Kraken\Runtime\RuntimeContainerInterface::isFailed PHP Method

    public function isFailed();

 /**
  * @param RuntimeContainerInterface $runtime
  * @param ChannelCompositeInterface $composite
  * @param ProtocolInterface $protocol
  */
 private function executeProtocol(RuntimeContainerInterface $runtime, ChannelCompositeInterface $composite, ProtocolInterface $protocol)
 {
     /**
      * If the json_decode fails, it means the received message is leftover of request response,
      * hence it should be dropped.
      */
     try {
         $params = json_decode($protocol->getMessage(), true);
         $command = array_shift($params);
         $params['origin'] = $protocol->getOrigin();
         if (!$runtime->isFailed() || isset($params['hash']) && $runtime->getHash() === $params['hash']) {
             $promise = $this->executeCommand($command, $params);
         } else {
             $promise = Promise::doReject(new RejectionException('Container is currently in failed state and cannot execute any tasks.'));
         }
         if ($protocol->getType() === Channel::TYPE_REQ) {
             $promise->then(function ($response) use($composite, $protocol, $command) {
                 return (new Response($composite, $protocol, $response))->call();
             }, function ($reason) use($composite, $protocol) {
                 return (new Response($composite, $protocol, $reason))->call();
             }, function ($reason) use($composite, $protocol) {
                 return (new Response($composite, $protocol, $reason))->call();
             });
         }
     } catch (Error $ex) {
         return;
     } catch (Exception $ex) {
         return;
     }
 }