correct multisite issues with scheduler

config/initializers/100-sidekiq.rb

@@ -25,7 +25,7 @@ if Sidekiq.server?
 
     if !scheduler_hostname || scheduler_hostname.split(',').include?(`hostname`.strip)
       require 'scheduler/scheduler'
-      manager = Scheduler::Manager.new
+      manager = Scheduler::Manager.new($redis.without_namespace)
       Scheduler::Manager.discover_schedules.each do |schedule|
         manager.ensure_schedule!(schedule)
       end

lib/scheduler/manager.rb

@@ -106,12 +106,17 @@ module Scheduler
         info.prev_result = failed ? "FAILED" : "OK"
         info.current_owner = nil
         if stat
+          begin
+            RailsMultisite::ConnectionManagement.establish_connection(db: "default")
             stat.update!(
               duration_ms: duration,
               live_slots_finish: GC.stat[:heap_live_slots],
               success: !failed,
               error: error
             )
+          ensure
+            ActiveRecord::Base.connection_handler.clear_active_connections!
+          end
         end
         attempts(3) do
           @mutex.synchronize { info.write! }

lib/scheduler/schedule_info.rb

@@ -12,7 +12,7 @@ module Scheduler
 
       data = nil
 
-      if data = $redis.get(key)
+      if data = @manager.redis.get(key)
         data = JSON.parse(data)
       end
 
@@ -100,7 +100,7 @@ module Scheduler
         current_owner: @current_owner
       }.to_json
 
-      redis.zadd queue_key, @next_run , @klass if @next_run
+      redis.zadd queue_key, @next_run, @klass if @next_run
     end
 
     def del!