HDFS-15873. Add namenode address in logs for block report (#2743)

(cherry picked from commit 6a922f98967ced0cbcf32d3acf6dfd10712e66a3)
(cherry picked from commit 2f56e2b54d0080cd22d3d8461567aa0364f983d8)
(cherry picked from commit 6df2dc8463c09239a97663d9c3b57d5bf873ee1b)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java

@@ -423,7 +423,8 @@ class BPServiceActor implements Runnable {
       final int nCmds = cmds.size();
       LOG.info((success ? "S" : "Uns") +
           "uccessfully sent block report 0x" +
-          Long.toHexString(reportId) + ",  containing " + reports.length +
+          Long.toHexString(reportId) + " to namenode: " + nnAddr +
+          ",  containing " + reports.length +
           " storage report(s), of which we sent " + numReportsSent + "." +
           " The reports had " + totalBlockCount +
           " total blocks and used " + numRPCs +
@@ -932,10 +933,12 @@ class BPServiceActor implements Runnable {
 
   void triggerBlockReport(BlockReportOptions options) {
     if (options.isIncremental()) {
-      LOG.info(bpos.toString() + ": scheduling an incremental block report.");
+      LOG.info(bpos.toString() + ": scheduling an incremental block report " +
+         "to namenode: " + nnAddr + ".");
       ibrManager.triggerIBR(true);
     } else {
-      LOG.info(bpos.toString() + ": scheduling a full block report.");
+      LOG.info(bpos.toString() + ": scheduling a full block report " +
+         "to namenode: " + nnAddr + ".");
       synchronized(ibrManager) {
         scheduler.forceFullBlockReportNow();
         ibrManager.notifyAll();