diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index ca67fbbf5..9edf94699 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -3540,6 +3540,21 @@ int SrsConfig::check_config()
 {
     int ret = ERROR_SUCCESS;
     
+    if ((ret = check_normal_config()) != ERROR_SUCCESS) {
+        return ret;
+    }
+    
+    if ((ret = check_number_connections()) != ERROR_SUCCESS) {
+        return ret;
+    }
+    
+    return ret;
+}
+
+int SrsConfig::check_normal_config()
+{
+    int ret = ERROR_SUCCESS;
+    
     srs_trace("srs checking config...");
     
     ////////////////////////////////////////////////////////////////////////
@@ -3659,51 +3674,6 @@ int SrsConfig::check_config()
         }
     }
     
-    ////////////////////////////////////////////////////////////////////////
-    // check max connections
-    ////////////////////////////////////////////////////////////////////////
-    if (get_max_connections() <= 0) {
-        ret = ERROR_SYSTEM_CONFIG_INVALID;
-        srs_error("directive max_connections invalid, max_connections=%d, ret=%d", get_max_connections(), ret);
-        return ret;
-    }
-    
-    // check max connections of system limits
-    if (true) {
-        int nb_consumed_fds = (int)get_listens().size();
-        if (!get_http_api_listen().empty()) {
-            nb_consumed_fds++;
-        }
-        if (!get_http_stream_listen().empty()) {
-            nb_consumed_fds++;
-        }
-        if (get_log_tank_file()) {
-            nb_consumed_fds++;
-        }
-        // 0, 1, 2 for stdin, stdout and stderr.
-        nb_consumed_fds += 3;
-        
-        int nb_connections = get_max_connections();
-        int nb_total = nb_connections + nb_consumed_fds;
-        
-        int max_open_files = (int)sysconf(_SC_OPEN_MAX);
-        int nb_canbe = max_open_files - nb_consumed_fds - 1;
-        
-        // for each play connections, we open a pipe(2fds) to convert SrsConsumver to io,
-        // refine performance, @see: https://github.com/ossrs/srs/issues/194
-        if (nb_total >= max_open_files) {
-            ret = ERROR_SYSTEM_CONFIG_INVALID;
-            srs_error("invalid max_connections=%d, required=%d, system limit to %d, "
-                      "total=%d(max_connections=%d, nb_consumed_fds=%d), ret=%d. "
-                      "you can change max_connections from %d to %d, or "
-                      "you can login as root and set the limit: ulimit -HSn %d",
-                      nb_connections, nb_total + 100, max_open_files,
-                      nb_total, nb_connections, nb_consumed_fds,
-                      ret, nb_connections, nb_canbe, nb_total + 100);
-            return ret;
-        }
-    }
-    
     ////////////////////////////////////////////////////////////////////////
     // check heartbeat
     ////////////////////////////////////////////////////////////////////////
@@ -4097,6 +4067,58 @@ int SrsConfig::check_config()
     return ret;
 }
 
+int SrsConfig::check_number_connections()
+{
+    int ret = ERROR_SUCCESS;
+    
+    ////////////////////////////////////////////////////////////////////////
+    // check max connections
+    ////////////////////////////////////////////////////////////////////////
+    if (get_max_connections() <= 0) {
+        ret = ERROR_SYSTEM_CONFIG_INVALID;
+        srs_error("directive max_connections invalid, max_connections=%d, ret=%d", get_max_connections(), ret);
+        return ret;
+    }
+    
+    // check max connections of system limits
+    if (true) {
+        int nb_consumed_fds = (int)get_listens().size();
+        if (!get_http_api_listen().empty()) {
+            nb_consumed_fds++;
+        }
+        if (!get_http_stream_listen().empty()) {
+            nb_consumed_fds++;
+        }
+        if (get_log_tank_file()) {
+            nb_consumed_fds++;
+        }
+        // 0, 1, 2 for stdin, stdout and stderr.
+        nb_consumed_fds += 3;
+        
+        int nb_connections = get_max_connections();
+        int nb_total = nb_connections + nb_consumed_fds;
+        
+        int max_open_files = (int)sysconf(_SC_OPEN_MAX);
+        int nb_canbe = max_open_files - nb_consumed_fds - 1;
+        
+        // for each play connections, we open a pipe(2fds) to convert SrsConsumver to io,
+        // refine performance, @see: https://github.com/ossrs/srs/issues/194
+        if (nb_total >= max_open_files) {
+            ret = ERROR_SYSTEM_CONFIG_INVALID;
+            srs_error("invalid max_connections=%d, required=%d, system limit to %d, "
+                      "total=%d(max_connections=%d, nb_consumed_fds=%d), ret=%d. "
+                      "you can change max_connections from %d to %d, or "
+                      "you can login as root and set the limit: ulimit -HSn %d",
+                      nb_connections, nb_total + 100, max_open_files,
+                      nb_total, nb_connections, nb_consumed_fds,
+                      ret, nb_connections, nb_canbe, nb_total + 100);
+            return ret;
+        }
+    }
+    
+    return ret;
+}
+
 int SrsConfig::parse_buffer(SrsConfigBuffer* buffer)
 {
     int ret = ERROR_SUCCESS;
diff --git a/trunk/src/app/srs_app_config.hpp b/trunk/src/app/srs_app_config.hpp
index 29246d7e7..3ac315362 100644
--- a/trunk/src/app/srs_app_config.hpp
+++ b/trunk/src/app/srs_app_config.hpp
@@ -544,6 +544,9 @@ public:
      * check the parsed config.
      */
     virtual int check_config();
+protected:
+    virtual int check_normal_config();
+    virtual int check_number_connections();
 protected:
     /**
      * parse config from the buffer.
diff --git a/trunk/src/utest/srs_utest_config.cpp b/trunk/src/utest/srs_utest_config.cpp
index 3208a81c9..d15b95035 100644
--- a/trunk/src/utest/srs_utest_config.cpp
+++ b/trunk/src/utest/srs_utest_config.cpp
@@ -78,7 +78,7 @@ int MockSrsConfig::parse(string buf)
         return ret;
     }
 
-    return check_config();
+    return check_normal_config();
 }
 
 #ifdef ENABLE_UTEST_CONFIG
@@ -829,39 +829,6 @@ VOID TEST(ConfigMainTest, CheckConf_srs_log_file)
     }
 }
 
-VOID TEST(ConfigMainTest, CheckConf_max_connections)
-{
-    if (true) {
-        MockSrsConfig conf;
-        EXPECT_TRUE(ERROR_SUCCESS == conf.parse(_MIN_OK_CONF"max_connections 1000;"));
-    }
-    
-    if (true) {
-        MockSrsConfig conf;
-        EXPECT_TRUE(ERROR_SUCCESS != conf.parse(_MIN_OK_CONF"max_connectionss 1000;"));
-    }
-    
-    if (true) {
-        MockSrsConfig conf;
-        EXPECT_TRUE(ERROR_SUCCESS != conf.parse(_MIN_OK_CONF"max_connections 0;"));
-    }
-    
-    if (true) {
-        MockSrsConfig conf;
-        EXPECT_TRUE(ERROR_SUCCESS != conf.parse(_MIN_OK_CONF"max_connections 1000000;"));
-    }
-    
-    if (true) {
-        MockSrsConfig conf;
-        EXPECT_TRUE(ERROR_SUCCESS != conf.parse(_MIN_OK_CONF"max_connections -1;"));
-    }
-    
-    if (true) {
-        MockSrsConfig conf;
-        EXPECT_TRUE(ERROR_SUCCESS != conf.parse(_MIN_OK_CONF"max_connections -1024;"));
-    }
-}
-
 VOID TEST(ConfigMainTest, CheckConf_daemon)
 {
     if (true) {