The Hermit Hacker writes:
> Pointers to what this is?  Do we have it documented anywhere?  Search
> engine, of course, is done, so can't search there ...
From experience, not from code knowledge, this happens when some backend
crashed and took the others with it and the postmaster is _recovering_
from that event (i.e., reinitializing).  Should go away in a few seconds,
normally.
-- 
Peter Eisentraut      peter_e@gmx.net       http://yi.org/peter-e/