Job exception: JavaScript was terminated (either by timeout or explicitly)

I’ve just transitioned an older Discourse install (1.9.0.beta5) to a fresh droplet on Digital Ocean with latest everything. Given how old it was, I wasn’t sure everything would come over correctly but it seems to work fine.

Except it crashes every few hours.

This is the error log I got at 12:57am today:

Message

Job exception: JavaScript was terminated (either by timeout or explicitly)

Backtrace

/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/mini_racer-0.2.6/lib/mini_racer.rb:201:in `eval_unsafe' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/mini_racer-0.2.6/lib/mini_racer.rb:201:in `block (2 levels) in eval' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/mini_racer-0.2.6/lib/mini_racer.rb:307:in `timeout' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/mini_racer-0.2.6/lib/mini_racer.rb:200:in `block in eval' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/mini_racer-0.2.6/lib/mini_racer.rb:198:in `synchronize' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/mini_racer-0.2.6/lib/mini_racer.rb:198:in `eval' 
/var/www/discourse/lib/es6_module_transpiler/tilt/es6_module_transpiler_template.rb:122:in `block in module_transpile' 
/var/www/discourse/lib/es6_module_transpiler/tilt/es6_module_transpiler_template.rb:81:in `block in protect' 
/var/www/discourse/lib/es6_module_transpiler/tilt/es6_module_transpiler_template.rb:80:in `synchronize' 
/var/www/discourse/lib/es6_module_transpiler/tilt/es6_module_transpiler_template.rb:80:in `protect' 
/var/www/discourse/lib/es6_module_transpiler/tilt/es6_module_transpiler_template.rb:115:in `module_transpile' 
/var/www/discourse/lib/pretty_text.rb:42:in `apply_es6_file' 
/var/www/discourse/lib/pretty_text.rb:61:in `block in ctx_load_manifest' 
/var/www/discourse/lib/pretty_text.rb:58:in `each_line' 
/var/www/discourse/lib/pretty_text.rb:58:in `ctx_load_manifest' /var/www/discourse/lib/pretty_text.rb:83:in `create_es6_context' 
/var/www/discourse/lib/pretty_text.rb:124:in `block in v8' 
/var/www/discourse/lib/pretty_text.rb:122:in `synchronize' 
/var/www/discourse/lib/pretty_text.rb:122:in `v8' 
/var/www/discourse/lib/pretty_text.rb:144:in `block in markdown' 
/var/www/discourse/lib/pretty_text.rb:411:in `block in protect' 
/var/www/discourse/lib/pretty_text.rb:410:in `synchronize' 
/var/www/discourse/lib/pretty_text.rb:410:in `protect' 
/var/www/discourse/lib/pretty_text.rb:143:in `markdown' 
/var/www/discourse/lib/pretty_text.rb:257:in `cook' 
/var/www/discourse/app/models/post_analyzer.rb:33:in `cook' 
/var/www/discourse/app/models/post.rb:289:in `cook' 
/var/www/discourse/lib/cooked_post_processor.rb:30:in `initialize' 
/var/www/discourse/app/jobs/regular/process_post.rb:25:in `new' 
/var/www/discourse/app/jobs/regular/process_post.rb:25:in `execute' 
/var/www/discourse/app/jobs/base.rb:232:in `block (2 levels) in perform' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rails_multisite-2.0.7/lib/rails_multisite/connection_management.rb:63:in `with_connection' 
/var/www/discourse/app/jobs/base.rb:221:in `block in perform' 
/var/www/discourse/app/jobs/base.rb:217:in `each' 
/var/www/discourse/app/jobs/base.rb:217:in `perform' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/processor.rb:192:in `execute_job' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/processor.rb:165:in `block (2 levels) in process' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/middleware/chain.rb:128:in `block in invoke' 
/var/www/discourse/lib/sidekiq/pausable.rb:138:in `call' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/middleware/chain.rb:130:in `block in invoke' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/middleware/chain.rb:133:in `invoke' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/processor.rb:164:in `block in process' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/processor.rb:137:in `block (6 levels) in dispatch' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/job_retry.rb:109:in `local' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/processor.rb:136:in `block (5 levels) in dispatch' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq.rb:37:in `block in <module:Sidekiq>' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/processor.rb:132:in `block (4 levels) in dispatch' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/processor.rb:250:in `stats' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/processor.rb:127:in `block (3 levels) in dispatch' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/job_logger.rb:8:in `call' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/processor.rb:126:in `block (2 levels) in dispatch' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/job_retry.rb:74:in `global' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/processor.rb:125:in `block in dispatch' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/logging.rb:48:in `with_context' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/logging.rb:42:in `with_job_hash_context' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/processor.rb:124:in `dispatch' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/processor.rb:163:in `process' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/processor.rb:83:in `process_one' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/processor.rb:71:in `run' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/util.rb:16:in `watchdog' 
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/sidekiq-5.2.7/lib/sidekiq/util.rb:25:in `block in safe_thread'

Env

|hostname|dow-18-app|
| --- | --- |
|process_id|8390|
|application_version|800e49f16e43e0783d30971e84a4e4619d448a7c|
|current_db|default|
|current_hostname|forum.driveonwood.com|
|job|Jobs::ProcessPost|
|problem_db|default|
||opts null

post_id 94118
--- ---
bypass_bump true
new_post false
current_site_id default|

The site was unresponsive when I tried to load it this morning, I got a 504 error. The server was still running, and the log in ./launcher log app showed this repeatedly:

ok: run: redis: (pid 48) 11912s
ok: run: postgres: (pid 47) 11912s
supervisor pid: 26654 unicorn pid: 26658
config/unicorn_launcher: line 71: kill: (26658) - No such process
config/unicorn_launcher: line 15: kill: (26658) - No such process
(26654) exiting

After rebooting at 9am, the site ran OK for a few hours, then it crashed again at 11:04am. Substantially the same error logs in both places. Rebooting again solved the issue (for now). I’ll keep an eye on it, and reboot as needed until I get this solved.

Site is here: http://forum.driveonwood.com

1 Like

This is likely load related, how is CPU looking on your server? How is memory?

3 Likes

Site seems to be stable since those two crashes. CPU and memory use are normal. I don’t know what they were during the downtime. Perhaps there was some heavy load initially due to the transition.

I’ll update this thread if anything happens.

Just crashed. I rebooted the server again, and it is currently using 70-80% CPU. It is converting jpgs for some reason, and we have a lot of photos. I’ll reboot as need, hopefully this is a one-time task.

1 Like

Crashed again today. Before restarting, I noted 97% of CPU is going to this process:

ruby /var/www/discourse/vendor/bundle/ruby/2.6.0/bin/unicorn -E production -c config/unicorn.conf.rb

Overall memory usage:

  3073648 K total memory
  904712 K used memory
 1510576 K active memory
  376240 K inactive memory
  815448 K free memory
  306872 K buffer memory
 1046616 K swap cache
       0 K total swap
       0 K used swap
       0 K free swap

Any insights on what this particular process does?

The way that images are stored changed a while back and they’re all being processed. There’s stuff that’s supposed to keep it from crashing x but it’s not enough for you. I would recommend increasing your ram for a while until they’re all done.

I think that there is a site setting that controls how many images are processed in a batch, but can’t quite remember what it is this instant.

2 Likes

Thanks. I suspected something like that. We have 15 GB of images.

I’ll keep an eye on it, and just reboot as needed.

1 Like

More specifically, the srcset attribute is now supported on the <img> tag so retina devices see higher resolution images. This means more copies of images as a side effect, because you have multiple display densities to serve with the same image.

See https://html.com/attributes/img-srcset/

1 Like