Use a django settings module, if defined, even if it wasn't already loaded by Django (for example, when using ./celeryd directly rather than the celeryd management command.

celery/loaders/__init__.py

@@ -14,24 +14,32 @@ Loader = DefaultLoader
 if settings.configured:
     Loader = DjangoLoader
 else:
-    if not callable(getattr(os, "fork", None)):
-        # Platform doesn't support fork()
-        # XXX On systems without fork, multiprocessing seems to be launching
-        # the processes in some other way which does not copy the memory
-        # of the parent process. This means that any configured env might
-        # be lost. This is a hack to make it work on Windows.
-        # A better way might be to use os.environ to set the currently
-        # used configuration method so to propogate it to the "child"
-        # processes. But this has to be experimented with.
-        # [asksol/heyman]
-        try:
-            settings_mod = os.environ.get("DJANGO_SETTINGS_MODULE",
-                                          "settings")
-            project_settings = __import__(settings_mod, {}, {}, [''])
-            setup_environ(project_settings)
-            Loader = DjangoLoader
-        except ImportError:
-            pass
+    try:
+        # A settings module may be defined, but Django didn't attempt to 
+        # load it yet. As an alternative to calling the private _setup(),
+        # we could also check whether DJANGO_SETTINGS_MODULE is set.
+        settings._setup() 
+    except ImportError:
+        if not callable(getattr(os, "fork", None)):
+            # Platform doesn't support fork()
+            # XXX On systems without fork, multiprocessing seems to be launching
+            # the processes in some other way which does not copy the memory
+            # of the parent process. This means that any configured env might
+            # be lost. This is a hack to make it work on Windows.
+            # A better way might be to use os.environ to set the currently
+            # used configuration method so to propogate it to the "child"
+            # processes. But this has to be experimented with.
+            # [asksol/heyman]
+            try:
+                settings_mod = os.environ.get("DJANGO_SETTINGS_MODULE",
+                                              "settings")
+                project_settings = __import__(settings_mod, {}, {}, [''])
+                setup_environ(project_settings)
+                Loader = DjangoLoader
+            except ImportError:
+                pass
+    else:
+        Loader = DjangoLoader
 
 """
 .. data:: current_loader