Fix for bug #714

Fix for bug #714

server/core/dcb.c

@@ -697,6 +697,12 @@ int             rc;
          * Successfully connected to backend. Assign file descriptor to dcb
          */
         dcb->fd = fd;
+
+	/**
+	 * Add server pointer to dcb
+	 */
+        dcb->server = server;
+
         /** Copy status field to DCB */
         dcb->dcb_server_status = server->status;
         ss_debug(dcb->dcb_port = server->port;)
@@ -723,7 +729,7 @@ int             rc;
 	 */
 	atomic_add(&server->stats.n_connections, 1);
 	atomic_add(&server->stats.n_current, 1);
-        
+
 	return dcb;
 }
 

server/include/dcb.h

@@ -264,6 +264,7 @@ typedef struct dcb {
 
 	unsigned int	high_water;	/**< High water mark */
 	unsigned int	low_water;	/**< Low water mark */
+	struct server	*server;	/**< The associated backend server */
 #if defined(SS_DEBUG)
         int             dcb_port;       /**< port of target server */
         skygw_chk_t     dcb_chk_tail;

server/modules/protocol/mysql_common.c

@@ -220,6 +220,18 @@ int gw_read_backend_handshake(
                                         "from backend. Error code: %d, Msg : %s",
                                         errcode,
                                         bufstr)));
+
+				if (errcode == 1129) {
+                                	LOGIF(LE, (skygw_log_write_flush(
+                                     	   LOGFILE_ERROR,
+                                      	  "Server %s has been put into maintenance mode due to the server blocking connections from MaxScale. Run 'mysqladmin -h %s -P %d flush-hosts' on this server before taking this server out of maintenance mode.",
+					  dcb->server->unique_name,
+                                       	  dcb->server->name,
+					  dcb->server->port)));
+
+					server_set_status(dcb->server, SERVER_MAINT);
+
+				}
                                 
                                 free(bufstr);
                         }