diff --git a/net/src/main/java/com/zfoo/net/router/attachment/SignalAttachment.java b/net/src/main/java/com/zfoo/net/router/attachment/SignalAttachment.java
index 7de58db3..d4c9e457 100644
--- a/net/src/main/java/com/zfoo/net/router/attachment/SignalAttachment.java
+++ b/net/src/main/java/com/zfoo/net/router/attachment/SignalAttachment.java
@@ -26,6 +26,10 @@ public class SignalAttachment implements IAttachment {
 
     public static final short PROTOCOL_ID = 0;
 
+    /**
+     * EN:Negative signalId are allowed
+     * CN:允许负数的signalId
+     */
     public static final AtomicInteger ATOMIC_ID = new AtomicInteger(0);
 
     /**
diff --git a/net/src/main/java/com/zfoo/net/session/Session.java b/net/src/main/java/com/zfoo/net/session/Session.java
index bcbdd2fb..0e4226b5 100644
--- a/net/src/main/java/com/zfoo/net/session/Session.java
+++ b/net/src/main/java/com/zfoo/net/session/Session.java
@@ -28,9 +28,9 @@ public class Session implements Closeable {
     private static final AtomicLong ATOMIC_LONG = new AtomicLong(0);
 
     /**
-     * The globally unique ID of the session
+     * The globally unique ID of the session and the negative sid are allowed
      */
-    private long sid;
+    private long sid = ATOMIC_LONG.incrementAndGet();
 
     private Channel channel;
 
@@ -52,10 +52,6 @@ public class Session implements Closeable {
         if (channel == null) {
             throw new IllegalArgumentException("channel cannot be empty");
         }
-	    this.sid = ATOMIC_LONG.incrementAndGet();
-	    if (this.sid <= 0) {
-		    throw new IllegalArgumentException("sid cannot be 0");
-	    }
         this.channel = channel;
     }
 
@@ -91,10 +87,6 @@ public class Session implements Closeable {
         return sid;
     }
 
-    public void setSid(long sid) {
-        this.sid = sid;
-    }
-
     public Channel getChannel() {
         return channel;
     }
diff --git a/net/src/main/java/com/zfoo/net/session/SessionManager.java b/net/src/main/java/com/zfoo/net/session/SessionManager.java
index 3cf4bf0f..57d7b965 100644
--- a/net/src/main/java/com/zfoo/net/session/SessionManager.java
+++ b/net/src/main/java/com/zfoo/net/session/SessionManager.java
@@ -68,8 +68,8 @@ public class SessionManager implements ISessionManager {
     }
 
     @Override
-    public Session getServerSession(long id) {
-        return serverSessionMap.get(id);
+    public Session getServerSession(long sid) {
+        return serverSessionMap.get(sid);
     }
 
     @Override
@@ -105,8 +105,8 @@ public class SessionManager implements ISessionManager {
     }
 
     @Override
-    public Session getClientSession(long id) {
-        return clientSessionMap.get(id);
+    public Session getClientSession(long sid) {
+        return clientSessionMap.get(sid);
     }
 
     @Override
diff --git a/protocol/src/main/java/com/zfoo/protocol/util/ReflectionUtils.java b/protocol/src/main/java/com/zfoo/protocol/util/ReflectionUtils.java
index 009b9d25..3191f494 100644
--- a/protocol/src/main/java/com/zfoo/protocol/util/ReflectionUtils.java
+++ b/protocol/src/main/java/com/zfoo/protocol/util/ReflectionUtils.java
@@ -330,7 +330,7 @@ public abstract class ReflectionUtils {
         var methodName = "get" + StringUtils.capitalize(fieldName);
 
         try {
-            clazz.getDeclaredMethod(methodName, null);
+            clazz.getDeclaredMethod(methodName);
             return methodName;
         } catch (NoSuchMethodException e) {
             // java的get方法对boolean值有可能对应get或者is，所以尝试获取两种不同的get方法，当两种都获取不到才抛异常
@@ -340,14 +340,14 @@ public abstract class ReflectionUtils {
         // 如果属性名以大写字母开头，属性名直接用作 getter/setter 方法中 get/set 的后部分。例如属性名为Name，对应的方法是getName/setName。
         methodName = "get" + fieldName;
         try {
-            clazz.getDeclaredMethod(methodName, null);
+            clazz.getDeclaredMethod(methodName);
             return methodName;
         } catch (NoSuchMethodException e) {
         }
 
         methodName = "is" + StringUtils.capitalize(fieldName);
         try {
-            clazz.getDeclaredMethod(methodName, null);
+            clazz.getDeclaredMethod(methodName);
             return methodName;
         } catch (NoSuchMethodException e) {
             throw new RunException("field:[{}] has no getMethod or isMethod in class:[{}]", field.getName(), clazz.getCanonicalName());