HDFS-17093. Fix block report lease issue to avoid missing some storages report. (apache#5855). Contributed by Yanlei Yu.

Reviewed-by: Shuyan Zhang <zqingchai@gmail.com>
Reviewed-by: Xing Lin <linxingnku@gmail.com>
Signed-off-by: He Xiaoqiao <hexiaoqiao@apache.org>

Author: yuyanlei-8130

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java

@@ -2909,7 +2909,7 @@ public boolean processReport(final DatanodeID nodeID,
             + "discarded non-initial block report from {}"
             + " because namenode still in startup phase",
             strBlockReportId, fullBrLeaseId, nodeID);
-        blockReportLeaseManager.removeLease(node);
+        removeDNLeaseIfNeeded(node);
         return !node.hasStaleStorages();
       }
 
@@ -2957,6 +2957,23 @@ public boolean processReport(final DatanodeID nodeID,
     return !node.hasStaleStorages();
   }
 
+  /**
+   * Remove the DN lease only when we have received block reports,
+   * for all storages for a particular DN.
+   */
+  void removeDNLeaseIfNeeded(DatanodeDescriptor node) {
+    boolean needRemoveLease = true;
+    for (DatanodeStorageInfo sInfo : node.getStorageInfos()) {
+      if (sInfo.getBlockReportCount() == 0) {
+        needRemoveLease = false;
+        break;
+      }
+    }
+    if (needRemoveLease) {
+      blockReportLeaseManager.removeLease(node);
+    }
+  }
+
   public void removeBRLeaseIfNeeded(final DatanodeID nodeID,
       final BlockReportContext context) throws IOException {
     namesystem.writeLock();

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

@@ -23,6 +23,8 @@
 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.namenode.NameNode;
+import org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter;
 import org.apache.hadoop.hdfs.server.protocol.BlockReportContext;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeCommand;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
@@ -269,4 +271,83 @@ private StorageBlockReport[] createReports(DatanodeStorage[] dnStorages,
     }
     return storageBlockReports;
   }
+
+  @Test(timeout = 360000)
+  public void testFirstIncompleteBlockReport() 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();
+
+      NameNode nameNode = cluster.getNameNode();
+      // Pretend to be in safemode.
+      NameNodeAdapter.enterSafeMode(nameNode, false);
+
+      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,
+          SlowPeerReports.EMPTY_REPORT, SlowDiskReports.EMPTY_REPORT);
+
+      DelayAnswer delayer = new DelayAnswer(BlockManager.LOG);
+      doAnswer(delayer).when(spyBlockManager).processReport(
+          any(DatanodeStorageInfo.class),
+          any(BlockListAsLongs.class));
+
+      // Trigger sendBlockReport.
+      BlockReportContext brContext = new BlockReportContext(1, 0,
+          rand.nextLong(), hbResponse.getFullBlockReportLeaseId());
+      // 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);
+
+        // The first multiple send once, simulating the failure of the first report,
+        // only send successfully once.
+        if(i == 0){
+          rpcServer.blockReport(dnRegistration, poolId, reports, brContext);
+        }
+
+        // Send blockReport.
+        DatanodeCommand datanodeCommand = rpcServer.blockReport(dnRegistration, poolId, reports,
+            brContext);
+
+        // Wait until BlockManager calls processReport.
+        delayer.waitForCall();
+
+        // Allow blockreport to proceed.
+        delayer.proceed();
+
+        // Get result, it will not null if process successfully.
+        assertTrue(datanodeCommand instanceof FinalizeCommand);
+        assertEquals(poolId, ((FinalizeCommand)datanodeCommand)
+            .getBlockPoolId());
+        if(i == 0){
+          assertEquals(2, datanodeDescriptor.getStorageInfos()[i].getBlockReportCount());
+        }else{
+          assertEquals(1, datanodeDescriptor.getStorageInfos()[i].getBlockReportCount());
+        }
+      }
+    }
+  }
 }