diff --git a/lib/classes/task/appboxAbstract.class.php b/lib/classes/task/appboxAbstract.class.php
index d33fc86554..80344bea4c 100644
--- a/lib/classes/task/appboxAbstract.class.php
+++ b/lib/classes/task/appboxAbstract.class.php
@@ -38,8 +38,9 @@ abstract class task_appboxAbstract extends task_abstract
         $this->log(("Warning : abox connection lost, restarting in 10 min."));
         sleep(60 * 10);
         $this->running = false;
+        $this->return_value = self::RETURNSTATUS_TORESTART;
 
-        return('');
+        return;
       }
 
       $this->set_last_exec_time();
@@ -85,7 +86,7 @@ abstract class task_appboxAbstract extends task_abstract
       $this->pause($duration);
     }
 
-    return($this->return_value);
+    return;
   }
 
   /**
diff --git a/lib/classes/task/databoxAbstract.class.php b/lib/classes/task/databoxAbstract.class.php
index f0559140d0..6049b7a48b 100644
--- a/lib/classes/task/databoxAbstract.class.php
+++ b/lib/classes/task/databoxAbstract.class.php
@@ -46,8 +46,9 @@ abstract class task_databoxAbstract extends task_abstract
         $this->log(("Warning : abox connection lost, restarting in 10 min."));
         sleep(60 * 10);
         $this->running = false;
+        $this->return_value = self::RETURNSTATUS_TORESTART;
 
-        return('');
+        return;
       }
 
       $this->set_last_exec_time();
@@ -104,7 +105,7 @@ abstract class task_databoxAbstract extends task_abstract
       $this->pause($duration);
     }
 
-    return($this->return_value);
+    return;
   }
 
   /**
diff --git a/lib/vendor/symfony b/lib/vendor/symfony
index 6924e63587..4316595dbb 160000
--- a/lib/vendor/symfony
+++ b/lib/vendor/symfony
@@ -1 +1 @@
-Subproject commit 6924e63587466c865ca8dc746ff3fcf5cd1a1dcf
+Subproject commit 4316595dbb7be9dcf2156d090d52f23f11b1ea90