Avoid divide-by-zero when all hosts are down

2013-05-02 17:36:29 -05:00
parent e6167d2cab
commit bd26be15f0
1 changed files with 5 additions and 2 deletions
--- a/cassandra/policies.py
+++ b/cassandra/policies.py
@@ -40,8 +40,11 @@ class RoundRobinPolicy(LoadBalancingPolicy):
            self._position += 1

        length = len(self._live_hosts)
-        pos %= length
-        return islice(cycle(self._live_hosts), pos, pos + length)
+        if length:
+            pos %= length
+            return islice(cycle(self._live_hosts), pos, pos + length)
+        else:
+            return []

    def on_up(self, host):
        self._live_hosts.add(host)