Stuck processes about rest-core HOT 5 CLOSED

According to the stack trace, could it be waiting for the response from the
remote server? Did you setup any timeout? If yes, it could probably be a
bug in rest-core somewhere... otherwise, try to setup some timeout?

from rest-core.

I didn't have a timeout... so like this: use RC::Timeout, 30 ?

from rest-core.

Sorry for the late response. Yes, that would effectively make all the requests
default to 30 seconds timeout. However, I just checked the HTTP client used
underneath rest-core, there should have some default timeout:
https://github.com/nahi/httpclient/blob/v2.5.3.3/lib/httpclient/session.rb#L133-L139
According to your stack trace, it should be receiving some data, therefore it should
have maximum 60 seconds for connecting and 60 seconds for receiving, if you're
posting some data, maybe add another 120 seconds, that means it should
never block more than 240 seconds.

The other possibility to block indefinitely might be, if you're using thread pool by
setting something like this: YourClient.pool_size = 10, then you can't nest
callbacks more than 10 levels.

For example, suppose the pool size was 1, then this would deadlock:

require 'rest-core'
RC::Universal.pool_size = 1
client = RC::Universal.new
client.get('http://example.com/1') do |_|
  puts client.get('http://example.com/2')
end
client.wait # DEADLOCK

This is because a request is only considered done when the callback is
also called, but above we tried to make a second request in the first callback,
waiting for the first callback to be done, but it's never going to be. Therefore
the second request can never begin, and the first callback could never be done.
We could try to detect this deadlock and raise some errors, but I haven't tried to
do so at the moment.

If you're not using callbacks nor thread pool, then nothing should really deadlock.
If you have any ideas what might go wrong, it would be much appreciated.

from rest-core.

Thank you very much! I will observe further and also leave my timeout in...

will come back if I have more info that could be helpful...

from rest-core.

Thank you for trying and reporting :)
Personally I never see this kind of issues, but honestly
I am not too confident if everything is alright.
So please do let me know if there's anything I could help.
Thanks!

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