FIX: Supervisord crushes on exceptions while adding process-group

Author: cod1k

supervisor/events.py

@@ -174,6 +174,15 @@ def payload(self):
 class ProcessGroupAddedEvent(ProcessGroupEvent):
     pass
 
+class AddProcessGroupFailedEvent(ProcessGroupEvent):
+    def __init__(self, group, err = None):
+        super().__init__(group)
+        self.err = err
+
+    def payload(self):
+        payload = super().payload()
+        return payload+'error:%s\n' % self.err
+
 class ProcessGroupRemovedEvent(ProcessGroupEvent):
     pass
 

supervisor/supervisord.py

@@ -114,7 +114,12 @@ def add_process_group(self, config):
         name = config.name
         if name not in self.process_groups:
             config.after_setuid()
-            self.process_groups[name] = config.make_group()
+            try:
+                self.process_groups[name] = config.make_group()
+            except BaseException as why:
+                self.options.logger.warn('Unable to add group %s: %s' % (name, why))
+                events.notify(events.AddProcessGroupFailedEvent(name, why))
+                return False
             events.notify(events.ProcessGroupAddedEvent(name))
             return True
         return False