Don't reconnect to IGNORED hosts when marked down

CHANGELOG.rst

@@ -45,6 +45,9 @@ Bug Fixes
   contact points (PYTHON-90)
 * Make Murmur3 hash match Cassandra's hash for all values (PYTHON-89,
   github #147)
+* Don't attempt to reconnect to hosts that should be ignored (according
+  to the load balancing policy) when a notification is received that the
+  host is down.
 
 2.0.2
 =====

cassandra/cluster.py

@@ -772,6 +772,9 @@ class Cluster(object):
         return futures
 
     def _start_reconnector(self, host, is_host_addition):
+        if self.load_balancing_policy.distance(host) == HostDistance.IGNORED:
+            return
+
         schedule = self.reconnection_policy.new_schedule()
 
         # in order to not hold references to this Cluster open and prevent

tests/integration/long/test_loadbalancingpolicies.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 import struct
+import time
 from cassandra import ConsistencyLevel, Unavailable
 from cassandra.cluster import Cluster, NoHostAvailable
 from cassandra.concurrent import execute_concurrent_with_args
@@ -469,9 +470,14 @@ class LoadBalancingPolicyTests(unittest.TestCase):
         self.coordinator_stats.assert_query_count_equals(self, 2, 12)
         self.coordinator_stats.assert_query_count_equals(self, 3, 0)
 
+        # white list policy should not allow reconnecting to ignored hosts
+        force_stop(3)
+        wait_for_down(cluster, 3)
+        self.assertFalse(cluster.metadata._hosts[IP_FORMAT % 3].is_currently_reconnecting())
+
         self.coordinator_stats.reset_counts()
-        decommission(2)
-        wait_for_down(cluster, 2, wait=True)
+        force_stop(2)
+        time.sleep(10)
 
         try:
             self._query(session, keyspace)