[Twisted-Python] reconnecting ConnectionPools

Christopher Armstrong radix at twistedmatrix.com
Sun Jul 25 13:28:31 EDT 2004

In my client's app we've been having problems with database connections 
going down; so far if that happens we need to restart the server to 
reconnect to the DB. I looked at adbapi's implementation and noticed 
that it wasn't doing anything special to notice lost connections. Then I 
realized DBAPI2 doesn't actually specify a way to tell whether your 
connection has gone down.

I've been trying to think of a way to at least work around this on a 
per-app basis -- mine is using psycopg. It just raises either a 
ProgrammingError or an OperationalError on cursor.execute. The brightest 
idea we've come up with is to reconnect after N (~ 3) consecutive errors.

Any other ideas?

  Twisted | Christopher Armstrong: International Man of Twistery
   Radix  |          Release Manager,  Twisted Project
---------+           http://radix.twistedmatrix.com/
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