Merge pull request #2453 from findhit/hotfix/mysql-connection-validate

dialects.mysql.connection-manager: Use `connection._protocol._ended` state on $validate

lib/dialects/mysql/connection-manager.js

@@ -74,7 +74,7 @@ ConnectionManager.prototype.disconnect = function(connection) {
   });
   });
 };
 };
 ConnectionManager.prototype.validate = function(connection) {
 ConnectionManager.prototype.validate = function(connection) {
-  return connection && connection.state !== 'disconnected';
+  return connection && ['disconnected', 'protocol_error'].indexOf(connection.state) !== -1;
 };
 };
 
 
 module.exports = ConnectionManager;
 module.exports = ConnectionManager;