[Sqlalchemy-tickets] Issue #4225: MySQL error 1047 should be handled as disconnect (zzzeek/sqlalchemy)

[Andras K. <iss...@bi...>]

New issue 4225: MySQL error 1047 should be handled as disconnect
https://bitbucket.org/zzzeek/sqlalchemy/issues/4225/mysql-error-1047-should-be-handled-as

Andras Kovi:

It seems like WSREP errors can cause #3497 to reappear.

Example error: InternalError: (1047, u'WSREP has not yet prepared node for application use')

The error was produced in a HA testing environment where the Galera cluster was being being bombarded with errors. The connecting Openstack Mistral service correctly identified the disconnect errors 2013, but seems to have missed the 1047 which caused erroneous connections stay in the pool.