Package: python3.13 Version: 3.13.5-1 Severity: serious Hi,
Python 3.13 is affected by this bug, referenced upstream: https://github.com/python/cpython/issues/130327 The result is, in some cases, an object is garbage collected even if there is a reference to it in a program. The consequence for OpenStack Nova (ie: compute) is that spawning a VM simply does not work. Here's the Nova bug entry: https://bugs.launchpad.net/nova/+bug/2103413 This happens when Nova (OpenStack compute) tries to get credential from Keystone (OpenStack auth) to talk to Neutron (OpenStack network), in order to create a network port. It fails to get such credentials, as the object keystoneauth1.session.SessionClient is garbaged collected due to the bug in CPython. This is only a single identified instance of the bug in Nova, though it is very probable that we have this kind of troubles with many other Python code in Trixie. Stefano identified (bisected) the issue to this commit: https://github.com/python/cpython/commit/c32dc47aca6e8fac152699bc613e015c44ccdba9 and a possible patch could be this one: https://github.com/python/cpython/pull/130469/files This patch hasn't been tested (yet). I hope my bug report is detailed enough. To me, this is a grave RC bug that must be fixed before the Trixie release. I'm in fact, *VERY* happy that we have finally discovered what was going on in Nova and OpenStack, I was desperating to find out. It looks like I'll only need to upload the latest Eventlet to fix the remaining troubles when this CPython bug if fixed (more about this later on in another bug entry...). Cheers, Thomas Goirand (zigo)
