A user, williamherry, is experiencing an issue with file uploads in a production environment on a CentOS host. The problem occurs when using the Scheduler::Defer block, where the file object loses some attributes. After debugging, williamherry found that the issue only occurs in the production environment on CentOS and not in the development environment on Ubuntu or Mac.
Further investigation revealed that the issue is related to the use of Unicorn and instance variables within the Scheduler::Defer block. williamherry found that when using Unicorn, the instance variables are lost, while switching to Thin resolves the issue.
Falco pointed out a duplicate issue, where a similar problem was reported with Tempfile being nil on deferred uploads. A possible solution can be found in the linked discussion, specifically in the 13th post.
I deployed a instance manually on a centos host, image upload does not work, after several hours of debug, I find file in Scheduler::Defer block lost some attribites, see debug code below
def create
type = params.require(:type)
file = params[:file] || params[:files].try(:first)
url = params[:url]
client_id = params[:client_id]
synchronous = is_api? && params[:synchronous]
if type == "avatar"
if SiteSetting.sso_overrides_avatar || !SiteSetting.allow_uploaded_avatars
return render json: failed_json, status: 422
end
end
Rails.logger.error(file.tempfile.path) # =>url
if true #synchronous
data = create_upload(type, file, url)
render json: data.as_json
else
Scheduler::Defer.later("Create Upload") do
Rails.logger.error(file.tempfile.path) # => nil
data = create_upload(type, file, url)
MessageBus.publish("/uploads/#{type}", data.as_json, client_ids: [client_id])
end
render json: success_json
end
end
I think it’s not easy to repro, I run development environment on ubuntu and mac all works, this problem only occur on a centos host with production environment, and I am not using docker to install that
I will post the info I get so far in case some one interested
Now I can narrow down the problem to: when use unicorn, object within Scheduler::Defer.later block will lost their instance_variables
a = "1"
a.instance_variable_set('@a', 1)
Rails.logger.error(a.instance_values) # => {"a"=>1}
Scheduler::Defer.later("Create Upload") do
Rails.logger.error(a.instance_values) # => nothing
end
If I start a console by rails c and run above code, the result is as expected,
after switch to thin, image upload works
unicorn also not work on my development machine, which is ubuntu, but the result is a little bit different: the instance_varialbes remains, but the tempfile is show closed, call path on that return nil
I’m afraid you’re on your own here (CentOS + non-docker install).