discourse/lib/demon/sidekiq.rb
Alan Guo Xiang Tan 9fdcdcf58d
DEV: Log error encountered when reopening sidekiq logs (#27411)
We are seeing the following error in our logs when Sidekiq is sent a
`USR1` signal in production when logrotate happens:

```
log writing failed. stream closed in another thread
Error encountered while starting Sidekiq: can't be called from trap context\n/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/unicorn-6.1.0/lib/unicorn/util.rb:71:in `reopen'
```

I'm not quite sure where the error is triggered from so I'm improving
the way we log errors.
2024-06-11 12:29:48 +08:00

79 lines
2.0 KiB
Ruby

# frozen_string_literal: true
require "demon/base"
class Demon::Sidekiq < ::Demon::Base
def self.prefix
"sidekiq"
end
def self.after_fork(&blk)
blk ? (@blk = blk) : @blk
end
private
def suppress_stdout
false
end
def suppress_stderr
false
end
def log_in_trap(message, level: :info)
SignalTrapLogger.instance.log(@logger, message, level: level)
end
def after_fork
Demon::Sidekiq.after_fork&.call
SignalTrapLogger.instance.after_fork
log("Loading Sidekiq in process id #{Process.pid}")
require "sidekiq/cli"
cli = Sidekiq::CLI.instance
# Unicorn uses USR1 to indicate that log files have been rotated
Signal.trap("USR1") do
begin
log_in_trap("Sidekiq reopening logs...")
Unicorn::Util.reopen_logs
log_in_trap("Sidekiq done reopening logs...")
rescue => error
log_in_trap(
"Error encountered while reopening logs: [#{error.class}] #{error.message}\n#{error.backtrace.join("\n")}",
level: :error,
)
exit 1
end
end
options = ["-c", GlobalSetting.sidekiq_workers.to_s]
[["critical", 8], ["default", 4], ["low", 2], ["ultra_low", 1]].each do |queue_name, weight|
custom_queue_hostname = ENV["UNICORN_SIDEKIQ_#{queue_name.upcase}_QUEUE_HOSTNAME"]
if !custom_queue_hostname || custom_queue_hostname.split(",").include?(Discourse.os_hostname)
options << "-q"
options << "#{queue_name},#{weight}"
end
end
# Sidekiq not as high priority as web, in this environment it is forked so a web is very
# likely running
Discourse::Utils.execute_command("renice", "-n", "5", "-p", Process.pid.to_s)
cli.parse(options)
load Rails.root + "config/initializers/100-sidekiq.rb"
cli.run
rescue => error
log(
"Error encountered while starting Sidekiq: [#{error.class}] #{error.message}\n#{error.backtrace.join("\n")}",
level: :error,
)
exit 1
end
end