Unable to run test without redis due to at exit handler: at_exit(&method(:flush_stats))

[arufanov]

Ruby version: ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux-gnu]
Sidekiq / Pro / Enterprise version(s): Sidekiq

Please include your initializer and any error message with the full backtrace.
command bin/rspec spec/jobs/ --tag ~database:postgresql --backtrace produces

Traceback (most recent call last):
	26: from /var/lib/gems/2.5.0/gems/sidekiq-6.0.6/lib/sidekiq/launcher.rb:103:in `flush_stats'
	25: from /var/lib/gems/2.5.0/gems/sidekiq-6.0.6/lib/sidekiq.rb:94:in `redis'
	24: from /var/lib/gems/2.5.0/gems/connection_pool-2.2.2/lib/connection_pool.rb:61:in `with'
	23: from /var/lib/gems/2.5.0/gems/connection_pool-2.2.2/lib/connection_pool.rb:61:in `handle_interrupt'
	22: from /var/lib/gems/2.5.0/gems/connection_pool-2.2.2/lib/connection_pool.rb:64:in `block in with'
	21: from /var/lib/gems/2.5.0/gems/connection_pool-2.2.2/lib/connection_pool.rb:64:in `handle_interrupt'
	20: from /var/lib/gems/2.5.0/gems/connection_pool-2.2.2/lib/connection_pool.rb:65:in `block (2 levels) in with'
	19: from /var/lib/gems/2.5.0/gems/sidekiq-6.0.6/lib/sidekiq.rb:97:in `block in redis'
	18: from /var/lib/gems/2.5.0/gems/sidekiq-6.0.6/lib/sidekiq/launcher.rb:104:in `block in flush_stats'
	17: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis.rb:2411:in `pipelined'
	16: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis.rb:52:in `synchronize'
	15: from /usr/lib/ruby/2.5.0/monitor.rb:226:in `mon_synchronize'
	14: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis.rb:52:in `block in synchronize'
	13: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis.rb:2416:in `block in pipelined'
	12: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis/client.rb:162:in `call_pipeline'
	11: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis/client.rb:306:in `with_reconnect'
	10: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis/client.rb:164:in `block in call_pipeline'
	 9: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis/client.rb:196:in `call_pipelined'
	 8: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis/client.rb:230:in `process'
	 7: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis/client.rb:319:in `logging'
	 6: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis/client.rb:231:in `block in process'
	 5: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis/client.rb:381:in `ensure_connected'
	 4: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis/client.rb:105:in `connect'
	 3: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis/client.rb:306:in `with_reconnect'
	 2: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis/client.rb:106:in `block in connect'
	 1: from /var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis/client.rb:343:in `establish_connection'
/var/lib/gems/2.5.0/gems/redis-4.1.3/lib/redis/client.rb:362:in `rescue in establish_connection': Error connecting to Redis on 127.0.0.1:6379 (Errno::ECONNREFUSED) (Redis::CannotConnectError)
root@arufanov:~/Workspaces/TimeVizor/TimeVizor# 

due to line "at_exit(&method(:flush_stats))" launcher.rb. Sidekiq 6.0.5 is working fine without redis, but Sidekiq 6.0.6 doesn't work at test mode without redis. Also now I am not able to make bin/rails db:drop db:create db:migrate db:seed without redis.

Are you using an old version? No.
Have you checked the changelogs to see if your issue has been fixed in a later version?

https://github.com/mperham/sidekiq/blob/master/Changes.md
https://github.com/mperham/sidekiq/blob/master/Pro-Changes.md
https://github.com/mperham/sidekiq/blob/master/Ent-Changes.md

[mperham]

the changelog points to the issue

[arufanov]

@mperham

• thanks, next time will check changelog before.
• just my opinion about design decision: this restriction (= to have running redis) is too strong. I am not able to use all windows and mac machines as CI nodes as well as use windows machine as workstation to develop app without extra efforts

[arufanov]

As I am able to see, you are going to fix this restriction (#4502) in the future versions. Thanks!