Sentinel: Be more resilient when trying to connect to sentinels

Author: zmack

lib/redis/client.rb

@@ -461,7 +461,9 @@ def _parse_driver(driver)
     end
 
     class Connector
+      attr_reader :logger
       def initialize(options)
+        @logger = options[:logger]
         @options = options
       end
 
@@ -523,6 +525,11 @@ def sentinel_detect
 
                 return result
               end
+            rescue CannotConnectError
+              if logger
+                msg = "[Redis] Could not connect to sentinel #{sentinel[:host]}:#{sentinel[:port]}"
+                logger.debug(msg)
+              end
             ensure
               client.disconnect
             end