diff --git a/skywalking-protocol/src/main/java/com/ai/cloud/skywalking/protocol/Span.java b/skywalking-protocol/src/main/java/com/ai/cloud/skywalking/protocol/Span.java
index 4fef799b7..915ed0a43 100644
--- a/skywalking-protocol/src/main/java/com/ai/cloud/skywalking/protocol/Span.java
+++ b/skywalking-protocol/src/main/java/com/ai/cloud/skywalking/protocol/Span.java
@@ -192,9 +192,8 @@ public class Span extends SpanData {
 		try {
 			buf = new ByteArrayOutputStream();
 			Throwable causeException = e;
-			while (causeException != null
-					&& (causeException.getCause() != null || expMessage
-							.length() < maxExceptionStackLength)) {
+			while (expMessage.length() < maxExceptionStackLength && causeException != null
+					&& causeException.getCause() != null) {
 				causeException.printStackTrace(new java.io.PrintWriter(buf,
 						true));
 				expMessage.append(buf.toString());
@@ -209,7 +208,13 @@ public class Span extends SpanData {
 						"Close exception stack input stream failed", ioe);
 			}
 		}
-		this.exceptionStack = expMessage.toString();
+
+		int sublength = maxExceptionStackLength;
+		if (maxExceptionStackLength > expMessage.length()){
+			sublength = expMessage.length();
+		}
+
+		this.exceptionStack = expMessage.toString().substring(0, sublength);
 
 		if (!exclusiveExceptionSet.contains(e.getClass().getName())) {
 			this.statusCode = 1;
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 22d3e7d8a..436ee2b75 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
@@ -1,11 +1,12 @@
 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.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.*;
 import io.netty.channel.nio.NioEventLoopGroup;
 import io.netty.channel.socket.nio.NioServerSocketChannel;
 import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
@@ -14,18 +15,11 @@ import io.netty.handler.codec.bytes.ByteArrayDecoder;
 import io.netty.handler.codec.bytes.ByteArrayEncoder;
 import io.netty.handler.logging.LogLevel;
 import io.netty.handler.logging.LoggingHandler;
-
-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;
+import java.io.IOException;
+import java.util.Properties;
 
 public class CollectionServer {
 
@@ -49,7 +43,7 @@ public class CollectionServer {
                         @Override
                         public void initChannel(io.netty.channel.socket.SocketChannel ch) throws Exception {
                             ChannelPipeline p = ch.pipeline();
-                            p.addLast("frameDecoder", new LengthFieldBasedFrameDecoder(Integer.MAX_VALUE, 0, 4, 0, 4));
+                            p.addLast("frameDecoder", new LengthFieldBasedFrameDecoder(Integer.MAX_VALUE, 0, 4, 0, 0));
                             p.addLast("frameEncoder", new LengthFieldPrepender(4));
                             p.addLast("decoder", new ByteArrayDecoder());
                             p.addLast("encoder", new ByteArrayEncoder());
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 e660fdf39..cca00fba6 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
@@ -12,7 +12,26 @@ public class CollectionServerDataHandler extends SimpleChannelInboundHandler<byt
         Thread.currentThread().setName("ServerReceiver");
         // 当接受到这条消息的是空，则忽略
         if (msg != null && msg.length >= 0 && msg.length < Config.DataPackage.MAX_DATA_PACKAGE) {
-            DataBufferThreadContainer.getDataBufferThread().saveTemporarily(msg);
+            int start = 0;
+            int end;
+            while (start < msg.length) {
+                int length = bytesToInt(msg, start);
+                start = start + 4;
+                end = start + length;
+                byte[] dest = new byte[length];
+                System.arraycopy(msg, start, dest, 0, length);
+                DataBufferThreadContainer.getDataBufferThread().saveTemporarily(dest);
+                start = end;
+            }
         }
     }
+
+    public static int bytesToInt(byte[] ary, int offset) {
+        int value;
+        value = (int) ((ary[offset + 3] & 0xFF)
+                | ((ary[offset + 2] << 8) & 0xFF00)
+                | ((ary[offset + 1] << 16) & 0xFF0000)
+                | ((ary[offset] << 24) & 0xFF000000));
+        return value;
+    }
 }