我目前有一个Rails 3.2.13应用程序使用redisascache_store和 for Sidekiq。
我也在使用redis主从。我遇到了一个问题，在故障转移期间，从属服务器将成为主服务器，Rails 然后连接到该节点，一旦它尝试写入该节点，即使该节点是 ，也会master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'
我知道这个问题可以很容易地通过断开使用redis的任何东西（例如sidekiqrails cache_store）来解决，这样任何写入该节点的后续命令都可以通过有效连接重新连接。
问题是在哪里捕获和处理异常？我最初的想法是进行airbrake一种全球救援，但不确定这是否是最好的方法。
有没有人遇到过这个问题？