diff --git a/src/org/redkale/net/PrepareServlet.java b/src/org/redkale/net/PrepareServlet.java
index 6cd757eae..4eea2af3a 100644
--- a/src/org/redkale/net/PrepareServlet.java
+++ b/src/org/redkale/net/PrepareServlet.java
@@ -15,7 +15,7 @@ import org.redkale.util.*;
 
 /**
  * 根Servlet， 一个Server只能存在一个根Servlet
- * 
+ *
  * 用于分发Request请求
  *
  * <p>
@@ -34,9 +34,33 @@ public abstract class PrepareServlet<K extends Serializable, C extends Context,
 
     protected final AtomicLong illRequestCounter = new AtomicLong(); //错误请求次数
 
-    protected final Set<S> servlets = new HashSet<>();
+    private final Object lock1 = new Object();
 
-    protected final Map<K, S> mappings = new HashMap<>();
+    private Set<S> servlets = new HashSet<>();
+
+    private final Object lock2 = new Object();
+
+    private Map<K, S> mappings = new HashMap<>();
+
+    protected void putServlet(S servlet) {
+        synchronized (lock1) {
+            Set<S> newservlets = new HashSet<>(servlets);
+            newservlets.add(servlet);
+            this.servlets = newservlets;
+        }
+    }
+
+    protected void putMapping(K key, S value) {
+        synchronized (lock2) {
+            Map<K, S> newmappings = new HashMap<>(mappings);
+            newmappings.put(key, value);
+            this.mappings = newmappings;
+        }
+    }
+
+    protected S mappingServlet(K key) {
+        return mappings.get(key);
+    }
 
     public abstract void addServlet(S servlet, Object attachment, AnyValue conf, K... mappings);
 
diff --git a/src/org/redkale/net/http/HttpPrepareServlet.java b/src/org/redkale/net/http/HttpPrepareServlet.java
index 986d95e24..b8f544d55 100644
--- a/src/org/redkale/net/http/HttpPrepareServlet.java
+++ b/src/org/redkale/net/http/HttpPrepareServlet.java
@@ -37,7 +37,8 @@ public class HttpPrepareServlet extends PrepareServlet<String, HttpContext, Http
 
     @Override
     public void init(HttpContext context, AnyValue config) {
-        this.servlets.forEach(s -> {
+        Collection<HttpServlet> servlets = getServlets();
+        servlets.forEach(s -> {
             if (s instanceof WebSocketServlet) {
                 ((WebSocketServlet) s).preInit(context, getServletConf(s));
             } else if (s instanceof HttpBaseServlet) {
@@ -47,7 +48,7 @@ public class HttpPrepareServlet extends PrepareServlet<String, HttpContext, Http
         });
         final WatchFactory watch = context.getWatchFactory();
         if (watch != null) {
-            this.servlets.forEach(s -> {
+            servlets.forEach(s -> {
                 watch.inject(s);
             });
         }
@@ -82,7 +83,7 @@ public class HttpPrepareServlet extends PrepareServlet<String, HttpContext, Http
     public void execute(HttpRequest request, HttpResponse response) throws IOException {
         try {
             final String uri = request.getRequestURI();
-            Servlet<HttpContext, HttpRequest, HttpResponse> servlet = this.mappings.isEmpty() ? null : this.mappings.get(uri);
+            Servlet<HttpContext, HttpRequest, HttpResponse> servlet = mappingServlet(uri);
             if (servlet == null && this.regArray != null) {
                 for (SimpleEntry<Predicate<String>, HttpServlet> en : regArray) {
                     if (en.getKey().test(uri)) {
@@ -138,7 +139,7 @@ public class HttpPrepareServlet extends PrepareServlet<String, HttpContext, Http
                         regArray[regArray.length - 1] = new SimpleEntry<>(Pattern.compile(mapping).asPredicate(), servlet);
                     }
                 } else if (mapping != null && !mapping.isEmpty()) {
-                    super.mappings.put(mapping, servlet);
+                    putMapping(mapping, servlet);
                 }
                 if (this.allMapStrings.containsKey(mapping)) {
                     Class old = this.allMapStrings.get(mapping);
@@ -148,7 +149,7 @@ public class HttpPrepareServlet extends PrepareServlet<String, HttpContext, Http
             }
             setServletConf(servlet, conf);
             servlet._prefix = prefix.toString();
-            this.servlets.add(servlet);
+            putServlet(servlet);
         }
     }
 
@@ -175,7 +176,7 @@ public class HttpPrepareServlet extends PrepareServlet<String, HttpContext, Http
     @Override
     public void destroy(HttpContext context, AnyValue config) {
         this.resourceHttpServlet.destroy(context, config);
-        this.servlets.forEach(s -> {
+        getServlets().forEach(s -> {
             s.destroy(context, getServletConf(s));
             if (s instanceof WebSocketServlet) {
                 ((WebSocketServlet) s).postDestroy(context, getServletConf(s));
diff --git a/src/org/redkale/net/sncp/SncpPrepareServlet.java b/src/org/redkale/net/sncp/SncpPrepareServlet.java
index 167e050e5..934bb5220 100644
--- a/src/org/redkale/net/sncp/SncpPrepareServlet.java
+++ b/src/org/redkale/net/sncp/SncpPrepareServlet.java
@@ -30,26 +30,22 @@ public class SncpPrepareServlet extends PrepareServlet<DLong, SncpContext, SncpR
 
     public void addServlet(SncpServlet servlet, AnyValue conf) {
         setServletConf(servlet, conf);
-        synchronized (mappings) {
-            mappings.put(servlet.getServiceid(), servlet);
-            servlets.add(servlet);
-        }
+        putMapping(servlet.getServiceid(), servlet);
+        putServlet(servlet);
     }
 
     public List<SncpServlet> getSncpServlets() {
-        ArrayList<SncpServlet> list = new ArrayList<>(servlets.size());
-        servlets.forEach(x -> list.add((SncpServlet) x));
-        return list;
+        return new ArrayList<>(getServlets());
     }
 
     @Override
     public void init(SncpContext context, AnyValue config) {
-        servlets.forEach(s -> s.init(context, getServletConf(s)));
+        getServlets().forEach(s -> s.init(context, getServletConf(s)));
     }
 
     @Override
     public void destroy(SncpContext context, AnyValue config) {
-        servlets.forEach(s -> s.destroy(context, getServletConf(s)));
+        getServlets().forEach(s -> s.destroy(context, getServletConf(s)));
     }
 
     @Override
@@ -58,7 +54,7 @@ public class SncpPrepareServlet extends PrepareServlet<DLong, SncpContext, SncpR
             response.finish(pongBuffer.duplicate());
             return;
         }
-        SncpServlet servlet = (SncpServlet) mappings.get(request.getServiceid());
+        SncpServlet servlet = (SncpServlet) mappingServlet(request.getServiceid());
         if (servlet == null) {
             response.finish(SncpResponse.RETCODE_ILLSERVICEID, null);  //无效serviceid
         } else {