Red Hat Bugzilla – Bug 506255
transitional configuration not correct in all cases in configuration change
Last modified: 2016-04-26 20:47:27 EDT
Description of problem:
> On Thu, Apr 09, 2009 at 10:12:43PM +0200, Andrew Beekhof wrote:
> > On Thu, Apr 9, 2009 at 20:49, Joel Becker <Joel.Becker at oracle.com> wrote:
> > > On Thu, Apr 09, 2009 at 01:50:18PM +0200, Andrew Beekhof wrote:
> > >> For added fun, a node that restarts quickly enough (think a VM) won't
> > >> even appear to have left (or rejoined) the cluster.
> > >> At the next totem confchg event, It will simply just be there again
> > >> with no indication that anything happened.
> > >
> > > ? ? ? ?This had BETTER not happen.
> > It does, I've seen it enough times that Pacemaker has code to deal with it.
> I'd call that a serious flaw we need to get fixed. I'll see if I can make it
> happen here.
That was pretty simple.
- set token to 5 minutes
- nodes 1,2,3,4 are cluster members and members of a cpg
- on node4: ifdown eth0, kill corosync, ifup eth0, start corosync
- nodes 1,2,3 seem completely unaware that 4 ever went away
When node 4 joins the cpg after coming back, the cpg on nodes 1,2,3 think that
a new fifth process/node is joining the cpg. The cpg on node 4 shows itself
being added as a new fourth cpg member.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
process doesn't see configuration change
process should see configuration change
can't break wire compatibility
just tried this with trunk (plus cpg ringid patch) and get the same results
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