#
# If container priority=0 but there are committed container requests
# for it with priority>0, update priority.
- def self.update_priority
+ #
+ # Normally, update_priority is a no-op if another thread/process is
+ # already updating. Test cases that need to check priorities after
+ # updating can force a (possibly overlapping) update in the current
+ # thread/transaction by setting the "nolock" flag. See #14878.
+ def self.update_priority(nolock: false)
if !File.owned?(Rails.root.join('tmp'))
Rails.logger.warn("UpdatePriority: not owner of #{Rails.root}/tmp, skipping")
return
end
lockfile = Rails.root.join('tmp', 'update_priority.lock')
File.open(lockfile, File::RDWR|File::CREAT, 0600) do |f|
- return unless f.flock(File::LOCK_NB|File::LOCK_EX)
+ return unless nolock || f.flock(File::LOCK_NB|File::LOCK_EX)
# priority>0 but should be 0:
ActiveRecord::Base.connection.