$redis.client -> $redis._client.

See c239abb43c

config/unicorn.conf.rb

@@ -195,7 +195,7 @@ before_fork do |server, worker|
               sleep 10
               force_kill_rogue_sidekiq
             end
-            $redis.client.disconnect
+            $redis._client.disconnect
           end
         end
 
@@ -211,7 +211,7 @@ before_fork do |server, worker|
   end
 
   ActiveRecord::Base.connection.disconnect!
-  $redis.client.disconnect
+  $redis._client.disconnect
 
   # Throttle the master from forking too quickly by sleeping.  Due
   # to the implementation of standard Unix signal handlers, this

lib/discourse.rb

@@ -432,7 +432,7 @@ module Discourse
     RailsMultisite::ConnectionManagement.establish_connection(db: current_db)
     MessageBus.after_fork
     SiteSetting.after_fork
-    $redis.client.reconnect
+    $redis._client.reconnect
     Rails.cache.reconnect
     Logster.store.redis.reconnect
     # shuts down all connections in the pool

lib/discourse_redis.rb

@@ -229,7 +229,7 @@ class DiscourseRedis
   end
 
   def reconnect
-    @redis.client.reconnect
+    @redis._client.reconnect
   end
 
   def namespace_key(key)