HDFS-8930. Block report lease may leak if the 2nd full block report comes when NN is still in safemode (Colin P. McCabe via Jing Zhao)

(cherry picked from commit b5ce87f84d)

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -857,6 +857,9 @@ Release 2.8.0 - UNRELEASED
     HDFS-8942. Update hyperlink to rack awareness page in HDFS Architecture
     documentation. (Masatake Iwasaki via aajisaka)
 
+    HDFS-8930. Block report lease may leak if the 2nd full block report comes
+    when NN is still in safemode (Colin P. McCabe via Jing Zhao)
+
 Release 2.7.2 - UNRELEASED
 
   INCOMPATIBLE CHANGES

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

@@ -1838,6 +1838,7 @@ public boolean processReport(final DatanodeID nodeID,
         blockLog.info("BLOCK* processReport: "
             + "discarded non-initial block report from {}"
             + " because namenode still in startup phase", nodeID);
+        blockReportLeaseManager.removeLease(node);
         return !node.hasStaleStorages();
       }
       if (context != null) {

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

@@ -29,7 +29,6 @@
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.hdfs.protocol.DatanodeID;
-import org.apache.hadoop.hdfs.server.datanode.DataNode;
 import org.apache.hadoop.hdfs.server.protocol.BlockReportContext;
 import org.apache.hadoop.test.GenericTestUtils;
 import org.apache.log4j.Level;
@@ -40,7 +39,6 @@
 
 import java.io.IOException;
 import java.util.HashSet;
-import java.util.List;
 import java.util.concurrent.Semaphore;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicReference;