Django + Psycopg2: InterfaceError: only protocol 3 supported

Question

When loading pages in my Django + Postgresql setup I occasionally get this error but not all the time:

psycopg2 in connect

InterfaceError: only protocol 3 s

Answer 1

http://initd.org/psycopg/docs/connection.html#connection.protocol_version

You didn't provide a version of postgres you are using.
Seems it's older than 7.4. In that case a solution will be to upgrade version of postgres
(or install older version of psycopg, but i think it's not good)