Finally, I found I identified the problem but I don't know why.
According to ZMQ specification, the ZMQ context should be shared to create
all the ZMQ sockets of the same process. What we did, is to create a Python
module which creates such ZMQ context:
# zmq_context.py
import zmq
context = zmq.Context()
If you create the following WSGI app:
import zmq
import zmq_context
def application(environ, start_response):
context = zmq_context.context
socket_push = context.socket(zmq.PUSH)
socket_push.connect('tcp://localhost:9876')
socket_push.send_multipart(["Hello", "World"])
Then uWSGi dies when zmq tries to connect to the ZQM socket.
However, if we don't use the zmq_context module and create the context
directly:
import zmq
def application(environ, start_response):
context = zmq.Context()
socket_push = context.socket(zmq.PUSH)
socket_push.connect('tcp://localhost:9876')
socket_push.send_multipart(["Hello", "World"])
Everything works.
Why? I cannot see any difference. And, as I said, it works with wsgiref (I
haven't tested with other WSGi servers)
Thanks in advance,
Jaime
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