Jaime, I think the issue is that uWSGI likely uses an asynchronous event loop underneath with non-blocking sockets. When zeromq/pyzmq is used in that context, zeromq socket have to be integrated into the event loop at a very low level using:
1) zmq_poll (for zeromq 2.0.x and 2.1.x) 2) ZMQ_FD/ZMQ_EVENTS (for zeromq 2.1.x) The exact point of conflict is that both zeromq and uWSGI are using something like poll to handle IO in the event loop. The two event loops don't know how to coordinate their activities and end up stepping on each other's toes. The only libraries that I know of that handle this (in python that is) are: 1) pyzmq.eventloop.ioloop (a tornado-compatible event loop). 2) eventlet Hope this helps. Brian 2010/11/23 Jaime Fernández <[email protected]> > Hi all, > > I'm using the Python binding for ZMQ.Initially I was using 2 patterns: > REQ/REP and PUSH/PULL with the reference WSGi server (wsgiref) and > everything worked perfectly. > > Yesterday, I decided to move the code to a sandbox based on 2 Ubuntu > machines (Ubuntu 10.04 LTS). I installed the latest versions of zmq and > pyzmq (both of them were 2.0.10) available in the website as tar.gz. > Although everything compiled, the PUSH/PULL messages were not exchanged > (even in the same machine). Everything was solved after downloading the GIT > version of both zmq and pyzmq. > > However, the unsolved problem is that zmq (or pyzmq) does not work when > executed in uWSGI server. I don't know what's the reason of the problem but > no zmq message is sent from the code executed inside the uWSGI. However, if > the code is executed inside wsgiref, ZMQ works perfectly. > > Do you know what can cause this behaviour? Any solution? Could another ZMQ > version fix the problem? > > Thanks in advance, > Jaime > > _______________________________________________ > zeromq-dev mailing list > [email protected] > http://lists.zeromq.org/mailman/listinfo/zeromq-dev > > -- Brian E. Granger, Ph.D. Assistant Professor of Physics Cal Poly State University, San Luis Obispo [email protected] [email protected]
_______________________________________________ zeromq-dev mailing list [email protected] http://lists.zeromq.org/mailman/listinfo/zeromq-dev
