diff --git a/src/main/java/com/profiler/sender/LoggingDataSender.java b/src/main/java/com/profiler/sender/LoggingDataSender.java
index 3a9afca7b..00d546ab7 100644
--- a/src/main/java/com/profiler/sender/LoggingDataSender.java
+++ b/src/main/java/com/profiler/sender/LoggingDataSender.java
@@ -16,13 +16,13 @@ public class LoggingDataSender implements DataSender {
 
     @Override
     public boolean send(TBase<?, ?> data) {
-        logger.info("send tBase:" + data);
+        logger.info("send tBase:{]", data);
         return true;
     }
 
     @Override
     public boolean send(Thriftable thriftable) {
-        logger.info("send thriftable:" + thriftable);
+        logger.info("send thriftable:{}", thriftable);
         return true;  //To change body of implemented methods use File | Settings | File Templates.
     }
 
diff --git a/src/main/java/com/profiler/sender/UdpDataSender.java b/src/main/java/com/profiler/sender/UdpDataSender.java
index bbf0b81b7..51265b043 100644
--- a/src/main/java/com/profiler/sender/UdpDataSender.java
+++ b/src/main/java/com/profiler/sender/UdpDataSender.java
@@ -200,7 +200,7 @@ public class UdpDataSender implements DataSender, Runnable {
 		} else if (dto instanceof Thriftable) {
 			tBase = ((Thriftable) dto).toThrift();
 		} else {
-			logger.warn("sendPacket fail. invalid type:" + dto.getClass());
+			logger.warn("sendPacket fail. invalid type:{}", dto.getClass());
 			return;
 		}
         // single thread이므로 데이터 array를 nocopy해서 보냄.
@@ -215,10 +215,10 @@ public class UdpDataSender implements DataSender, Runnable {
 		try {
 			udpSocket.send(reusePacket);
 			if (logger.isInfoEnabled()) {
-				logger.info("Data sent. " + dto);
+				logger.info("Data sent. {}", dto);
 			}
 		} catch (IOException e) {
-			logger.warn("packet send error " + dto, e);
+			logger.warn("packet send error {}", dto, e);
 		}
 	}
 
@@ -253,7 +253,7 @@ public class UdpDataSender implements DataSender, Runnable {
 			return serializer.serialize(header, dto);
 		} catch (TException e) {
 			if (logger.isWarnEnabled()) {
-				logger.warn("Serialize fail:" + dto + " Caused:" + e.getMessage(), e);
+                logger.warn("Serialize fail:{} Caused:{}", new Object[] { dto, e.getMessage(), e});
 			}
 			return null;
 		}