wpdavenport
commented
6 years ago I am also seeing this same issue on Rails 5.0.6. However, I'm not seeing it on Rails 4.2.8 using the same configuration on both apps.
What I have noticed is that this error can happen from one request to the next. Initially, I thought it may be due to a session timeout, but I found that it can happen on any type request (i.e. GET, POST). However, subsequent refresh's of the same page or action (like a remove JS call) and the error will go away for while.
Is there something else that needs to be set to resolve this?
- PostgreSQL 9.6.2
- Rails 5.0.6
- Makara (master)
- Ruby 2.4.2p198
Error
NoMethodError: undefined method `query_cache_enabled' for nil:NilClass
from active_record/connection_adapters/abstract/query_cache.rb:120:in `configure_query_cache!'
from active_support/callbacks.rb:382:in `block in make_lambda'
from active_support/callbacks.rb:242:in `block in simple'
from active_support/callbacks.rb:456:in `block in call'
from active_support/callbacks.rb:456:in `each'
from active_support/callbacks.rb:456:in `call'
from active_support/callbacks.rb:101:in `__run_callbacks__'
from active_support/callbacks.rb:750:in `_run_checkout_callbacks'
from makara/connection_wrapper.rb:99:in `public_send'
from makara/connection_wrapper.rb:99:in `method_missing'
from makara/proxy.rb:106:in `public_send'
from makara/proxy.rb:106:in `block in method_missing'
from makara/proxy.rb:153:in `block in any_connection'
from makara/pool.rb:105:in `block in provide'
from active_record/connection_adapters/makara_abstract_adapter.rb:37:in `handle'
from makara/pool.rb:104:in `provide'
from makara/proxy.rb:152:in `any_connection'
from makara/proxy.rb:104:in `method_missing'
from active_record/connection_adapters/abstract/connection_pool.rb:777:in `checkout_and_verify'
from active_record/connection_adapters/abstract/connection_pool.rb:490:in `checkout'
from active_record/connection_adapters/abstract/connection_pool.rb:364:in `connection'
from active_record/connection_adapters/abstract/connection_pool.rb:883:in `retrieve_connection'
from active_record/connection_handling.rb:128:in `retrieve_connection'
from active_record/connection_handling.rb:91:in `connection'
from active_record/relation/delegation.rb:43:in `connection'
from active_record/relation/query_methods.rb:105:in `bound_attributes'
from active_record/relation.rb:706:in `exec_queries'
from active_record/relation.rb:583:in `load'
from active_record/relation.rb:260:in `records'
from active_record/relation.rb:256:in `to_a'
from active_record/relation/finder_methods.rb:563:in `find_nth_with_limit'
from active_record/relation/finder_methods.rb:592:in `find_nth_with_limit_and_offset'
from active_record/relation/finder_methods.rb:545:in `find_nth'
from active_record/relation/finder_methods.rb:122:in `first'
from orm_adapter/adapters/active_record.rb:17:in `get'
from devise/models/authenticatable.rb:229:in `serialize_from_session'
from devise.rb:478:in `block (2 levels) in configure_warden!'
from warden/session_serializer.rb:35:in `fetch'database.yml
staging:
adapter: postgresql_makara
encoding: unicode
pool: 10
makara:
blacklist_duration: 0
disable_blacklist: true
master_ttl: 5
master_strategy: round_robin
sticky: true
connections:
- role: master
url: <removed>
- role: slave
url: <removed>
arpitvaishnav
SVMKwangillJung
tmedford
wendy0402
lukluk
I get an exception
undefined method 'query_cache_enabled' for nil:NilClasswhenmasterrecovers after downtime for the first requests. There is a backtrace:database.yml: