verify NumFailedVolumes and FailedStorageLocations are empty. |
| DataNodeTestUtils.injectDataDirFailure(dn0Vol1); |
| DataNodeTestUtils.waitForDiskError(dn0, |
| DataNodeTestUtils.getVolume(dn0, dn0Vol1)); |
| numFailedVolumes = (int) mbs.getAttribute(mxbeanName, "NumFailedVolumes"); |
| Assert.assertEquals(1, numFailedVolumes); |
| Assert.assertEquals(dn0.getFSDataset().getNumFailedVolumes(), |
| numFailedVolumes); |
| checkFailuresAtDataNode(dn0, 1, true, |
| new String[] {dn0Vol1.getAbsolutePath()}); |
| |
| // Reconfigure disks without fixing the failed disk. |
| // Verify NumFailedVolumes and FailedStorageLocations haven't changed. |
| try { |
| dn0.reconfigurePropertyImpl(DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY, |
| oldDataDirs); |
| } catch (ReconfigurationException e) { |
| Assert.assertTrue("Reconfigure exception doesn't have expected path!", |
| e.getCause().getMessage().contains(dn0Vol1.getAbsolutePath())); |
| } |
| GenericTestUtils.waitFor(new Supplier<Boolean>() { |
| @Override |
| public Boolean get() { |
| try { |
| return ((int) mbs.getAttribute(mxbeanName, |
| "NumFailedVolumes") == 1); |
| } catch (Exception e) { |
| return false; |
| } |
| } |
| }, 1000, 30000); |
| Assert.assertEquals(dn0.getFSDataset().getNumFailedVolumes(), |
| numFailedVolumes); |
| checkFailuresAtDataNode(dn0, 1, true, |
| new String[] {dn0Vol1.getAbsolutePath()}); |
| |
| // Hot swap out the failed volume. |
| // Verify NumFailedVolumes and FailedStorageLocations are reset. |
| String dataDirs = dn0Vol2.getPath(); |
| dn0.reconfigurePropertyImpl(DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY, |
| dataDirs); |
| numFailedVolumes = (int) mbs.getAttribute(mxbeanName, "NumFailedVolumes"); |
| Assert.assertEquals(0, numFailedVolumes); |
| Assert.assertEquals(dn0.getFSDataset().getNumFailedVolumes(), |
| numFailedVolumes); |
| checkFailuresAtDataNode(dn0, 0, true, new String[] {}); |
| |
| // Fix failure volume dn0Vol1 and remount it back. |
| // Verify NumFailedVolumes and FailedStorageLocations are empty. |
| DataNodeTestUtils.restoreDataDirFromFailure(dn0Vol1); |
| dn0.reconfigurePropertyImpl(DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY, |
| oldDataDirs); |
| numFailedVolumes = (int) mbs.getAttribute(mxbeanName, "NumFailedVolumes"); |
| Assert.assertEquals(0, numFailedVolumes); |
| Assert.assertEquals(dn0.getFSDataset().getNumFailedVolumes(), |
| numFailedVolumes); |
| checkFailuresAtDataNode(dn0, 0, true, new String[] {}); |
| |
| // Fail dn0Vol2. |
| // Verify NumFailedVolumes and FailedStorageLocations are updated. |
| DataNodeTestUtils.injectDataDirFailure(dn0Vol2); |
| DataNodeTestUtils.waitForDiskError(dn0, |
| DataNodeTestUtils.getVolume(dn0, dn0Vol2)); |
| numFailedVolumes = (int) mbs.getAttribute(mxbeanName, "NumFailedVolumes"); |
| Assert.assertEquals(1, numFailedVolumes); |
| Assert.assertEquals(dn0.getFSDataset().getNumFailedVolumes(), |
| numFailedVolumes); |
| checkFailuresAtDataNode(dn0, 1, true, |
| new String[] {dn0Vol2.getAbsolutePath()}); |
| |
| // Verify DataNode tolerating one disk failure. |
| assertTrue(dn0.shouldRun()); |
| } |
| |
| /** |
| * Checks the NameNode for correct values of aggregate counters tracking failed |
| * volumes across all DataNodes. |
| * |
| * @param expectCapacityKnown if true, then expect that the capacities of the |
| * volumes were known before the failures, and therefore the lost capacity |
| * can be reported |
| * @param expectedVolumeFailuresTotal expected number of failed volumes |
| */ |
| private void checkAggregateFailuresAtNameNode(boolean expectCapacityKnown, |
| int expectedVolumeFailuresTotal) { |
| FSNamesystem ns = cluster.getNamesystem(); |
| assertEquals(expectedVolumeFailuresTotal, ns.getVolumeFailuresTotal()); |
| long expectedCapacityLost = getExpectedCapacityLost(expectCapacityKnown, |
| expectedVolumeFailuresTotal); |
| assertEquals(expectedCapacityLost, ns.getEstimatedCapacityLostTotal()); |
| } |
| |
| /** |
| * Checks a DataNode for correct reporting of failed volumes. |
| * |
| * @param dn DataNode to check |
| * @param expectedVolumeFailuresCounter metric counter value for |
| * VolumeFailures. The current implementation actually counts the number |
| * of failed disk checker cycles, which may be different from the length of |
| * expectedFailedVolumes if multiple disks fail in the same disk checker |
| * cycle |
| * @param expectCapacityKnown if true, then expect that the capacities of the |
| * volumes were known before the failures, and therefore the lost capacity |
| * can be reported |
| * @param expectedFailedVolumes expected locations of failed volumes |
| * @throws Exception if there is any failure |
| */ |
| private void checkFailuresAtDataNode(DataNode dn, |
| long expectedVolumeFailuresCounter, boolean expectCapacityKnown, |
| String... expectedFailedVolumes) throws Exception { |
| FsDatasetSpi<?> fsd = dn.getFSDataset(); |
| assertEquals(expectedFailedVolumes.length, fsd.getNumFailedVolumes()); |
| assertArrayEquals(expectedFailedVolumes, fsd.getFailedStorageLocations()); |
| if (expectedFailedVolumes.length > 0) { |
| assertTrue(fsd.getLastVolumeFailureDate() > 0); |
| long expectedCapacityLost = getExpectedCapacityLost(expectCapacityKnown, |
| expectedFailedVolumes.length); |
| assertEquals(expectedCapacityLost, fsd.getEstimatedCapacityLostTotal()); |
| } else { |
| assertEquals(0, fsd.getLastVolumeFailureDate()); |
| assertEquals(0, fsd.getEstimatedCapacityLostTotal()); |
| } |
| } |
| |
| /** |
| * Checks NameNode tracking of a particular DataNode for correct reporting of |
| * failed volumes. |
| * |
| * @param dm DatanodeManager to check |
| * @param dn DataNode to check |
| * @param expectCapacityKnown if true, then expect that the capacities of the |
| * volumes were known before the failures, and therefore the lost capacity |
| * can be reported |
| * @param expectedFailedVolumes expected locations of failed volumes |
| * @throws Exception if there is any failure |
| */ |
| private void checkFailuresAtNameNode(DatanodeManager dm, DataNode dn, |
| boolean expectCapacityKnown, String... expectedFailedVolumes) |
| throws Exception { |
| DatanodeDescriptor dd = cluster.getNamesystem().getBlockManager() |
| .getDatanodeManager().getDatanode(dn.getDatanodeId()); |
| assertEquals(expectedFailedVolumes.length, dd.getVolumeFailures()); |
| VolumeFailureSummary volumeFailureSummary = dd.getVolumeFailureSummary(); |
| if (expectedFailedVolumes.length > 0) { |
| assertArrayEquals(expectedFailedVolumes, volumeFailureSummary |
| .getFailedStorageLocations()); |
| assertTrue(volumeFailureSummary.getLastVolumeFailureDate() > 0); |
| long expectedCapacityLost = getExpectedCapacityLost(expectCapacityKnown, |
| expectedFailedVolumes.length); |
| assertEquals(expectedCapacityLost, |
| volumeFailureSummary.getEstimatedCapacityLostTotal()); |
| } else { |
| assertNull(volumeFailureSummary); |
| } |
| } |
| |
| /** |
| * Returns expected capacity lost for use in assertions. The return value is |
| * dependent on whether or not it is expected that the volume capacities were |
| * known prior to the failures. |
| * |
| * @param expectCapacityKnown if true, then expect that the capacities of the |
| * volumes were known before the failures, and therefore the lost capacity |
| * can be reported |
| * @param expectedVolumeFailuresTotal expected number of failed volumes |
| * @return estimated capacity lost in bytes |
| */ |
| private long getExpectedCapacityLost(boolean expectCapacityKnown, |
| int expectedVolumeFailuresTotal) { |
| return expectCapacityKnown ? expectedVolumeFailuresTotal * volumeCapacity : |
| 0; |
| } |
| |
| /** |
| * Initializes the cluster. |
| * |
| * @param numDataNodes number of datanodes |
| * @param storagesPerDatanode number of storage locations on each datanode |
| * @param failedVolumesTolerated number of acceptable volume failures |
| * @throws Exception if there is any failure |
| */ |
| private void initCluster(int numDataNodes, int storagesPerDatanode, |
| int failedVolumesTolerated) throws Exception { |
| conf = new HdfsConfiguration(); |
| conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, 512L); |
| /* |
| * Lower the DN heartbeat, DF rate, and recheck interval to one second |
| * so state about failures and datanode death propagates faster. |
| */ |
| conf.setInt(DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY, 1); |
| conf.setInt(DFSConfigKeys.DFS_DF_INTERVAL_KEY, 1000); |
| conf.setInt(DFSConfigKeys.DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY, 1000); |
| conf.setInt(DFSConfigKeys.DFS_DATANODE_FAILED_VOLUMES_TOLERATED_KEY, |
| failedVolumesTolerated); |
| conf.setTimeDuration(DFSConfigKeys.DFS_DATANODE_DISK_CHECK_MIN_GAP_KEY, |
| 0, TimeUnit.MILLISECONDS); |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(numDataNodes) |
| .storagesPerDatanode(storagesPerDatanode).build(); |
| cluster.waitActive(); |
| fs = cluster.getFileSystem(); |
| dataDir = cluster.getDataDirectory(); |
| long dnCapacity = DFSTestUtil.getDatanodeCapacity( |
| cluster.getNamesystem().getBlockManager().getDatanodeManager(), 0); |
| volumeCapacity = dnCapacity / cluster.getStoragesPerDatanode(); |
| } |
| } |
