Frank Tegtmeyer wrote:
Hi,
the ZPatterns list seems to be misconfigured - I cannot reach the list or someone at eby-sarna.com. So I post my problem here:
Today we got online with a customer site and unfortunately instantly got a problem with ZPatterns or TransactionAgents, I don't really know.
The site is quite heavily used - 40000 users that got a registration this night try to change their username and password now. All works very well and fast.
The problem is that the Zope process dies once in a while - a while varies from 20 seconds to 20 minutes. I saw a relationship between login tries (login form) and the Zope process dying. Unfortunately this happens randomly - always when Zope dies shortly before that somebody tried a login. At the other side many logins work without Zope dying.
Frank, try starting Zope up single-threaded ( -t 1 ) and see if that helps; I'm nervous about a potential problem with the MySQLDA C libraries having thread-local data and switching threads leading to instability. We've had one customer who 'made the problems go away' when they ran single-threaded Zope.