diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/buffer/BufferGroup.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/buffer/BufferGroup.java
index 070695cbc..12e621287 100644
--- a/skywalking-api/src/main/java/com/ai/cloud/skywalking/buffer/BufferGroup.java
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/buffer/BufferGroup.java
@@ -2,6 +2,7 @@ package com.ai.cloud.skywalking.buffer;
 
 
 import com.ai.cloud.skywalking.conf.Config;
+import com.ai.cloud.skywalking.conf.Constants;
 import com.ai.cloud.skywalking.protocol.Span;
 import com.ai.cloud.skywalking.selfexamination.HealthCollector;
 import com.ai.cloud.skywalking.selfexamination.HeathReading;
@@ -76,7 +77,7 @@ public class BufferGroup {
                         data = new StringBuilder();
                     }
 
-                    data.append(dataBuffer[i] + ";");
+                    data.append(dataBuffer[i] + Constants.DATA_SPILT);
                     dataBuffer[i] = null;
                 }
 
diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/AuthDesc.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/AuthDesc.java
index 07545fe07..546ae127f 100644
--- a/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/AuthDesc.java
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/AuthDesc.java
@@ -5,6 +5,7 @@ public class AuthDesc {
 
     static {
         ConfigInitializer.initialize();
+        ConfigValidator.validate();
     }
 
     public static boolean isAuth() {
diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/Config.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/Config.java
index 0149406a3..57c6e98fb 100644
--- a/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/Config.java
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/Config.java
@@ -30,7 +30,7 @@ public class Config {
 
 	public static class Buffer {
 		// 每个Buffer的最大个数
-		public static int BUFFER_MAX_SIZE = 18000;
+		public static int BUFFER_MAX_SIZE = 20000;
 
 		// Buffer池的最大长度
 		public static int POOL_SIZE = 5;
@@ -47,7 +47,7 @@ public class Config {
 		public static boolean IS_OFF = false;
 
 		// 发送的最大长度
-		public static int MAX_SEND_LENGTH = 1800;
+		public static int MAX_SEND_LENGTH = 18500;
 
 		public static long RETRY_GET_SENDER_WAIT_INTERVAL = 2000L;
 
diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/ConfigValidator.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/ConfigValidator.java
new file mode 100644
index 000000000..9c35319dd
--- /dev/null
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/ConfigValidator.java
@@ -0,0 +1,26 @@
+package com.ai.cloud.skywalking.conf;
+
+public class ConfigValidator {
+    private ConfigValidator() {
+        // Non
+    }
+
+    public static boolean validate() {
+        if (!validateSendMaxLength()) {
+            throw new IllegalArgumentException("Max send length must great than the sum of the maximum " +
+                    "length of sending exception stack and the maximum length of sending business key.");
+        }
+
+        return true;
+    }
+
+    private static boolean validateSendMaxLength() {
+        if (Config.Sender.MAX_SEND_LENGTH < (Config.BuriedPoint.MAX_EXCEPTION_STACK_LENGTH +
+                Config.BuriedPoint.BUSINESSKEY_MAX_LENGTH)) {
+            return false;
+        }
+
+        return true;
+    }
+
+}
diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/Constants.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/Constants.java
index c48e4a324..ee52e249a 100644
--- a/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/Constants.java
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/Constants.java
@@ -3,4 +3,6 @@ package com.ai.cloud.skywalking.conf;
 public class Constants {
 
     public static final String HEALTH_DATA_SPILT_PATTERN = "^~";
+
+    public static final String DATA_SPILT = ",";
 }