HDFS-17429. Fixing wrong log file name in datatransfer Sender.java (#6670) Contributed by Zhongkun Wu.

Reviewed-by: Ayush Saxena <ayushsaxena@apache.org>
Signed-off-by: Shilun Fan <slfan1989@apache.org>

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocol/datatransfer/Sender.java

@@ -57,11 +57,16 @@ import org.apache.hadoop.tracing.Tracer;
 import org.apache.hadoop.tracing.TraceUtils;
 
 import org.apache.hadoop.thirdparty.protobuf.Message;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 
 /** Sender */
 @InterfaceAudience.Private
 @InterfaceStability.Evolving
 public class Sender implements DataTransferProtocol {
+  private static final Logger LOG = LoggerFactory.getLogger(Sender.class);
+
   private final DataOutputStream out;
 
   /** Create a sender for DataTransferProtocol with a output stream. */