HDFS-12914. Addendum patch. Block report leases cause missing blocks until next report. Contributed by Santosh Marella, He Xiaoqiao.

Signed-off-by: Wei-Chiu Chuang <[email protected]>
Co-authored-by: He Xiaoqiao <[email protected]>

Author: 2 people

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

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+/**
+ * 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 org.apache.hadoop.hdfs.HdfsConfiguration;
+import org.apache.hadoop.hdfs.MiniDFSCluster;
+import org.apache.hadoop.hdfs.protocol.BlockListAsLongs;
+import org.apache.hadoop.hdfs.server.datanode.DataNode;
+import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
+import org.apache.hadoop.hdfs.server.protocol.BlockReportContext;
+import org.apache.hadoop.hdfs.server.protocol.DatanodeCommand;
+import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
+import org.apache.hadoop.hdfs.server.protocol.DatanodeStorage;
+import org.apache.hadoop.hdfs.server.protocol.FinalizeCommand;
+import org.apache.hadoop.hdfs.server.protocol.HeartbeatResponse;
+import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols;
+import org.apache.hadoop.hdfs.server.protocol.StorageBlockReport;
+import org.apache.hadoop.hdfs.server.protocol.StorageReport;
+import org.apache.hadoop.test.GenericTestUtils.DelayAnswer;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.spy;
+
+/**
+ * Tests that BlockReportLease in BlockManager.
+ */
+public class TestBlockReportLease {
+
+  /**
+   * Test check lease about one BlockReport with many StorageBlockReport.
+   * Before HDFS-12914, when batch storage report to NameNode, it will check
+   * less for one storage by one, So it could part storage report can
+   * be process normally, however, the rest storage report can not be process
+   * since check lease failed.
+   * After HDFS-12914, NameNode check lease once for every blockreport request,
+   * So this issue will not exist anymore.
+   */
+  @Test
+  public void testCheckBlockReportLease() throws Exception {
+    HdfsConfiguration conf = new HdfsConfiguration();
+    Random rand = new Random();
+
+    try (MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
+        .numDataNodes(1).build()) {
+      cluster.waitActive();
+
+      FSNamesystem fsn = cluster.getNamesystem();
+      BlockManager blockManager = fsn.getBlockManager();
+      BlockManager spyBlockManager = spy(blockManager);
+      fsn.setBlockManagerForTesting(spyBlockManager);
+      String poolId = cluster.getNamesystem().getBlockPoolId();
+
+      NamenodeProtocols rpcServer = cluster.getNameNodeRpc();
+
+      // Test based on one DataNode report to Namenode
+      DataNode dn = cluster.getDataNodes().get(0);
+      DatanodeDescriptor datanodeDescriptor = spyBlockManager
+          .getDatanodeManager().getDatanode(dn.getDatanodeId());
+
+      DatanodeRegistration dnRegistration = dn.getDNRegistrationForBP(poolId);
+      StorageReport[] storages = dn.getFSDataset().getStorageReports(poolId);
+
+      // Send heartbeat and request full block report lease
+      HeartbeatResponse hbResponse = rpcServer.sendHeartbeat(
+          dnRegistration, storages, 0, 0, 0, 0, 0, null, true, null, null);
+
+      DelayAnswer delayer = new DelayAnswer(BlockManager.LOG);
+      doAnswer(delayer).when(spyBlockManager).processReport(
+          any(DatanodeStorageInfo.class),
+          any(BlockListAsLongs.class),
+          any(BlockReportContext.class));
+
+      ExecutorService pool = Executors.newFixedThreadPool(1);
+
+      // Trigger sendBlockReport
+      BlockReportContext brContext = new BlockReportContext(1, 0,
+          rand.nextLong(), hbResponse.getFullBlockReportLeaseId(), true);
+      Future<DatanodeCommand> sendBRfuturea = pool.submit(() -> {
+        // Build every storage with 100 blocks for sending report
+        DatanodeStorage[] datanodeStorages
+            = new DatanodeStorage[storages.length];
+        for (int i = 0; i < storages.length; i++) {
+          datanodeStorages[i] = storages[i].getStorage();
+        }
+        StorageBlockReport[] reports = createReports(datanodeStorages, 100);
+
+        // Send blockReport
+        return rpcServer.blockReport(dnRegistration, poolId, reports,
+            brContext);
+      });
+
+      // Wait until BlockManager calls processReport
+      delayer.waitForCall();
+
+      // Remove full block report lease about dn
+      spyBlockManager.getBlockReportLeaseManager()
+          .removeLease(datanodeDescriptor);
+
+      // Allow blockreport to proceed
+      delayer.proceed();
+
+      // Get result, it will not null if process successfully
+      DatanodeCommand datanodeCommand = sendBRfuturea.get();
+      assertTrue(datanodeCommand instanceof FinalizeCommand);
+      assertEquals(poolId, ((FinalizeCommand)datanodeCommand)
+          .getBlockPoolId());
+    }
+  }
+
+  private StorageBlockReport[] createReports(DatanodeStorage[] dnStorages,
+      int numBlocks) {
+    int longsPerBlock = 3;
+    int blockListSize = 2 + numBlocks * longsPerBlock;
+    int numStorages = dnStorages.length;
+    StorageBlockReport[] storageBlockReports
+        = new StorageBlockReport[numStorages];
+    for (int i = 0; i < numStorages; i++) {
+      List<Long> longs = new ArrayList<Long>(blockListSize);
+      longs.add(Long.valueOf(numBlocks));
+      longs.add(0L);
+      for (int j = 0; j < blockListSize; ++j) {
+        longs.add(Long.valueOf(j));
+      }
+      BlockListAsLongs blockList = BlockListAsLongs.decodeLongs(longs);
+      storageBlockReports[i] = new StorageBlockReport(dnStorages[i], blockList);
+    }
+    return storageBlockReports;
+  }
+}