kazoo hangs in uwsgi

[rhyspang]

I use uwsgi to start django application, which call start method in kazoo client instance to connect zookeeper server, it hangs. even if I use --enable-threads . Exception traceback as follow, could you give me some advise, thanks a lot!

self._zk.start(timeout=timeout)
  File "/Users/rhys/.local/share/virtualenvs/dialog-Pn4M1tPm/lib/python2.7/site-packages/kazoo/client.py", line 559, in start
    self.stop()
  File "/Users/rhys/.local/share/virtualenvs/dialog-Pn4M1tPm/lib/python2.7/site-packages/kazoo/client.py", line 613, in stop
    self._safe_close()
  File "/Users/rhys/.local/share/virtualenvs/dialog-Pn4M1tPm/lib/python2.7/site-packages/kazoo/client.py", line 506, in _safe_close
    if not self._connection.stop(timeout):
  File "/Users/rhys/.local/share/virtualenvs/dialog-Pn4M1tPm/lib/python2.7/site-packages/kazoo/protocol/connection.py", line 180, in stop
    self.connection_stopped.wait(timeout)
  File "/Users/rhys/.pyenv/versions/2.7.15/lib/python2.7/threading.py", line 614, in wait
    self.__cond.wait(timeout)
  File "/Users/rhys/.pyenv/versions/2.7.15/lib/python2.7/threading.py", line 359, in wait
    _sleep(delay)

[StephenSorriaux]

Hi,

Sounds similar to https://github.com/python-zk/kazoo/issues/536

What version of Kazoo are you using? Zookeeper? What value of timeout are you passing? Have you got any logs on Zookeeper's side that can explain the timeout?

[rhyspang]

Hi,

Sounds similar to #536

What version of Kazoo are you using? Zookeeper? What value of timeout are you passing? Have you got any logs on Zookeeper's side that can explain the timeout?

kazoo==2.5.0 timeout = 3.0

There is no log in Zookepper's side. Everything is ok when I start my django application using python manage.py runserver, but with uwsgi run, it hangs in start() method of kazoo client instance,

[StephenSorriaux]

Can you give us more details about your app? How did you create your thread? How are you launching your uswgi?

I tried using python 2.7.15, and:

(venv) stephen@somewhere:~/dev/temp/mysite$ pip list
Package    Version 
---------- --------
Django     1.11.16 
kazoo      2.6.0   
pip        18.1    
pytz       2018.7  
setuptools 40.6.2  
six        1.11.0  
uWSGI      2.0.17.1
wheel      0.32.3  

I launch uwsgi using uwsgi --http :8000 --module mysite.wsgi --enable-threads and the thread is correctly running.