[Christian Theune] > It looks like we have been bitten by a bug in a C-Module for MySQL > access. Sometimes it led to a segfault, a halt, or the hang. We can't > reproduce it after switching that C-Module anymore.
Any theory for how that could make all four threads appear to be blocked on an attempt to get the commit lock? Bad code at the C level can cause any kind of "impossible" behavior, but there's usually a more-or-less clear connection to the impossible symptom observed. Without such a connection, it remains plausible that, e.g., some _other_ bad C-level code is really at fault, and switching an irrelevant bit of C code just happened to mask it for the time being. > I really hate C-Modules for Python right now. They're no worse than C code written for other purposes. I just noticed that doing a Google search on mysql segfault gives over 200000 hits. That's about average for C code <wink>. _______________________________________________ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev