No request in progress

[jaredmoody]

I'm seeing this error pop up in my logs intermittently, always with this jbuilder template:

json.array! @projects, partial: 'project', as: :project, cached: ->(project) { [project.location, project] }

Recently, this template was changed, and the error started after changing cached: true to what it is above.

Abbreviated stacktrace:

vendor/bundle/ruby/3.0.0/gems/dalli-3.2.5/lib/dalli/protocol/connection_manager.rb:107:in `confirm_in_progress!': [Dalli] No request in progress. This may be a bug in Dalli. (ActionView::Template::Error)
    from vendor/bundle/ruby/3.0.0/gems/dalli-3.2.5/lib/dalli/protocol/base.rb:179:in `verify_pipelined_state'
    from vendor/bundle/ruby/3.0.0/gems/dalli-3.2.5/lib/dalli/protocol/base.rb:75:in `pipeline_response_setup'
    from vendor/bundle/ruby/3.0.0/gems/dalli-3.2.5/lib/dalli/pipelined_getter.rb:81:in `finish_query_for_server'
    from vendor/bundle/ruby/3.0.0/gems/dalli-3.2.5/lib/dalli/pipelined_getter.rb:66:in `block in finish_queries'
    from vendor/bundle/ruby/3.0.0/gems/dalli-3.2.5/lib/dalli/pipelined_getter.rb:62:in `each'
    from vendor/bundle/ruby/3.0.0/gems/dalli-3.2.5/lib/dalli/pipelined_getter.rb:62:in `finish_queries'
    from vendor/bundle/ruby/3.0.0/gems/dalli-3.2.5/lib/dalli/pipelined_getter.rb:35:in `setup_requests'
    from vendor/bundle/ruby/3.0.0/gems/dalli-3.2.5/lib/dalli/pipelined_getter.rb:20:in `block in process'
    from vendor/bundle/ruby/3.0.0/gems/dalli-3.2.5/lib/dalli/ring.rb:78:in `lock'
    from vendor/bundle/ruby/3.0.0/gems/dalli-3.2.5/lib/dalli/pipelined_getter.rb:19:in `process'
    from vendor/bundle/ruby/3.0.0/gems/dalli-3.2.5/lib/dalli/client.rb:108:in `block in get_multi'
    from vendor/bundle/ruby/3.0.0/gems/dalli-3.2.5/lib/dalli/client.rb:107:in `get_multi'
    from vendor/bundle/ruby/3.0.0/gems/activesupport-6.1.7.4/lib/active_support/cache/mem_cache_store.rb:165:in `block in read_multi_entries'

[goyal]

I am getting the same error quite a few times.
Did you happen to find any resolution yet?

[jaredmoody]

Getting no response and not knowing how to debug this library myself, I resolved by switching from memcached to redis for our cache store and not using this library any longer 🤷