uWSGI: I got problem with threaded mode

If I use uWSGI without threaded mode, it works fine. But my original server run with Apache ServerLimit 1, threaded-mode. It can handle concurrent connection, but my uWSGI can't (because worker only 1, I think). So I try to open threaded mode, but I will get 502 Bad Gateway error message from nginx.

My log showed me: uwsgi: Modules/gcmodule.c:277: visit_decref: Assertion `gc->gc.gc_refs != 0' failed.

I have no idea about what's wrong, How can I make it work? Thanks.

Here is my configuration:

[uwsgi]

show-config=True
socket=:8002
pidfile=/var/run/unicorn_uwsgi.pid
daemonize=/root/logs/unicorn_uwsgi.log
vacuum=True
enable-threads=True
threads=40
processes=1
env=QTDIR=/root/lib/qt
env=LD_LIBRARY_PATH=/root/lib/qt/lib
env=DISPLAY=:99
env=XAUTHORITY=/root/webapps/xvfb/Xauthority.xvfb
module=WSGI
home=/root/webapps/unicorn
pythonpath=/root/Source/Server/Unicorn
chdir=/root/Source/Server/Unicorn

I use nginx as HTTP server, here is configuration:

server {开发者_StackOverflow社区
    listen       80;
    server_name  _;

    location / {
        include uwsgi_params;
        uwsgi_pass 127.0.0.1:8002;
    }
}

OS: CentOS 6.0, CPU: AMD Athlon(tm) XP 2500+, RAM: 2G

Python 2.6.5 (default), uWSGI: 0.9.8.2, nginx: 0.8.54

Can you try with the centos6 supplied PyQt4 ? (from your config it looks like you are using pyqt, and there are various reports on this kind of problem in pyqt)