From 9e68ea91edbb475a72e24f1b8abcfae78e398186 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Honza=20Kr=C3=A1l?= <honza.kral@gmail.com>
Date: Sun, 3 Nov 2013 22:38:30 +0100
Subject: [PATCH] If we have sniffed no hosts, consider our sniff failed

---
 elasticsearch/transport.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/elasticsearch/transport.py b/elasticsearch/transport.py
index 6fea4bdd..21c77ea2 100644
--- a/elasticsearch/transport.py
+++ b/elasticsearch/transport.py
@@ -174,6 +174,11 @@ class Transport(object):
             if host is not None:
                 hosts.append(host)
 
+        # we weren't able to get any nodes, maybe using an incompatible
+        # transport_schema or host_info_callback blocked all - raise error.
+        if not hosts:
+            raise TransportError("Enable to sniff hosts - no viable hosts found.")
+
         self.set_connections(hosts)
 
     def mark_dead(self, connection):