diff --git a/src/main/java/com/nhn/pinpoint/rpc/client/PinpointSocketFactory.java b/src/main/java/com/nhn/pinpoint/rpc/client/PinpointSocketFactory.java
index 4fb6c192c..e1fdd6747 100644
--- a/src/main/java/com/nhn/pinpoint/rpc/client/PinpointSocketFactory.java
+++ b/src/main/java/com/nhn/pinpoint/rpc/client/PinpointSocketFactory.java
@@ -18,7 +18,6 @@ import java.net.SocketAddress;
 import java.util.Set;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
-import java.util.concurrent.ThreadFactory;
 import java.util.concurrent.TimeUnit;
 
 /**