我只是跑了一圈 docker-compose build 在我最新的docker容器上，我注意到sidekiq正在重复生成以下行：

sidekiq_1   | `Redis#exists(key)` will return an Integer in redis-rb 4.3. `exists?` returns a boolean, you should use it instead. To opt-in to the new behavior now you can set Redis.exists_returns_integer =  true. To disable this message and keep the current (boolean) behaviour of 'exists' you can set `Redis.exists_returns_integer = false`, but this option will be removed in 5.0. (/usr/local/bundle/gems/sidekiq-6.0.7/lib/sidekiq/launcher.rb:160:in `block (2 levels) in ❤')

我应该在哪里设置这个设置？我试图创建一个初始值设定项，但我肯定我做错了：

# config/initializers/sidekiq.rb

redis_conn = proc {
  Redis.exists_returns_integer =  true
}

Sidekiq.configure_client do |config|
  config.redis = ConnectionPool.new(size: 5, &redis_conn)
end

Sidekiq.configure_server do |config|
  config.redis = ConnectionPool.new(size: 25, &redis_conn)
end

尝试使用上述初始值设定项中的代码时，容器失败，出现此错误：

sidekiq_1   | 2020-06-17T02:42:21.743Z pid=1 tid=gshym9ynx INFO: Booted Rails 5.2.4 application in development environment
sidekiq_1   | 2020-06-17T02:42:21.743Z pid=1 tid=gshym9ynx INFO: Running in ruby 2.5.8p224 (2020-03-31 revision 67882) [x86_64-linux]
sidekiq_1   | 2020-06-17T02:42:21.743Z pid=1 tid=gshym9ynx INFO: See LICENSE and the LGPL-3.0 for licensing details.
sidekiq_1   | 2020-06-17T02:42:21.743Z pid=1 tid=gshym9ynx INFO: Upgrade to Sidekiq Pro for more features and support: https://sidekiq.org
sidekiq_1   | undefined method `info' for true:TrueClass
sidekiq_1   | /usr/local/bundle/gems/sidekiq-6.0.7/lib/sidekiq.rb:118:in `block in redis_info'
sidekiq_1   | /usr/local/bundle/gems/sidekiq-6.0.7/lib/sidekiq.rb:97:in `block in redis'
sidekiq_1   | /usr/local/bundle/gems/connection_pool-2.2.3/lib/connection_pool.rb:63:in `block (2 levels) in with'
sidekiq_1   | /usr/local/bundle/gems/connection_pool-2.2.3/lib/connection_pool.rb:62:in `handle_interrupt'
sidekiq_1   | /usr/local/bundle/gems/connection_pool-2.2.3/lib/connection_pool.rb:62:in `block in with'
sidekiq_1   | /usr/local/bundle/gems/connection_pool-2.2.3/lib/connection_pool.rb:59:in `handle_interrupt'
sidekiq_1   | /usr/local/bundle/gems/connection_pool-2.2.3/lib/connection_pool.rb:59:in `with'
sidekiq_1   | /usr/local/bundle/gems/sidekiq-6.0.7/lib/sidekiq.rb:94:in `redis'
sidekiq_1   | /usr/local/bundle/gems/sidekiq-6.0.7/lib/sidekiq.rb:112:in `redis_info'
sidekiq_1   | /usr/local/bundle/gems/sidekiq-6.0.7/lib/sidekiq/cli.rb:61:in `run'
sidekiq_1   | /usr/local/bundle/gems/sidekiq-6.0.7/bin/sidekiq:31:in `<top (required)>'
sidekiq_1   | /usr/local/bundle/bin/sidekiq:23:in `load'
sidekiq_1   | /usr/local/bundle/bin/sidekiq:23:in `<top (required)>'
sidekiq_1   | /usr/local/lib/ruby/site_ruby/2.5.0/bundler/cli/exec.rb:74:in `load'
sidekiq_1   | /usr/local/lib/ruby/site_ruby/2.5.0/bundler/cli/exec.rb:74:in `kernel_load'
sidekiq_1   | /usr/local/lib/ruby/site_ruby/2.5.0/bundler/cli/exec.rb:28:in `run'
sidekiq_1   | /usr/local/lib/ruby/site_ruby/2.5.0/bundler/cli.rb:463:in `exec'
sidekiq_1   | /usr/local/lib/ruby/site_ruby/2.5.0/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
sidekiq_1   | /usr/local/lib/ruby/site_ruby/2.5.0/bundler/vendor/thor/lib/thor/invocation.rb:126:in `invoke_command'
sidekiq_1   | /usr/local/lib/ruby/site_ruby/2.5.0/bundler/vendor/thor/lib/thor.rb:387:in `dispatch'
sidekiq_1   | /usr/local/lib/ruby/site_ruby/2.5.0/bundler/cli.rb:27:in `dispatch'
sidekiq_1   | /usr/local/lib/ruby/site_ruby/2.5.0/bundler/vendor/thor/lib/thor/base.rb:466:in `start'
sidekiq_1   | /usr/local/lib/ruby/site_ruby/2.5.0/bundler/cli.rb:18:in `start'
sidekiq_1   | /usr/local/bin/bundle:30:in `block in <main>'
sidekiq_1   | /usr/local/lib/ruby/site_ruby/2.5.0/bundler/friendly_errors.rb:124:in `with_friendly_errors'
sidekiq_1   | /usr/local/bin/bundle:22:in `<main>'
test_sidekiq_1 exited with code 1