From 0546616926d7f95017405b4abb532a4517db7d90 Mon Sep 17 00:00:00 2001
From: Sateesh Chodapuneedi <sateesh.chodapuneedi@citrix.com>
Date: Wed, 28 Sep 2011 18:07:22 +0530
Subject: bug 861310

Check if host list is not empty before trying to weigh the hosts.

Change-Id: I4014bf64951963088cdfaad1210fa9d23e7cc08b
---
 nova/scheduler/base_scheduler.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/nova/scheduler/base_scheduler.py b/nova/scheduler/base_scheduler.py
index e8629ca92..132b8a493 100644
--- a/nova/scheduler/base_scheduler.py
+++ b/nova/scheduler/base_scheduler.py
@@ -56,6 +56,9 @@ class BaseScheduler(abstract_scheduler.AbstractScheduler):
         """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]
-- 
cgit