diff --git a/README.md b/README.md
index 04aca9b..7b7868c 100644
--- a/README.md
+++ b/README.md
@@ -1062,7 +1062,7 @@ func (slf *TestTcpService) OnRequest (clientid uint64,msg proto.Message){
 提交bug及特性: https://github.com/duanhf2012/origin/issues
 
 [因服务器是由个人维护，如果这个项目对您有帮助，您可以点我进行捐赠，感谢！](http://www.cppblog.com/images/cppblog_com/API/21416/r_pay.jpg "Thanks!")
-
+![](http://www.cppblog.com/images/cppblog_com/API/21416/r_pay.jpg)
 特别感谢以下赞助网友：
 
 ```
@@ -1071,4 +1071,5 @@ _
 死磕代码
 bp-li
 阿正
+大头
 ```
diff --git a/cluster/cluster.go b/cluster/cluster.go
index c2daaa7..797ddea 100644
--- a/cluster/cluster.go
+++ b/cluster/cluster.go
@@ -477,3 +477,14 @@ func (cls *Cluster) GetGlobalCfg() interface{} {
 	return cls.globalCfg
 }
 
+func (cls *Cluster) GetNodeInfo(nodeId int) (NodeInfo,bool) {
+	cls.locker.RLock()
+	defer cls.locker.RUnlock()
+
+	nodeInfo,ok:= cls.mapRpc[nodeId]
+	if ok == false || nodeInfo == nil {
+		return NodeInfo{},false
+	}
+
+	return nodeInfo.nodeInfo,true
+}
diff --git a/concurrent/concurrent.go b/concurrent/concurrent.go
index 6b97059..702c020 100644
--- a/concurrent/concurrent.go
+++ b/concurrent/concurrent.go
@@ -5,6 +5,7 @@ import (
 	"runtime"
 
 	"github.com/duanhf2012/origin/log"
+	"sync/atomic"
 )
 
 const defaultMaxTaskChannelNum = 1000000
@@ -21,6 +22,7 @@ type Concurrent struct {
 
 	tasks     chan task
 	cbChannel chan func(error)
+	open int32
 }
 
 /*
@@ -33,6 +35,10 @@ func (c *Concurrent) OpenConcurrentByNumCPU(cpuNumMul float32) {
 }
 
 func (c *Concurrent) OpenConcurrent(minGoroutineNum int32, maxGoroutineNum int32, maxTaskChannelNum int) {
+	if atomic.AddInt32(&c.open,1) > 1 {
+		panic("repeated calls to OpenConcurrent are not allowed!")
+	}
+	
 	c.tasks = make(chan task, maxTaskChannelNum)
 	c.cbChannel = make(chan func(error), maxTaskChannelNum)