[Zope] Zope gets stuck

Hi guys, We've repeatedly encountered a weird situation where Zope gets stuck. Then, when we kill one of the Zope processes, it is released and answers requests. Has anybody encountered anything like this? I know this is a little short on information, but we are still trying to figure more ourselves. The stats: Zope version: Zope 2.2.5 (binary release, python 1.5.2, linux2-x86) Python version: 1.5.2 (#10, Dec 6 1999, 12:16:27) [GCC 2.7.2.3] System Platform: linux2 We're using Oracle and ZOracleDA too, but this time they seem not to be the culprits... Thanks, Shai.