[Dovecot] Re: Hang in 1.0.alpha4

[Mark Plaksin]

Mark Plaksin <happy at usg.edu> writes:

> Mark Plaksin <happy at usg.edu> writes:
>
>> No such luck.  It just hang.  Everything (truss, rawlog, client log) looks
>> the same as before.  Here's the end of the debug output that the hang-debug
>> patch added:
>
> ...
>
>> imap(happy): Warning: buffer_flush=1, flush_pending=0
>> imap(happy): Warning: cork changed, set=1, io=0
>> imap(happy): Warning: func -> command_pending=1
>> imap(happy): Warning: _flush_pending -> 1
>> imap(happy): Warning: cork changed, set=0, io=0
>> imap(happy): Warning: buffer_flush=0, flush_pending=1
>> imap(happy): Warning:  - adding2
>
> I can now reproduce a hang at will by simulating an IMAP client running the
> commands from the rawlog.in corresponding to a hang.  The hang-debug and
> truss output is slightly different from before.  The debug output is below.
> Let me know if you need the truss output too (I can't tell how much of it
> would be useful; it's too big to post the whole thing).
>
> imap(happy): Warning: cork changed, set=0, io=0
> imap(happy): Warning: buffer_flush=1, flush_pending=0
> imap(happy): Warning: cork changed, set=1, io=0
> imap(happy): Warning: cork changed, set=0, io=0
> imap(happy): Warning: buffer_flush=1, flush_pending=0
> imap(happy): Warning: func -> command_pending=1
> imap(happy): Warning: _flush_pending -> 1
> imap(happy): Warning:  - adding

And, FWIW, the hang happens with both mbox and maildir.  I was using mbox
until last Friday when I switched to maildir.  This morning I had a hang
with maildir which produced this debug output:

imap(happy): Warning: buffer_flush=1, flush_pending=0
imap(happy): Warning: cork changed, set=1, io=0
imap(happy): Warning: cork changed, set=0, io=0
imap(happy): Warning: buffer_flush=1, flush_pending=0
imap(happy): Warning: cork changed, set=1, io=0
imap(happy): Warning: func -> command_pending=1
imap(happy): Warning: _flush_pending -> 1
imap(happy): Warning: cork changed, set=0, io=0
imap(happy): Warning: buffer_flush=0, flush_pending=1
imap(happy): Warning:  - adding2