fix check_active_list

lib/tasks/miners.rake

@@ -26,17 +26,22 @@ namespace :miners do
     message.send_with(bot)
   end
 
-
   task check_active_list: :environment do
     url = 'http://144.202.99.58:4243/active_list'
-    response = HTTParty.get(url)
+    response_json = []
 
+    begin
+      response = HTTParty.get(url)
       response_json = JSON.parse(response.body)
+    rescue => e
+      puts e
+    end
     time = DateTime.now
     miners = Miner.all
 
     if response_json == []
       miners.update_all(status: Miner::STATUSES[0])
+      return
     end
 
     miners.each do |miner|