bug#18728: 24.0.50; gnus hangs while reading mail from imap server

[Ted Zlatanov]

On Wed, 15 Oct 2014 07:56:20 +0900 tsugutomo.enami@jp.sony.com wrote: 

te> The gnus hangs while reading mail from imap server on startup, with
te> displaying "nnimap read NNNNNNk" in mini buffer.  The amount of NNNNNN
te> was about 200Mbytes.
...
te> The work around for me was adding code to ignore above NOOP lines in
te> nnimap-wait-for-response, as follows:

te> --- nnimap.el.orig  2011-06-01 09:27:58.000000000 +0900
te> +++ nnimap.el       2014-10-14 13:56:31.000000000 +0900
te> @@ -1683,7 +1689,8 @@
te>                     (while (and (not (bobp))
te>                                 (progn
te>                                   (forward-line -1)
te> -                                 (looking-at "\\*"))))
te> +                                 (or (looking-at "\\*")
te> +                                     (looking-at "[0-9]+ OK NOOP")))))
te>                     (not (looking-at (format "%d .*\n" sequence)))))
te>         (when messagep
te>           (nnheader-message 7 "nnimap read %dk" (/ (buffer-size) 1000)))


te> I guess the NOOP lines are response for the NOOP command sent to keep a
te> connection.  The gnus version used here is rather old but, at a glance,
te> the function in upstream repository is almost same.

Could you prepare a patch against Emacs trunk or (preferably) Gnus
master[1], incorporating Andreas' suggestion and with a ChangeLog entry?
I'll apply it to Gnus master and it will make its way to Emacs trunk
shortly thereafter.

Thanks
Ted

[1] http://git.gnus.org/