bug 861310

Check if host list is not empty before trying to weigh the hosts. Change-Id: I4014bf64951963088cdfaad1210fa9d23e7cc08b
openstack · Sep 29, 2011 · 0546616 · 0546616
1 parent ef22c00
commit 0546616
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/nova/scheduler/base_scheduler.py b/nova/scheduler/base_scheduler.py
@@ -56,6 +56,9 @@ def weigh_hosts(self, topic, request_spec, hosts):
         """Derived classes may override this to provide more sophisticated
         scheduling objectives
         """
+        # Make sure if there are compute hosts to serve the request.
+        if not hosts:
+            return []
         # NOTE(sirp): The default logic is the same as the NoopCostFunction
         hosts = [dict(weight=1, hostname=hostname, capabilities=capabilities)
                  for hostname, capabilities in hosts]