[Dovecot] stale imap processes with 1.0.rc6 on FreeBSD

[Timo Sirainen]

On Thu, 2006-08-10 at 18:44 -0500, Jeremy C. Reed wrote:
> > On Thu, 2006-08-10 at 17:40 -0500, Jeremy C. Reed wrote:
> > > Was running dovecot-1.0.rc2 but many stale imap processes (only one user 
> > > of IMAP).
> > > 
> > > Switched to dovecot-1.0.rc6 but problem continued.
> > 
> > I don't really understand this problem.. Is this user using SSL? What if
> > you try the attached patch, does it change anything?
> 
> No ssl as far as I know. (I tried to explain in my previous email: no 
> imaps in protocols and not using stunnel for imaps for over week. Also 
> the end user said stopped using imaps over a week ago to make sure that 
> was not the problem.)

Oh. I thought you meant you used Dovecot SSL instead of stunnel to make
sure the problem wasn't with it, or something. :)

> > Could you get process traces and gdb backtraces from them? See
> > http://dovecot.org/bugreport.html#hangs
> 
> Attaching to program: /local/service/dovecot/libexec/dovecot/imap, process 
> 49042
> Reading symbols from /usr/lib/libc.so.4...done.
> Reading symbols from /usr/libexec/ld-elf.so.1...done.
> 0x2811d590 in kevent () from /usr/lib/libc.so.4
> (gdb) bt full
> #0  0x2811d590 in kevent () from /usr/lib/libc.so.4
> No symbol table info available.
> #1  0x80a8b20 in event_callback (context=0x80d8030)
>     at ioloop-notify-kqueue.c:41
>         ctx = (struct ioloop_notify_handler_context *) 0x80d8030
>         io = (struct io *) 0x16b
>         ev = {ident = 135045792, filter = 1, flags = 0, fflags = 
> 134910204, 
>   data = 135098368, udata = 0x80dd050}

So it's at least not in some infinite loop. What about ktrace, does it
show anything else than kevents?

Also, what do these commands say after attaching to gdb:

p *my_client
p *(struct file_istream *)my_client.input.real_stream
p *(struct file_ostream *)my_client.output.real_stream

And if I understood correctly, the same hangs happened even if you
didn't use --with-ioloop parameter at all, ie. it used poll?
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