ronin-150602 (at lighthouseapp)

Wait, I found it, sorry for the noise.

I've compiled devel from git and run my test script on it, and can confirm that the bug no longer occurs here. :)

Wonderful! Thank you, Daniele. Is there a branch I can pull to test the fix here?

Aw, darn.

Given the other symptoms (traceback, etc) that sometimes occur instead of the deadlock, I was hoping for a 'simple' concurrency issue, perhaps a missi...

Hi Daniele,

Thank you for your help. :)

If it helps, we have noticed that at the time the poll() call occurs, the PostgreSQL server thinks that all its client c...

Side note: sometimes psycopg seems to raise a SystemError exception instead of deadlocking, hinting at other underlying concurrency issues:

Exception in thread...

rel-2.4.0
os-linux

In the particular setup implemented in the attached file, psycopg ends up deadlocking.

The setup: all the threads share a single connection. ...