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 72c859b70..479b16678 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
@@ -8,163 +8,160 @@ import java.util.logging.Logger;
 
 public class Span extends SpanData {
 
-	private Logger logger = Logger.getLogger(Span.class.getName());
+    private Logger logger = Logger.getLogger(Span.class.getName());
 
-	public Span() {
-	}
+    public Span() {
+    }
 
-	public Span(String traceId, String applicationID, String userId) {
-		this.traceId = traceId;
-		this.applicationId = applicationID;
-		this.userId = userId;
-	}
+    public Span(String traceId, String applicationID, String userId) {
+        this.traceId = traceId;
+        this.applicationId = applicationID;
+        this.userId = userId;
+    }
 
-	public Span(String traceId, String parentLevelId, int levelId,
-			String applicationID, String userId) {
-		this.traceId = traceId;
-		this.applicationId = applicationID;
-		this.parentLevel = parentLevelId;
-		this.userId = userId;
-		this.levelId = levelId;
-	}
+    public Span(String traceId, String parentLevelId, int levelId,
+                String applicationID, String userId) {
+        this.traceId = traceId;
+        this.applicationId = applicationID;
+        this.parentLevel = parentLevelId;
+        this.userId = userId;
+        this.levelId = levelId;
+    }
 
-	public Span(String originData) {
-		String[] fieldValues = originData.split(SPAN_FIELD_SPILT_PATTERN);
-		traceId = fieldValues[0].trim();
-		parentLevel = fieldValues[1].trim();
-		levelId = Integer.valueOf(fieldValues[2]);
-		viewPointId = fieldValues[3].trim();
-		startDate = Long.valueOf(fieldValues[4]);
-		cost = Long.parseLong(fieldValues[5]);
-		address = fieldValues[6].trim();
-		statusCode = Byte.valueOf(fieldValues[7].trim());
-		// 异常情况才会存在exceptionStack
-		if (statusCode == 1) {
-			exceptionStack = fieldValues[8].trim().replaceAll(
-					SPAN_ATTR_SPILT_CHARACTER, NEW_LINE_CHARACTER_PATTERN);
-		}
-		spanType = fieldValues[9];
-		isReceiver = Boolean.valueOf(fieldValues[10]);
+    public Span(String originData) {
+        String[] fieldValues = originData.split(SPAN_FIELD_SPILT_PATTERN);
+        traceId = fieldValues[0].trim();
+        parentLevel = fieldValues[1].trim();
+        levelId = Integer.valueOf(fieldValues[2]);
+        viewPointId = fieldValues[3].trim();
+        startDate = Long.valueOf(fieldValues[4]);
+        cost = Long.parseLong(fieldValues[5]);
+        address = fieldValues[6].trim();
+        statusCode = Byte.valueOf(fieldValues[7].trim());
+        exceptionStack = fieldValues[8].trim().replaceAll(
+                SPAN_ATTR_SPILT_CHARACTER, NEW_LINE_CHARACTER_PATTERN);
+        spanType = fieldValues[9];
+        isReceiver = Boolean.valueOf(fieldValues[10]);
 
-		businessKey = fieldValues[11].trim().replaceAll(
-				SPAN_ATTR_SPILT_CHARACTER, NEW_LINE_CHARACTER_PATTERN);
-		processNo = fieldValues[12].trim();
-		applicationId = fieldValues[13].trim();
-		userId = fieldValues[14].trim();
-		this.originData = originData;
-	}
+        businessKey = fieldValues[11].trim().replaceAll(
+                SPAN_ATTR_SPILT_CHARACTER, NEW_LINE_CHARACTER_PATTERN);
+        processNo = fieldValues[12].trim();
+        applicationId = fieldValues[13].trim();
+        userId = fieldValues[14].trim();
+        this.originData = originData;
+    }
 
-	@Override
-	public String toString() {
-		StringBuilder toStringValue = new StringBuilder();
-		toStringValue.append(traceId + SPAN_FIELD_SPILT_PATTERN);
+    @Override
+    public String toString() {
+        StringBuilder toStringValue = new StringBuilder();
+        toStringValue.append(traceId + SPAN_FIELD_SPILT_PATTERN);
 
-		if (isNonBlank(parentLevel)) {
-			toStringValue.append(parentLevel + SPAN_FIELD_SPILT_PATTERN);
-		} else {
-			toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
-		}
+        if (isNonBlank(parentLevel)) {
+            toStringValue.append(parentLevel + SPAN_FIELD_SPILT_PATTERN);
+        } else {
+            toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
+        }
 
-		toStringValue.append(levelId + SPAN_FIELD_SPILT_PATTERN);
+        toStringValue.append(levelId + SPAN_FIELD_SPILT_PATTERN);
 
-		if (isNonBlank(viewPointId)) {
-			toStringValue.append(viewPointId + SPAN_FIELD_SPILT_PATTERN);
-		} else {
-			toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
-		}
+        if (isNonBlank(viewPointId)) {
+            toStringValue.append(viewPointId + SPAN_FIELD_SPILT_PATTERN);
+        } else {
+            toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
+        }
 
-		toStringValue.append(startDate + SPAN_FIELD_SPILT_PATTERN);
-		toStringValue.append(cost + SPAN_FIELD_SPILT_PATTERN);
+        toStringValue.append(startDate + SPAN_FIELD_SPILT_PATTERN);
+        toStringValue.append(cost + SPAN_FIELD_SPILT_PATTERN);
 
-		if (isNonBlank(address)) {
-			toStringValue.append(address + SPAN_FIELD_SPILT_PATTERN);
-		} else {
-			toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
-		}
+        if (isNonBlank(address)) {
+            toStringValue.append(address + SPAN_FIELD_SPILT_PATTERN);
+        } else {
+            toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
+        }
 
-		toStringValue.append(statusCode + SPAN_FIELD_SPILT_PATTERN);
+        toStringValue.append(statusCode + SPAN_FIELD_SPILT_PATTERN);
 
-		if (isNonBlank(exceptionStack)) {
-			// 换行符在各个系统中表现不一致，
-			// windows平台的换行符为/r/n
-			// linux平台的换行符为/n
-			toStringValue.append(exceptionStack.replaceAll(
-					CARRIAGE_RETURN_CHARACTER_PATTERN, "").replaceAll(
-					NEW_LINE_CHARACTER_PATTERN, SPAN_ATTR_SPILT_CHARACTER)
-					+ SPAN_FIELD_SPILT_PATTERN);
-		} else {
-			toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
-		}
+        if (isNonBlank(exceptionStack)) {
+            // 换行符在各个系统中表现不一致，
+            // windows平台的换行符为/r/n
+            // linux平台的换行符为/n
+            toStringValue.append(exceptionStack.replaceAll(
+                    CARRIAGE_RETURN_CHARACTER_PATTERN, "").replaceAll(
+                    NEW_LINE_CHARACTER_PATTERN, SPAN_ATTR_SPILT_CHARACTER)
+                    + SPAN_FIELD_SPILT_PATTERN);
+        } else {
+            toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
+        }
 
-		toStringValue.append(spanType + SPAN_FIELD_SPILT_PATTERN);
-		toStringValue.append(isReceiver + SPAN_FIELD_SPILT_PATTERN);
+        toStringValue.append(spanType + SPAN_FIELD_SPILT_PATTERN);
+        toStringValue.append(isReceiver + SPAN_FIELD_SPILT_PATTERN);
 
-		if (isNonBlank(businessKey)) {
-			// 换行符在各个系统中表现不一致，
-			// windows平台的换行符为/r/n
-			// linux平台的换行符为/n
-			toStringValue.append(businessKey.replaceAll(
-					CARRIAGE_RETURN_CHARACTER_PATTERN, "").replaceAll(
-					NEW_LINE_CHARACTER_PATTERN, SPAN_ATTR_SPILT_CHARACTER)
-					+ SPAN_FIELD_SPILT_PATTERN);
-		} else {
-			toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
-		}
+        if (isNonBlank(businessKey)) {
+            // 换行符在各个系统中表现不一致，
+            // windows平台的换行符为/r/n
+            // linux平台的换行符为/n
+            toStringValue.append(businessKey.replaceAll(
+                    CARRIAGE_RETURN_CHARACTER_PATTERN, "").replaceAll(
+                    NEW_LINE_CHARACTER_PATTERN, SPAN_ATTR_SPILT_CHARACTER)
+                    + SPAN_FIELD_SPILT_PATTERN);
+        } else {
+            toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
+        }
 
-		if (isNonBlank(processNo)) {
-			toStringValue.append(processNo + SPAN_FIELD_SPILT_PATTERN);
-		} else {
-			toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
-		}
+        if (isNonBlank(processNo)) {
+            toStringValue.append(processNo + SPAN_FIELD_SPILT_PATTERN);
+        } else {
+            toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
+        }
 
-		if (isNonBlank(applicationId)) {
-			toStringValue.append(applicationId + SPAN_FIELD_SPILT_PATTERN);
-		} else {
-			toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
-		}
+        if (isNonBlank(applicationId)) {
+            toStringValue.append(applicationId + SPAN_FIELD_SPILT_PATTERN);
+        } else {
+            toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
+        }
 
-		if (isNonBlank(userId)) {
-			toStringValue.append(userId);
-		} else {
-			toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
-		}
+        if (isNonBlank(userId)) {
+            toStringValue.append(userId);
+        } else {
+            toStringValue.append(" " + SPAN_FIELD_SPILT_PATTERN);
+        }
 
-		return toStringValue.toString();
-	}
+        return toStringValue.toString();
+    }
 
-	protected boolean isNonBlank(String str) {
-		return str != null && str.length() > 0;
-	}
+    protected boolean isNonBlank(String str) {
+        return str != null && str.length() > 0;
+    }
 
-	public void handleException(Throwable e, Set<String> exclusiveExceptionSet,
-			int maxExceptionStackLength) {
-		ByteArrayOutputStream buf = null;
-		StringBuilder expMessage = new StringBuilder();
-		try {
-			buf = new ByteArrayOutputStream();
-			Throwable causeException = e;
-			while (causeException != null
-					&& (causeException.getCause() != null || expMessage
-							.length() < maxExceptionStackLength)) {
-				causeException.printStackTrace(new java.io.PrintWriter(buf,
-						true));
-				expMessage.append(buf.toString());
-				causeException = causeException.getCause();
-			}
+    public void handleException(Throwable e, Set<String> exclusiveExceptionSet,
+                                int maxExceptionStackLength) {
+        ByteArrayOutputStream buf = null;
+        StringBuilder expMessage = new StringBuilder();
+        try {
+            buf = new ByteArrayOutputStream();
+            Throwable causeException = e;
+            while (causeException != null
+                    && (causeException.getCause() != null || expMessage
+                    .length() < maxExceptionStackLength)) {
+                causeException.printStackTrace(new java.io.PrintWriter(buf,
+                        true));
+                expMessage.append(buf.toString());
+                causeException = causeException.getCause();
+            }
 
-		} finally {
-			try {
-				buf.close();
-			} catch (IOException ioe) {
-				logger.log(Level.ALL,
-						"Close exception stack input stream failed", ioe);
-			}
-		}
-		this.exceptionStack = expMessage.toString();
+        } finally {
+            try {
+                buf.close();
+            } catch (IOException ioe) {
+                logger.log(Level.ALL,
+                        "Close exception stack input stream failed", ioe);
+            }
+        }
+        this.exceptionStack = expMessage.toString();
 
-		if (!exclusiveExceptionSet.contains(e.getClass().getName())) {
-			this.statusCode = 1;
-		}
-	}
+        if (!exclusiveExceptionSet.contains(e.getClass().getName())) {
+            this.statusCode = 1;
+        }
+    }
 
 }
diff --git a/skywalking-protocol/src/main/java/com/ai/cloud/skywalking/protocol/SpanData.java b/skywalking-protocol/src/main/java/com/ai/cloud/skywalking/protocol/SpanData.java
index ab1d2d8b4..0c3421ed2 100644
--- a/skywalking-protocol/src/main/java/com/ai/cloud/skywalking/protocol/SpanData.java
+++ b/skywalking-protocol/src/main/java/com/ai/cloud/skywalking/protocol/SpanData.java
@@ -113,6 +113,10 @@ public abstract class SpanData {
         return exceptionStack;
     }
 
+    public void setExceptionStack(String exceptionStack) {
+        this.exceptionStack = exceptionStack;
+    }
+
     public String getBusinessKey() {
         return businessKey;
     }