[Dovecot] 1.1.6 -> 1.1.7 regression: dovecot: pipe() failed: Too many open files

[Mark Zealey]

> >  There weren't amazing numbers of imap sessions open at
> > the time (only something like 400-500; we've had 1.5k in 
> the past), so I
> > suspect this is a regression between 1.1.6 and 1.1.7 where 
> you've got a
> > leak of fd's ? 
> 
> Sounds like a leak, but I doubt it was a regression. Probably you just
> hit a rare condition.

Yeah I've not seen it happen again since 23rd Dec...

Mark