Queue Classic crashes regularly with "PG::ConnectionBad: connection is closed"

[rmoriz]

On production instance (rake qc:work) regularly crashes with PG::ConnectionBad: connection is closed exceptions.

This may be related to QueueClassic's #317 and #318 .

I'm not sure if this has any real world impact as long as systemd restards the worker, which it does.

see logs

Feb 13 12:33:24 app01 systemd[1]: app-queue.service: Scheduled restart job, restart counter is at 9.
Feb 13 12:33:24 app01 systemd[1]: Stopped app-queue for app-backend.
Feb 13 12:33:24 app01 systemd[1]: Started app-queue for app-backend.
Feb 13 12:39:28 app01 app-queue[10513]: rake aborted!
Feb 13 12:39:28 app01 app-queue[10513]: PG::ConnectionBad: connection is closed
Feb 13 12:39:28 app01 app-queue[10513]: /srv/app/shared/bundle/2.6.2/ruby/2.6.0/gems/queue_classic-3.1.0/lib/queue_classic/conn_adapter.rb:36:in `exec'
Feb 13 12:39:28 app01 app-queue[10513]: /srv/app/shared/bundle/2.6.2/ruby/2.6.0/gems/queue_classic-3.1.0/lib/queue_classic/conn_adapter.rb:36:in `block in wait'
Feb 13 12:39:28 app01 app-queue[10513]: /srv/app/shared/bundle/2.6.2/ruby/2.6.0/gems/queue_classic-3.1.0/lib/queue_classic/conn_adapter.rb:31:in `synchronize'
Feb 13 12:39:28 app01 app-queue[10513]: /srv/app/shared/bundle/2.6.2/ruby/2.6.0/gems/queue_classic-3.1.0/lib/queue_classic/conn_adapter.rb:31:in `wait'
Feb 13 12:39:28 app01 app-queue[10513]: /srv/app/shared/bundle/2.6.2/ruby/2.6.0/gems/queue_classic-3.1.0/lib/queue_classic/worker.rb:95:in `lock_job'
Feb 13 12:39:28 app01 app-queue[10513]: /srv/app/shared/bundle/2.6.2/ruby/2.6.0/gems/queue_classic-3.1.0/lib/queue_classic/worker.rb:71:in `work'
Feb 13 12:39:28 app01 app-queue[10513]: /srv/app/shared/bundle/2.6.2/ruby/2.6.0/gems/queue_classic-3.1.0/lib/queue_classic/worker.rb:45:in `start'
Feb 13 12:39:28 app01 app-queue[10513]: /srv/app/shared/bundle/2.6.2/ruby/2.6.0/gems/queue_classic-3.1.0/lib/queue_classic/tasks.rb:27:in `block (2 levels) in <main>'
Feb 13 12:39:28 app01 app-queue[10513]: /srv/app/shared/bundle/2.6.2/ruby/2.6.0/gems/rake-13.0.0/exe/rake:27:in `<top (required)>'
Feb 13 12:39:28 app01 app-queue[10513]: /srv/app/.asdf/installs/ruby/2.6.2/bin/bundle:23:in `load'
Feb 13 12:39:28 app01 app-queue[10513]: /srv/app/.asdf/installs/ruby/2.6.2/bin/bundle:23:in `<main>'
Feb 13 12:39:28 app01 app-queue[10513]: Tasks: TOP => qc:work
Feb 13 12:39:28 app01 app-queue[10513]: (See full trace by running task with --trace)