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I have a Flask application that uses a messaging library that is NOT process safe (multiple processes using the same pointer results in a panic: not fork-reentrant error)

I've noticed that there is a large difference between the options on this flask page: http://flask.pocoo.org/docs/1.0/deploying/wsgi-standalone/

Gevent works for my application. I never get into a panic.

UWSGI does not work for my application; it panics as soon as the second request comes in.

Is the following understanding correct then?
Gevent works using greenlet which is a coutourtine library, but it executes all within a single process.
UWSGI launches a new process for each incoming request, so upon the second request, a process is launched and the shared memory is access which causes the panic.

I guess my high level question is what the exact difference between uwsgi and gevent.pywsgi is>?

python flask gevent

share|improve this question

asked Mar 24 at 2:08

TommyTommy

5,28663562

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What is your uwsgi config?
  
  – Fian
  Mar 25 at 12:52
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Fian I am using this project, and it seems to have a VERY terse uwsgi: github.com/tiangolo/uwsgi-nginx-flask-docker/blob/master/…
  
  – Tommy
  Mar 25 at 13:41
  

  
  
  
  

add a comment | 

0

I have a Flask application that uses a messaging library that is NOT process safe (multiple processes using the same pointer results in a panic: not fork-reentrant error)

I've noticed that there is a large difference between the options on this flask page: http://flask.pocoo.org/docs/1.0/deploying/wsgi-standalone/

Gevent works for my application. I never get into a panic.

UWSGI does not work for my application; it panics as soon as the second request comes in.

Is the following understanding correct then?
Gevent works using greenlet which is a coutourtine library, but it executes all within a single process.
UWSGI launches a new process for each incoming request, so upon the second request, a process is launched and the shared memory is access which causes the panic.

I guess my high level question is what the exact difference between uwsgi and gevent.pywsgi is>?

python flask gevent

share|improve this question

asked Mar 24 at 2:08

TommyTommy

5,28663562

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What is your uwsgi config?
  
  – Fian
  Mar 25 at 12:52
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Fian I am using this project, and it seems to have a VERY terse uwsgi: github.com/tiangolo/uwsgi-nginx-flask-docker/blob/master/…
  
  – Tommy
  Mar 25 at 13:41
  

  
  
  
  

add a comment | 

I have a Flask application that uses a messaging library that is NOT process safe (multiple processes using the same pointer results in a panic: not fork-reentrant error)

I've noticed that there is a large difference between the options on this flask page: http://flask.pocoo.org/docs/1.0/deploying/wsgi-standalone/

Gevent works for my application. I never get into a panic.

UWSGI does not work for my application; it panics as soon as the second request comes in.

Is the following understanding correct then?
Gevent works using greenlet which is a coutourtine library, but it executes all within a single process.
UWSGI launches a new process for each incoming request, so upon the second request, a process is launched and the shared memory is access which causes the panic.

I guess my high level question is what the exact difference between uwsgi and gevent.pywsgi is>?

python flask gevent

share|improve this question

asked Mar 24 at 2:08

TommyTommy

5,28663562

share|improve this question

asked Mar 24 at 2:08

TommyTommy

5,28663562

share|improve this question

asked Mar 24 at 2:08

TommyTommy

5,28663562

asked Mar 24 at 2:08

TommyTommy

5,28663562

asked Mar 24 at 2:08

TommyTommy

5,28663562