diff --git a/src/org/redkale/boot/Application.java b/src/org/redkale/boot/Application.java
index 72a7db391..f7aa562ed 100644
--- a/src/org/redkale/boot/Application.java
+++ b/src/org/redkale/boot/Application.java
@@ -434,7 +434,8 @@ public final class Application {
                 others.add(entry);
             }
         }
-        if (!sncps.isEmpty() && globalNodes.isEmpty()) throw new RuntimeException("found SNCP Server node but not found <group> node info.");
+        //单向SNCP服务不需要对等group
+        //if (!sncps.isEmpty() && globalNodes.isEmpty()) throw new RuntimeException("found SNCP Server node but not found <group> node info.");
 
         runServers(timecd, sncps);  //必须确保sncp都启动后再启动其他协议
         runServers(timecd, others);
diff --git a/src/org/redkale/boot/NodeServer.java b/src/org/redkale/boot/NodeServer.java
index 161e99519..be1e93766 100644
--- a/src/org/redkale/boot/NodeServer.java
+++ b/src/org/redkale/boot/NodeServer.java
@@ -119,7 +119,8 @@ public abstract class NodeServer {
             String host = this.serverConf.getValue("host", "0.0.0.0").replace("0.0.0.0", "");
             this.sncpAddress = new InetSocketAddress(host.isEmpty() ? application.localAddress.getHostAddress() : host, this.serverConf.getIntValue("port"));
             this.sncpGroup = application.globalNodes.get(this.sncpAddress);
-            if (this.sncpGroup == null) throw new RuntimeException("Server (" + String.valueOf(config).replaceAll("\\s+", " ") + ") not found <group> info");
+            //单向SNCP服务不需要对等group
+            //if (this.sncpGroup == null) throw new RuntimeException("Server (" + String.valueOf(config).replaceAll("\\s+", " ") + ") not found <group> info");
         }
 
         if (this.sncpAddress != null) this.resourceFactory.register(RESNAME_SERVER_ADDR, this.sncpAddress); //单点服务不会有 sncpAddress、sncpGroup
@@ -137,7 +138,7 @@ public abstract class NodeServer {
             resourceFactory.register(Server.RESNAME_SERVER_ROOT, Path.class, myroot.toPath());
 
             final String homepath = myroot.getCanonicalPath();
-            Server.loadLib(logger, config.getValue("lib", "") + ";" + homepath + "/lib/*;" + homepath + "/classes");
+            Server.loadLib(logger, config.getValue("lib", "").replace("${APP_HOME}", homepath) + ";" + homepath + "/lib/*;" + homepath + "/classes");
             if (server != null) server.init(config);
         }
 
@@ -272,7 +273,7 @@ public abstract class NodeServer {
             if (entry.getName().contains("$")) throw new RuntimeException("<name> value cannot contains '$' in " + entry.getProperty());
             if (resourceFactory.find(entry.getName(), type) != null) continue; //Server加载Service时需要判断是否已经加载过了。
             final HashSet<String> groups = entry.getGroups(); //groups.isEmpty()表示<services>没有配置groups属性。
-            if (groups.isEmpty() && isSNCP()) groups.add(this.sncpGroup);
+            if (groups.isEmpty() && isSNCP() && this.sncpGroup != null) groups.add(this.sncpGroup);
 
             final boolean localed = (this.sncpAddress == null && !type.isInterface() && !Modifier.isAbstract(type.getModifiers())) //非SNCP的Server，通常是单点服务
                     || groups.contains(this.sncpGroup) //本地IP含在内的
@@ -286,16 +287,18 @@ public abstract class NodeServer {
                 service = Sncp.createRemoteService(entry.getName(), getExecutor(), type, this.sncpAddress, loadTransport(groups));
             }
             final ServiceWrapper wrapper = new ServiceWrapper(type, service, entry.getName(), localed ? this.sncpGroup : null, groups, entry.getProperty());
-            if (resourceFactory.find(wrapper.getName(), wrapper.getType()) == null) {
-                regFactory.register(wrapper.getName(), wrapper.getService());
-                if (wrapper.isRemote()) {
-                    remoteServiceWrappers.add(wrapper);
-                } else {
-                    localServiceWrappers.add(wrapper);
-                    if (consumer != null) consumer.accept(wrapper);
+            for (final Class restype : wrapper.getTypes()) {
+                if (resourceFactory.find(wrapper.getName(), restype) == null) {
+                    regFactory.register(wrapper.getName(), restype, wrapper.getService());
+                } else if (isSNCP() && !entry.isAutoload()) {
+                    throw new RuntimeException(ServiceWrapper.class.getSimpleName() + "(class:" + type.getName() + ", name:" + entry.getName() + ", group:" + groups + ") is repeat.");
                 }
-            } else if (isSNCP() && !entry.isAutoload()) {
-                throw new RuntimeException(ServiceWrapper.class.getSimpleName() + "(class:" + type.getName() + ", name:" + entry.getName() + ", group:" + groups + ") is repeat.");
+            }
+            if (wrapper.isRemote()) {
+                remoteServiceWrappers.add(wrapper);
+            } else {
+                localServiceWrappers.add(wrapper);
+                if (consumer != null) consumer.accept(wrapper);
             }
         }
         application.servicecdl.countDown();
diff --git a/src/org/redkale/net/sncp/ServiceWrapper.java b/src/org/redkale/net/sncp/ServiceWrapper.java
index 8ff3632df..4a50c4028 100644
--- a/src/org/redkale/net/sncp/ServiceWrapper.java
+++ b/src/org/redkale/net/sncp/ServiceWrapper.java
@@ -8,6 +8,7 @@ package org.redkale.net.sncp;
 import org.redkale.service.Service;
 import org.redkale.util.AnyValue;
 import java.util.*;
+import java.util.stream.*;
 import org.redkale.util.*;
 
 /**
@@ -25,8 +26,6 @@ public final class ServiceWrapper<T extends Service> implements Comparable<Servi
 
     private static volatile int maxNameLength = 0;
 
-    private final Class<T> type;
-
     private final T service;
 
     private final AnyValue conf;
@@ -39,10 +38,9 @@ public final class ServiceWrapper<T extends Service> implements Comparable<Servi
 
     private final boolean remote;
 
-    private final Class[] resTypes;
+    private final Class[] types;
 
     public ServiceWrapper(Class<T> type, T service, String name, String sncpGroup, Set<String> groups, AnyValue conf) {
-        this.type = type == null ? (Class<T>) service.getClass() : type;
         this.service = service;
         this.conf = conf;
         this.sncpGroup = sncpGroup;
@@ -50,16 +48,36 @@ public final class ServiceWrapper<T extends Service> implements Comparable<Servi
         this.name = name;
         this.remote = Sncp.isRemote(service);
         ResourceType rty = service.getClass().getAnnotation(ResourceType.class);
-        this.resTypes = rty == null ? new Class[]{this.type} : rty.value();
+        this.types = rty == null ? new Class[]{type == null ? (Class<T>) service.getClass() : type} : rty.value();
 
         maxNameLength = Math.max(maxNameLength, name.length());
-        maxClassNameLength = Math.max(maxClassNameLength, type.getName().length() + 1);
+        StringBuilder s = new StringBuilder();
+        if (this.types.length == 1) {
+            s.append(types[0].getName());
+        } else {
+            s.append('[');
+            s.append(Arrays.asList(this.types).stream().map((Class t) -> t.getName()).collect(Collectors.joining(",")));
+            s.append(']');
+        }
+        maxClassNameLength = Math.max(maxClassNameLength, s.length() + 1);
     }
 
     public String toSimpleString() {
         StringBuilder sb = new StringBuilder();
-        sb.append(remote ? "RemoteService" : "LocalService ").append("(type=").append(type.getName());
-        int len = maxClassNameLength - type.getName().length();
+        sb.append(remote ? "RemoteService" : "LocalService ");
+        int len;
+        if (types.length == 1) {
+            sb.append("(type= ").append(types[0].getName());
+            len = maxClassNameLength - types[0].getName().length();
+        } else {
+            StringBuilder s = new StringBuilder();
+            s.append('[');
+            s.append(Arrays.asList(this.types).stream().map((Class t) -> t.getName()).collect(Collectors.joining(",")));
+            s.append(']');
+            sb.append("(types=").append(s);
+            len = maxClassNameLength - s.length();
+        }
+
         for (int i = 0; i < len; i++) {
             sb.append(' ');
         }
@@ -77,13 +95,13 @@ public final class ServiceWrapper<T extends Service> implements Comparable<Servi
         if (obj == null) return false;
         if (!(obj instanceof ServiceWrapper)) return false;
         ServiceWrapper other = (ServiceWrapper) obj;
-        return (this.type.equals(other.type) && this.remote == other.remote && this.name.equals(other.name) && Objects.equals(this.sncpGroup, other.sncpGroup));
+        return (this.types[0].equals(other.types[0]) && this.remote == other.remote && this.name.equals(other.name) && Objects.equals(this.sncpGroup, other.sncpGroup));
     }
 
     @Override
     public int hashCode() {
         int hash = 3;
-        hash = 67 * hash + Objects.hashCode(this.type);
+        hash = 67 * hash + Objects.hashCode(this.types[0]);
         hash = 67 * hash + Objects.hashCode(this.sncpGroup);
         hash = 67 * hash + Objects.hashCode(this.name);
         hash = 67 * hash + (this.remote ? 1 : 0);
@@ -92,17 +110,13 @@ public final class ServiceWrapper<T extends Service> implements Comparable<Servi
 
     @Override
     public int compareTo(ServiceWrapper o) {
-        int rs = this.type.getName().compareTo(o.type.getName());
+        int rs = this.types[0].getName().compareTo(o.types[0].getName());
         if (rs == 0) rs = this.name.compareTo(o.name);
         return rs;
     }
 
-    public Class<? extends Service> getType() {
-        return type;
-    }
-
-    public Class[] getResTypes() {
-        return resTypes;
+    public Class[] getTypes() {
+        return types;
     }
 
     public Service getService() {
diff --git a/src/org/redkale/net/sncp/Sncp.java b/src/org/redkale/net/sncp/Sncp.java
index 9d07ac0cc..27b50a267 100644
--- a/src/org/redkale/net/sncp/Sncp.java
+++ b/src/org/redkale/net/sncp/Sncp.java
@@ -57,19 +57,20 @@ public abstract class Sncp {
         return ((0L + ip.getPort()) << 32) | ((0xffffffff & bytes[0]) << 24) | ((0xffffff & bytes[1]) << 16) | ((0xffff & bytes[2]) << 8) | (0xff & bytes[3]);
     }
 
-    public static DLong hash(final Class clazz) {
-        if (clazz == null) return DLong.ZERO;
-        return hash(clazz.getName());
-    }
-
-    public static DLong hashClass(final String clazzName) {
-        if (clazzName == null || clazzName.isEmpty()) return DLong.ZERO;
-        return hash(clazzName);
-    }
-
     public static DLong hash(final java.lang.reflect.Method method) {
         if (method == null) return DLong.ZERO;
-        return hash(method.toString());
+        StringBuilder sb = new StringBuilder(); //不能使用method.toString() 因为包含declaringClass信息导致接口与实现类的方法hash不一致
+        sb.append(method.getReturnType().getName()).append(' ');
+        sb.append(method.getName());
+        sb.append('(');
+        boolean first = true;
+        for (Class pt : method.getParameterTypes()) {
+            if (!first) sb.append(',');
+            sb.append(pt.getName());
+            first = false;
+        }
+        sb.append(')');
+        return hash(sb.toString());
     }
 
     /**
diff --git a/src/org/redkale/net/sncp/SncpClient.java b/src/org/redkale/net/sncp/SncpClient.java
index 8aa29f612..f63662f7c 100644
--- a/src/org/redkale/net/sncp/SncpClient.java
+++ b/src/org/redkale/net/sncp/SncpClient.java
@@ -139,8 +139,8 @@ public final class SncpClient {
 
     protected final Consumer<Runnable> executor;
 
-    public <T extends Service> SncpClient(final String serviceName, final Class<T> serviceType, final Consumer<Runnable> executor, boolean remote,
-            final Class serviceClass, final InetSocketAddress clientAddress) {
+    public <T extends Service> SncpClient(final String serviceName, final Class<T> serviceType, final Consumer<Runnable> executor,
+            final boolean remote, final Class serviceClass, final InetSocketAddress clientAddress) {
         this.remote = remote;
         this.executor = executor;
         this.serviceClass = serviceClass;
@@ -150,8 +150,7 @@ public final class SncpClient {
         final List<SncpAction> methodens = new ArrayList<>();
         //------------------------------------------------------------------------------
         for (java.lang.reflect.Method method : parseMethod(serviceClass)) {
-            SncpAction en = new SncpAction(method, Sncp.hash(method));
-            methodens.add(en);
+            methodens.add(new SncpAction(method, Sncp.hash(method)));
         }
         this.actions = methodens.toArray(new SncpAction[methodens.size()]);
         this.addrBytes = clientAddress == null ? new byte[4] : clientAddress.getAddress().getAddress();
diff --git a/src/org/redkale/net/sncp/SncpServer.java b/src/org/redkale/net/sncp/SncpServer.java
index 07ead6b0a..f35862e85 100644
--- a/src/org/redkale/net/sncp/SncpServer.java
+++ b/src/org/redkale/net/sncp/SncpServer.java
@@ -36,10 +36,11 @@ public final class SncpServer extends Server<DLong, SncpContext, SncpRequest, Sn
         super.init(config);
     }
 
-    public SncpDynServlet addService(ServiceWrapper entry) {
-        SncpDynServlet sds = new SncpDynServlet(BsonFactory.root().getConvert(), entry.getName(), entry.getType(), entry.getService());
-        this.prepare.addServlet(sds, null, entry.getConf());
-        return sds;
+    public void addService(ServiceWrapper entry) {
+        for (Class type : entry.getTypes()) {
+            SncpDynServlet sds = new SncpDynServlet(BsonFactory.root().getConvert(), entry.getName(), type, entry.getService());
+            this.prepare.addServlet(sds, null, entry.getConf());
+        }
     }
 
     public List<SncpServlet> getSncpServlets() {
diff --git a/src/org/redkale/util/DLong.java b/src/org/redkale/util/DLong.java
index 376ea3122..d3714f044 100644
--- a/src/org/redkale/util/DLong.java
+++ b/src/org/redkale/util/DLong.java
@@ -12,53 +12,53 @@ import java.util.*;
  * 16bytes数据结构
  * 注意： 为了提高性能， DLong中的bytes是直接返回， 不得对bytes的内容进行修改。
  *
- * <p> 详情见: http://www.redkale.org
+ * <p>
+ * 详情见: http://www.redkale.org
+ *
  * @author zhangjx
  */
 public final class DLong extends Number implements Comparable<DLong> {
 
     public static final DLong ZERO = new DLong(new byte[16]);
 
-    protected final byte[] bytes;
+    protected final byte[] value;
 
     protected DLong(long v1, long v2) {  //暂时不用
-        this.bytes = new byte[]{(byte) (v1 >> 56), (byte) (v1 >> 48), (byte) (v1 >> 40), (byte) (v1 >> 32),
+        this.value = new byte[]{(byte) (v1 >> 56), (byte) (v1 >> 48), (byte) (v1 >> 40), (byte) (v1 >> 32),
             (byte) (v1 >> 24), (byte) (v1 >> 16), (byte) (v1 >> 8), (byte) v1, (byte) (v2 >> 56), (byte) (v2 >> 48), (byte) (v2 >> 40), (byte) (v2 >> 32),
             (byte) (v2 >> 24), (byte) (v2 >> 16), (byte) (v2 >> 8), (byte) v2};
     }
 
     protected DLong(byte[] bytes) {
         if (bytes == null || bytes.length != 16) throw new NumberFormatException("Not 16 length bytes");
-        this.bytes = bytes;
+        this.value = bytes;
     }
 
     public byte[] getBytes() {
-        return Arrays.copyOf(bytes, bytes.length);
+        return Arrays.copyOf(value, value.length);
     }
 
     public byte[] directBytes() {
-        return bytes;
+        return value;
     }
 
     public static DLong create(byte[] bytes) {
-        if (ZERO.equals(bytes)) return ZERO;
         return new DLong(bytes);
     }
 
     public static DLong read(ByteBuffer buffer) {
         byte[] bs = new byte[16];
         buffer.get(bs);
-        if (ZERO.equals(bs)) return ZERO;
         return new DLong(bs);
     }
 
-    public static ByteBuffer write(ByteBuffer buffer, DLong value) {
-        buffer.put(value.bytes);
+    public static ByteBuffer write(ByteBuffer buffer, DLong dlong) {
+        buffer.put(dlong.value);
         return buffer;
     }
 
     public boolean equals(byte[] bytes) {
-        return Arrays.equals(this.bytes, bytes);
+        return Arrays.equals(this.value, bytes);
     }
 
     @Override
@@ -66,35 +66,35 @@ public final class DLong extends Number implements Comparable<DLong> {
         if (obj == null) return false;
         if (getClass() != obj.getClass()) return false;
         final DLong other = (DLong) obj;
-        return Arrays.equals(this.bytes, other.bytes);
+        return Arrays.equals(this.value, other.value);
     }
 
     @Override
     public int hashCode() {
-        return Arrays.hashCode(bytes);
+        return Arrays.hashCode(value);
     }
 
     @Override
     public String toString() {
         if (this == ZERO) return "0";
-        return new String(Utility.binToHex(bytes));
+        return new String(Utility.binToHex(value));
     }
 
     @Override
     public int intValue() {
-        return ((bytes[12] & 0xff) << 24) | ((bytes[113] & 0xff) << 16) | ((bytes[14] & 0xff) << 8) | (bytes[15] & 0xff);
+        return ((value[12] & 0xff) << 24) | ((value[113] & 0xff) << 16) | ((value[14] & 0xff) << 8) | (value[15] & 0xff);
     }
 
     @Override
     public long longValue() {
-        return ((((long) bytes[8] & 0xff) << 56)
-                | (((long) bytes[9] & 0xff) << 48)
-                | (((long) bytes[10] & 0xff) << 40)
-                | (((long) bytes[11] & 0xff) << 32)
-                | (((long) bytes[12] & 0xff) << 24)
-                | (((long) bytes[13] & 0xff) << 16)
-                | (((long) bytes[14] & 0xff) << 8)
-                | (((long) bytes[15] & 0xff)));
+        return ((((long) value[8] & 0xff) << 56)
+                | (((long) value[9] & 0xff) << 48)
+                | (((long) value[10] & 0xff) << 40)
+                | (((long) value[11] & 0xff) << 32)
+                | (((long) value[12] & 0xff) << 24)
+                | (((long) value[13] & 0xff) << 16)
+                | (((long) value[14] & 0xff) << 8)
+                | (((long) value[15] & 0xff)));
     }
 
     @Override
@@ -110,8 +110,8 @@ public final class DLong extends Number implements Comparable<DLong> {
     @Override
     public int compareTo(DLong o) {
         if (o == null) return 1;
-        for (int i = 0; i < bytes.length; i++) {
-            if (this.bytes[i] != o.bytes[i]) return this.bytes[i] - o.bytes[i];
+        for (int i = 0; i < value.length; i++) {
+            if (this.value[i] != o.value[i]) return this.value[i] - o.value[i];
         }
         return 0;
     }