diff --git a/HttpServer/Shutdown.php b/HttpServer/Shutdown.php
index b6608d39..7e2d1742 100644
--- a/HttpServer/Shutdown.php
+++ b/HttpServer/Shutdown.php
@@ -86,6 +86,7 @@ class Shutdown extends Component
         }
         $shell = 'ps -eo pid,cmd,state | grep %d | grep -v grep';
         exec(sprintf($shell, $content), $output, $code);
+        var_dump(sprintf($shell, $content), $output, $code);
         if (empty($output)) {
             return false;
         }