Red Hat Bugzilla – Bug 742546
RFE: a better cycle breaking strategy
Last modified: 2017-08-31 17:46:53 EDT
+++ This bug was initially created as a clone of Bug #741115 +++
--- Additional comment from john.ellson on 2011-09-29 13:08:44 EDT
Why doesn't systemd detect cycles like this? It seems very fragile if this kind of bug in an unrelated service can make the system near unrecoverable because services like dbus and NetworkManager fail to start.
--- Additional comment from mschmidt on 2011-09-29 16:10:10 EDT
It does. It breaks cycles by dropping a (pretty much randomly selected) member of the cycle. In https://bugzilla.redhat.com/show_bug.cgi?id=741078#c3 I showed an example where dbus.socket was the unfortunate victim.
--- Additional comment from john.ellson on 2011-09-30 09:38:25 EDT
Isn't it a cycle in a directed graph? Shouldn't the strategy be to drop the lowest node in the cycle, rather than a random node ? Or perhaps drop the node with the least dependencies up to that point?
Somehow I think it should cause less damage than it did in this case.
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.
Some cycle-breaking suggestions in the upstream mailing list thread:
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