diff --git a/db/HGPdtToolDb/HGPdtToolDb.h b/db/HGPdtToolDb/HGPdtToolDb.h
index cb2f524..9d01c0f 100644
--- a/db/HGPdtToolDb/HGPdtToolDb.h
+++ b/db/HGPdtToolDb/HGPdtToolDb.h
@@ -7,10 +7,12 @@
 
 /* 账户在其他地方登录 */
 #define HGPDTTOOLDB_USEREVENT_CONFLICT			1L
-/* 网络连接断开 */
-#define HGPDTTOOLDB_USEREVENT_DISCONNECT		2L
+/* 网络错误 */
+#define HGPDTTOOLDB_USEREVENT_NETERROR			2L
 /* 被管理员账户强制下线 */
 #define HGPDTTOOLDB_USEREVENT_REFUSE			3L
+/* 数据库异常 */
+#define HGPDTTOOLDB_USEREVENT_DBERROR			4L
 
 /* 管理员账户 */
 #define HGPDTTOOLDB_USERTYPE_ROOT				1L
diff --git a/db/HGPdtToolDb/HGPdtToolDbImpl.cpp b/db/HGPdtToolDb/HGPdtToolDbImpl.cpp
index cd5cc83..f6c778b 100644
--- a/db/HGPdtToolDb/HGPdtToolDbImpl.cpp
+++ b/db/HGPdtToolDb/HGPdtToolDbImpl.cpp
@@ -998,18 +998,19 @@ void HGAPI HGPdtToolDbUserMgrImpl::ThreadFunc(HGThread thread, HGPointer param)
 	{
 		HGUInt event = 0;
 
-		int connectId;
+		int connectId = -1;
 		std::string takeUserName;
-		bool ret = GetUserLoginInfo(p->m_sql, p->m_userName.c_str(), connectId, takeUserName);
-		if (!ret)
+		int ret = GetUserLoginInfo(p->m_sql, p->m_userName.c_str(), connectId, takeUserName);
+		if (0 != ret)
 		{
-			event = HGPDTTOOLDB_USEREVENT_DISCONNECT;
+			int errNo = mysql_errno(p->m_sql);
+			event = (errNo >= 1158 && errNo <= 1161) ? HGPDTTOOLDB_USEREVENT_NETERROR : HGPDTTOOLDB_USEREVENT_DBERROR;
 		}
-		else if (takeUserName == "root" && p->m_userName != takeUserName)
+		else if (takeUserName == "root" && takeUserName != p->m_userName)
 		{
 			event = HGPDTTOOLDB_USEREVENT_REFUSE;
 		}
-		else if (connectId != p->m_connectId)
+		else if (connectId != -1 && connectId != p->m_connectId)
 		{
 			event = HGPDTTOOLDB_USEREVENT_CONFLICT;
 		}
@@ -1142,7 +1143,7 @@ bool HGPdtToolDbUserMgrImpl::SetUserLoginInfo(MYSQL* sql, const HGChar* userName
 	return (0 == ret) ? true : false;
 }
 
-bool HGPdtToolDbUserMgrImpl::GetUserLoginInfo(MYSQL* sql, const HGChar* userName, int& connectId, std::string& takeUserName)
+int HGPdtToolDbUserMgrImpl::GetUserLoginInfo(MYSQL* sql, const HGChar* userName, int& connectId, std::string& takeUserName)
 {
 	assert(NULL != sql);
 	assert(NULL != userName && 0 != *userName);
@@ -1154,7 +1155,7 @@ bool HGPdtToolDbUserMgrImpl::GetUserLoginInfo(MYSQL* sql, const HGChar* userName
 	int ret = mysql_query(sql, sqlCmd);
 	if (0 != ret)
 	{
-		return false;
+		return ret;
 	}
 
 	MYSQL_RES* sqlRes = mysql_use_result(sql);
@@ -1171,7 +1172,7 @@ bool HGPdtToolDbUserMgrImpl::GetUserLoginInfo(MYSQL* sql, const HGChar* userName
 		mysql_free_result(sqlRes);
 	}
 
-	return true;
+	return 0;
 }
 
 int HGPdtToolDbUserMgrImpl::CreateFileTable(MYSQL* sql)
diff --git a/db/HGPdtToolDb/HGPdtToolDbImpl.hpp b/db/HGPdtToolDb/HGPdtToolDbImpl.hpp
index 66e2eda..dedf7fb 100644
--- a/db/HGPdtToolDb/HGPdtToolDbImpl.hpp
+++ b/db/HGPdtToolDb/HGPdtToolDbImpl.hpp
@@ -46,7 +46,7 @@ private:
 	static std::string GetAuthString(MYSQL* sql, const HGChar* pwd);
 	static int GetConnectId(MYSQL* sql);
 	static bool SetUserLoginInfo(MYSQL* sql, const HGChar* userName, int connectId, const std::string& takeUserName);
-	static bool GetUserLoginInfo(MYSQL* sql, const HGChar* userName, int &connectId, std::string &takeUserName);
+	static int GetUserLoginInfo(MYSQL* sql, const HGChar* userName, int &connectId, std::string &takeUserName);
 
 	int CreateFileTable(MYSQL* sql);
 	int CreateMainTestTable(MYSQL *sql);