Sidekiq

How to check whether sidekiq is running (and start it if it isn't running)

When new items or uploaded or existing items are updated, the jobs of (re)generating the thumbnail images, attaching attachments to the work, and adding works to parent collections, are queued for asynchronous processing by sidekiq.

sidekiq should stay running, but it has happened that sidekiq needs to be restarted.

You can check the status of sidekiq by running

sudo service sidekiq status

Here's an example of the output when sidekiq is running and is currently processing jobs:

● sidekiq.service - sidekiq
   Loaded: loaded (/lib/systemd/system/sidekiq.service; disabled; vendor preset: enabled)
   Active: active (running) since Wed 2022-02-23 14:04:01 EST; 9 months 24 days ago
 Main PID: 23611 (ruby)
    Tasks: 32 (limit: 4915)
   CGroup: /system.slice/sidekiq.service
           ├─23611 sidekiq 6.4.1 scholarspace-hyrax [3 of 3 busy]
           ├─30464 identify /tmp/mini_magick20221219-23611-1mml18i.pdf
           ├─30465 gs -sstdout=%stderr -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMaxBi
           ├─30513 sh -c /usr/local/bin/fits-1.5.0/fits.sh -i "/tmp/tmpcq2nqt8f/Rea_gwu_007
           ├─30514 java -classpath :/usr/local/bin/fits-1.5.0/lib/aes-31.3.jar:/usr/local/b
           ├─30538 identify /tmp/mini_magick20221219-23611-wm29s6.pdf
           └─30539 gs -sstdout=%stderr -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMaxBi

In this example, we see gs (ghostscript) jobs that are generating thumbnails, and identify jobs that are identifying the file type of new attachments.

If sidekiq isn't running, you can start it with:

sudo service sidekiq start

sidekiq also has an web-viewable administrative interface running on a certain port, which you can view if that port has been opened to the IP from which you're accessing it.