diff --git a/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/CollectionServer.java b/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/CollectionServer.java
index 1c874d214837f91f01c951c4e271737e2b78895f..22d3e7d8aa558fe4647ad1b468eb7b7b14191179 100644
--- a/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/CollectionServer.java
+++ b/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/CollectionServer.java
@@ -1,29 +1,32 @@
 package com.ai.cloud.skywalking.reciever;
 
-import com.ai.cloud.skywalking.reciever.buffer.DataBufferThreadContainer;
-import com.ai.cloud.skywalking.reciever.conf.Config;
-import com.ai.cloud.skywalking.reciever.conf.ConfigInitializer;
-import com.ai.cloud.skywalking.reciever.handler.CollectionServerDataHandler;
-import com.ai.cloud.skywalking.reciever.persistance.PersistenceThreadLauncher;
 import io.netty.bootstrap.ServerBootstrap;
-import io.netty.channel.*;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.ChannelOption;
+import io.netty.channel.ChannelPipeline;
+import io.netty.channel.EventLoopGroup;
 import io.netty.channel.nio.NioEventLoopGroup;
 import io.netty.channel.socket.nio.NioServerSocketChannel;
 import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
 import io.netty.handler.codec.LengthFieldPrepender;
 import io.netty.handler.codec.bytes.ByteArrayDecoder;
 import io.netty.handler.codec.bytes.ByteArrayEncoder;
-import io.netty.handler.codec.string.StringDecoder;
-import io.netty.handler.codec.string.StringEncoder;
 import io.netty.handler.logging.LogLevel;
 import io.netty.handler.logging.LoggingHandler;
-import io.netty.util.CharsetUtil;
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
 
 import java.io.IOException;
 import java.util.Properties;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import com.ai.cloud.skywalking.reciever.buffer.DataBufferThreadContainer;
+import com.ai.cloud.skywalking.reciever.conf.Config;
+import com.ai.cloud.skywalking.reciever.conf.ConfigInitializer;
+import com.ai.cloud.skywalking.reciever.handler.CollectionServerDataHandler;
+import com.ai.cloud.skywalking.reciever.persistance.PersistenceThreadLauncher;
+
 public class CollectionServer {
 
     static Logger logger = LogManager.getLogger(CollectionServer.class);
diff --git a/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/handler/CollectionServerDataHandler.java b/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/handler/CollectionServerDataHandler.java
index 5dd2624727b84a02c09b6f0a8bff9773451d96d8..bd2f6ec0e7d0597360d9c637aebb60ce14f5a145 100644
--- a/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/handler/CollectionServerDataHandler.java
+++ b/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/handler/CollectionServerDataHandler.java
@@ -1,10 +1,10 @@
 package com.ai.cloud.skywalking.reciever.handler;
 
-import com.ai.cloud.skywalking.reciever.buffer.DataBufferThreadContainer;
-import com.ai.cloud.skywalking.reciever.util.ByteArrayUtil;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.SimpleChannelInboundHandler;
 
+import com.ai.cloud.skywalking.reciever.buffer.DataBufferThreadContainer;
+
 public class CollectionServerDataHandler extends SimpleChannelInboundHandler<byte[]> {
     @Override
     protected void channelRead0(ChannelHandlerContext ctx, byte[] msg) throws Exception {