我目前有一个Rails 3.2.13应用使用redis作为cache_store和Sidekiq。
我也在使用redis master-slave。我遇到了一个问题，在故障转移期间，一个从服务器正在成为主服务器，然后Rails连接到该节点，一旦它尝试写入节点，即使节点是master，也会引发此异常：
Redis::CommandError: READONLY You can't write against a read only slave.
vendor/bundle/ruby/1.9.1/gems/redis-3.0.4/lib/redis/client.rb:85:in `call'
vendor/bundle/ruby/1.9.1/gems/redis-3.0.4/lib/redis.rb:1181:in `block in srem'
vendor/bundle/ruby/1.9.1/gems/redis-3.0.4/lib/redis.rb:36:in `block in synchronize'
/usr/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
vendor/bundle/ruby/1.9.1/gems/redis-3.0.4/lib/redis.rb:36:in `synchronize'
vendor/bundle/ruby/1.9.1/gems/redis-3.0.4/lib/redis.rb:1180:in `srem'
vendor/bundle/ruby/1.9.1/gems/redis-namespace-1.3.0/lib/redis/namespace.rb:306:in `method_missing'
vendor/bundle/ruby/1.9.1/gems/sidekiq-2.11.2/lib/sidekiq/manager.rb:123:in `block in clear_worker_set'
vendor/bundle/ruby/1.9.1/gems/connection_pool-1.0.0/lib/connection_pool.rb:48:in `with'
vendor/bundle/ruby/1.9.1/gems/sidekiq-2.11.2/lib/sidekiq.rb:67:in `redis'
vendor/bundle/ruby/1.9.1/gems/sidekiq-2.11.2/lib/sidekiq/manager.rb:118:in `clear_worker_set'
vendor/bundle/ruby/1.9.1/gems/sidekiq-2.11.2/lib/sidekiq/manager.rb:45:in `block in stop'
vendor/bundle/ruby/1.9.1/gems/sidekiq-2.11.2/lib/sidekiq/util.rb:15:in `watchdog'
vendor/bundle/ruby/1.9.1/gems/sidekiq-2.11.2/lib/sidekiq/manager.rb:33:in `stop'
vendor/bundle/ruby/1.9.1/gems/celluloid-0.14.0/lib/celluloid/calls.rb:25:in `public_send'
vendor/bundle/ruby/1.9.1/gems/celluloid-0.14.0/lib/celluloid/calls.rb:25:in `dispatch'
vendor/bundle/ruby/1.9.1/gems/celluloid-0.14.0/lib/celluloid/calls.rb:125:in `dispatch'
vendor/bundle/ruby/1.9.1/gems/celluloid-0.14.0/lib/celluloid/actor.rb:328:in `block in handle_message'
vendor/bundle/ruby/1.9.1/gems/celluloid-0.14.0/lib/celluloid/tasks.rb:42:in `block in initialize'
vendor/bundle/ruby/1.9.1/gems/celluloid-0.14.0/lib/celluloid/tasks/task_fiber.rb:9:in `block in create'
我知道可以通过断开使用redis的任何内容（例如sidekiq，rails cache_store）来轻松解决问题，以便写入该节点的任何后续命令都将重新连接到有效连接。
问题是捕获和处理异常的位置？我最初的想法是进行airbrake全球救援，但不确定这是否是最佳方式。
有没有人遇到过这个问题？