HDFS-10292. Add block id when client got Unable to close file exception. Contributed by Brahma Reddy Battula.

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSOutputStream.java

@@ -811,7 +811,7 @@ protected void completeFile(ExtendedBlock last) throws IOException {
         try {
           if (retries == 0) {
             throw new IOException("Unable to close file because the last block"
-                + " does not have enough number of replicas.");
+                + last + " does not have enough number of replicas.");
           }
           retries--;
           Thread.sleep(sleeptime);