Re: Annoying issue with group not showing new messages

[Eric Abrahamsen <eric@ericabrahamsen.net>]

Luis Henriques <henrix@camandro.org> writes:

> On Fri, Feb 19, 2021 at 07:50:43AM -0500, dick.r.chiang@gmail.com wrote:
>> One cannot practically use gnus without stepping through functions.  This is
>> why mu4e has effectively halted new gnus adoption.
>> 
>> Send yourself a mail to a good inbox.  `C-u C-M-x` on
>> `nnimap-request-group-scan`.  Then `M-g` on the group, and SPC step to see how
>> it's supposed to look.
>> 
>> Now do the same for the problematic inbox.  Inspect variables and function
>> calls with `e variable-or-function-call RET`.
>> 
>> `C-M-x` on `nnimap-request-group-scan` to turn off debugging.
>> 
>> This general strategy holds you in good stead for your entire
>> emacs lifetime.  Google around for more (onerously longwinded) info.
>
> Thank you for your suggestion.  Unfortunately, I tried that... and gave
> up.  I'm not (e)lisp literate so debugging such complex code isn't
> something I'm ready to do.  And no, I'm not moving to mu4e :-)

Something that works sometimes with nnimap is to edit the full group
parameters ("G E"), and just blast all the mark information, maybe the
active cons as well. That would be the third and fourth elements of the
list -- I think you can just replace them with nil, though it's been a
while since I had to do this. That should trigger a full initial sync of
the group, which usually flushes out the kinds of problems you're
seeing.

No promises! But it's worth trying.

Eric