From afa283cd2dec015dd0aa4280e55b5a6b12bb4dc2 Mon Sep 17 00:00:00 2001
From: Andrew Resch <andrewresch@gmail.com>
Date: Thu, 8 Apr 2010 17:16:28 -0700
Subject: [PATCH] Add an errback for when calling a component's start() fails
 and revert it back to a Stopped state in this case

---
 deluge/component.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/deluge/component.py b/deluge/component.py
index 9ca34a14e..a516fd95e 100644
--- a/deluge/component.py
+++ b/deluge/component.py
@@ -108,11 +108,18 @@ class Component(object):
             self._component_start_timer()
             return True
 
+        def on_start_fail(result):
+            self._component_state = "Stopped"
+            self._component_starting_deferred = None
+            log.error(result)
+            return result
+
         if self._component_state == "Stopped":
             if hasattr(self, "start"):
                 self._component_state = "Starting"
                 d = maybeDeferred(self.start)
                 d.addCallback(on_start)
+                d.addErrback(on_start_fail)
                 self._component_starting_deferred = d
             else:
                 d = maybeDeferred(on_start, None)