http://www.slony.info/bugzilla/show_bug.cgi?id=129

--- Comment #1 from Steve Singer <ssinger at ca.afilias.info> 2010-06-03 14:55:52 PDT ---
What I think is happening is as follows

If more than one node is a direct subscriber of the node being failed over then
slonik will find the node with the most recent sync and call failedNode2() on
it.

failedNode2() will post an ACCEPT SET event which will have to propogate for
the failover to finish.

If you do a 

failover(.....)

slonik will finish before the ACCEPT SET event is processed.

but if you do a 

failover(....)
wait for event (......)

and there isn't more than one direct subscriber then failedNode2() doesn't get
called an no ACCEPT SET event is posted.  further more the wait for event()
will fail because there is no event to wait for.

I think the solution from a slonik scripting point of view is to do
failover(....)
sync(id=new_origin)
wait for event(....)

the sync will ensure there is always an event to wait for.   This seems a bit
convoluted though and isn't documented clearly.   

I wonder if we can make this simpler somehow

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