diff --git a/source/src/main/java/io/mycat/mycat2/MySQLSession.java b/source/src/main/java/io/mycat/mycat2/MySQLSession.java
index 0ab24d5..9064032 100644
--- a/source/src/main/java/io/mycat/mycat2/MySQLSession.java
+++ b/source/src/main/java/io/mycat/mycat2/MySQLSession.java
@@ -9,6 +9,7 @@
 import io.mycat.mycat2.beans.MySQLMetaBean;
 import io.mycat.mycat2.cmds.pkgread.PkgFirstReader;
 import io.mycat.mycat2.cmds.pkgread.PkgProcess;
+import io.mycat.mycat2.console.SessionKeyEnum;
 import io.mycat.proxy.BufferPool;
 
 /**
@@ -53,7 +54,12 @@ public void bind2MycatSession(MycatSession mycatSession) {
 	public void unbindMycatSession() {
 		this.useSharedBuffer(null);
 		this.setCurBufOwner(true); //设置后端连接 获取buffer 控制权
+		if(this.mycatSession != null) {
+			this.mycatSession.clearBeckend(this);
+		}
 		this.mycatSession = null;
+
+		this.getSessionAttrMap().remove(SessionKeyEnum.SESSION_KEY_CONN_IDLE_FLAG.getKey());
 	}
 	
 	@Override
@@ -90,7 +96,7 @@ public void setMySQLMetaBean(MySQLMetaBean metaBean) {
 
 	@Override
 	public String toString() {
-		return "MySQLSession [database=" + database + ", ip=" + mysqlMetaBean.getDsMetaBean().getIp() + ",port=" + mysqlMetaBean.getDsMetaBean().getPort() + "]";
+		return "MySQLSession [database=" + database + ", ip=" + mysqlMetaBean.getDsMetaBean().getIp()  + ",port="+ mysqlMetaBean.getDsMetaBean().getPort()+ ",hashCode="+hashCode()+"]";
 	}
 
 }
diff --git a/source/src/main/java/io/mycat/mycat2/MycatSession.java b/source/src/main/java/io/mycat/mycat2/MycatSession.java
index 8af2ff8..fa51694 100644
--- a/source/src/main/java/io/mycat/mycat2/MycatSession.java
+++ b/source/src/main/java/io/mycat/mycat2/MycatSession.java
@@ -202,6 +202,7 @@ public void bindBackend(MySQLSession backend) {
 		backend.setMycatSession(this);
 		backend.useSharedBuffer(this.proxyBuffer);
 		backend.setCurNIOHandler(this.getCurNIOHandler());
+		backend.getSessionAttrMap().put(SessionKeyEnum.SESSION_KEY_CONN_IDLE_FLAG.getKey(), false);
 	}
 
 	/**
@@ -212,6 +213,11 @@ public void unbindAllBackend() {
 		backendMap.forEach((key, value) -> {
 			if (value != null) {
 				value.forEach(mySQLSession -> {
+					/*需要将前端的mycatSession设置为空 不然还会被使用*/
+					MycatSession mycatSession = mySQLSession.getMycatSession();
+					if(null != mycatSession) {
+						mycatSession.curBackend = null;
+					}
 					mySQLSession.unbindMycatSession();
 					reactor.addMySQLSession(mySQLSession.getMySQLMetaBean(), mySQLSession);
 				});
@@ -226,11 +232,14 @@ public void unbindBeckend(MySQLSession mysqlSession){
 			mysqlSession.unbindMycatSession();
 			list.remove(mysqlSession);
 		}
+		clearBeckend(mysqlSession);
+	}
+	
+	public void clearBeckend(MySQLSession mysqlSession){
 		if(curBackend!=null&&curBackend.equals(mysqlSession)){
 			curBackend = null;
 		}
 	}
-	
 	/**
 	 * 解除绑定当前 metaBean 所有的后端连接
 	 * @param mySQLMetaBean
diff --git a/source/src/main/java/io/mycat/proxy/ProxyBuffer.java b/source/src/main/java/io/mycat/proxy/ProxyBuffer.java
index 3c6391d..e43fc6c 100644
--- a/source/src/main/java/io/mycat/proxy/ProxyBuffer.java
+++ b/source/src/main/java/io/mycat/proxy/ProxyBuffer.java
@@ -1,6 +1,5 @@
 package io.mycat.proxy;
 
-import java.io.UnsupportedEncodingException;
 import java.nio.ByteBuffer;
 
 import org.slf4j.Logger;
@@ -414,7 +413,7 @@ public byte[] getLenencBytes(int index) {
 	 *            值
 	 * @return 长度
 	 */
-	public int getLenencLength(int lenenc) {
+	public static int getLenencLength(int lenenc) {
 		if (lenenc < 251) {
 			return 1;
 		} else if (lenenc >= 251 && lenenc < (1 << 16)) {
@@ -426,6 +425,7 @@ public int getLenencLength(int lenenc) {
 		}
 	}
 
+	
 	public long getLenencInt(int index) {
 		long len = getInt(index, 1) & 0xff;
 		if (len == 0xfc) {