Hi,

The stack is nginx + uwsgi + pylons.  Whenever we restart our app, the first
request to each uwsgi worker process returns an error.  Now this is an easy
thing to work around as we are into the habit of hitting the app after a
restart (something you would naturally do anyway,) however, curiosity is
getting the better of us.

Here are some of the typical errors:


   - *OperationalError: (OperationalError) (2006, 'MySQL server has gone
   away')*
   - *ProgrammingError: (ProgrammingError) (2014, "Commands out of sync; you
   can't run this command now") *
   - *ResourceClosedError: This result object does not return rows. It has
   been closed automatically.*

The actual errors are all MySQL but we are guessing it has something to do
with the mysterious SQLAlchemy Session, the combination of uwsgi, timeouts
while everything spins up or some combination of all of the above.  We were
wondering if any other pylons developers have experienced a similar
behaviour?

Cheers

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