Posting to my university's nntp server hangs

[Tassilo Horn <tsdh@gnu.org>]

Hi all,

since some time, whenever I post to a group on my university's nntp
server, Gnus hangs with the last message being:

  Sending news via Uni using nntp...

The news server is this:

--8<---------------cut here---------------start------------->8---
% telnet newshost 119
Trying 141.26.64.5...
Connected to newshost.
Escape character is '^]'.
200 cache.uni-koblenz.de InterNetNews NNRP server INN 2.4.2 ready (posting ok).
Connection closed by foreign host.
--8<---------------cut here---------------end--------------->8---

I can hit C-g (below is a backtrace I got with that and debug-on-quit)
to resolve the hang, and checking the group again, I can see that the
message arrived there anyhow.  But of course the C-g prevented it from
being added to my local archive group.

--8<---------------cut here---------------start------------->8---
Debugger entered--Lisp error: (quit)
  signal(quit nil)
  byte-code("\b\204\a.\301 \210\302\303\304\"\207" [debug-on-quit nntp-close-server signal quit nil] 3)
  byte-code("\306\b	\n#\210\v\205.\0\307\v\310\311#.\312\216\310\313\314\217.*\310\207" [-group -server -connectionless nntp-connection-timeout -timer nntp-with-open-group-internal nntp-possibly-change-group run-at-time nil #[nil "\b.\n	;\203.\0\306	!\202.\0	\307\211.\x1c.\x1d.\2037.\r\211A.\242\211.\2037.	\v\211A@\262.=\203.\0\v@.\307\211.\204.\0\f\205S.\310\f!\311>\203G.\f\202S.\312\313\f!!\210\314\v\n\".\307-\211.\x0f\205^.\313.\x0f!\211.\x10\205q.\315.\x10!\316=\205q.\312.\x10!*\207" [nntp-server-buffer buffer nntp-connection-alist entry process alist get-buffer nil process-status (open run) nntp-kill-buffer process-buffer delq buffer-size 0 -process -buffer] 5] ((byte-code "\b\203\b.\301\b!\210\301\207" [-timer nnheader-cancel-timer] 2)) (funcall -bodyfun) ((quit (byte-code "\b\204\a.\301 \210\302\303\304\"\207" [debug-on-quit nntp-close-server signal quit nil] 3)))] 4)
  nntp-with-open-group-function(nil "Uni" nil #[nil "\306\307C.\x19\n\204.\0\v\204.\0\310\f!\210\311\312\b\313#.\f.../..;\203).\314..!\202+.\x0e.\315\211.0.1...2.2\203`.\x0e2\211A.2\242\211.0\203`.\x0e..0\211A@\262.=\2035.\x0e0@.1\315\211.2\204:.\x0e1\205\203.\316.1!\317>\203s.\x0e1\202\203.\320\321.1!!\210\322.0./\"./\315-\211.1\205\216.\321.1!\211..\205\233.r..q\210`).3.1\203\203.\r.4.5\f	\n\315.6.7.\x1e..8.9.\x0e..../..;\203\312.\314..!\202\314.\x0e.\315\211.0.1...2.2\203.\x01.2\211A.2\242\211.0\203.\x01...0\211A@\262.=\203\326.\x0e0@.1\315\211.2\204\333.\x0e1\205$.\316.1!\317>\203.\x01.1\202$.\320\321.1!!\210\322.0./\"./\315-\206,.\323..!\211.1\203I.\x0e:\204B.\n\204B.\310\321.1!!\210\324\325\326\217\202O.\327\330\331.9#.\b	\204\211.\x0e;\204\211.\x0e<.=>\204\211.\332 \210r..q\210.3b\210\333\334.!!\203\x7f.\x0e3\335y\210\336 |\210)\202\211.\327\330\337.4#..\205\331.r\fq\210.>)\315.?\211.@\203\321.\340\341.@\"\203\321.\342\335.@\".?eb\343\344\315\345#\203\274.`S\202\275.d}\210\346\347!\204\317.eb\210\350.?\351\261.\210~\210\352\353!\210\354\355!*\207" [strings wait-for nnheader-callback-function nntp-inhibit-output nntp-server-buffer command "^[23].*.?\n" "POST" nntp-erase-buffer mapconcat identity " " get-buffer nil process-status (open run) nntp-kill-buffer process-buffer delq nntp-open-connection err (byte-code "\b\203*.	\b.\x19\306 .\n.\r\203.\0\307\n!\210\310	\n.1P\"\210\311	!\312>\206(.\313\314!*\210.2\315=\2033.\316\207.2\203K.\x0e3\203K.\317	.3.4.5.2%\210\316\207.3\203Q.	.3.4.5\320.6.5.4.3.r\321	!q\210eb\210`f\322>\203w.\323\324!\203\271.\311	!\325>\203\271.\323\326!\203\214.\327	!\210\202\257.\323\330!\203\242.\331\332\333\334\335N#\210\336\334\320\"\210\202\257.\323\337!\203\257.`\340y\210`|\210\341	!\210eb\210\202j.\323\342!\203\306.\343 \210\320\202F.\311	!\344>\204\324.\313\314!\202F.db\210e\320.7.8\345.3.8\316#\204\370.\341	!\210d\346Ze].8db\210\202\335.\347\350!.7r.9q\210.7.:+\351.5?!\210.6\204E.r.4q\210db\210.;\203/.r\321	!q\210\352\353 !)c\210\2027.\354\321	!\320\211#\210.<\203D.\320.<\355\356\357\"\210)\316.6\204N.\360 \210..\207\316\207" [command process string nntp-last-command-time nntp-last-command nntp-record-commands current-time nntp-record-command process-send-string process-status (open run) nntp-report "Server closed connection" ignore t nntp-async-wait nil process-buffer (50 51 52 53) looking-at "48[02]" (open run) "480" nntp-handle-authinfo "482" nnheader-report nntp "%s" nntp-authinfo-rejected error-message signal "^.*\n" 1 nntp-accept-process-output "[45]" nntp-snarf-error-message (open run) re-search-backward 1000 match-string 0 nntp-decode-text mm-string-to-multibyte buffer-string insert-buffer-substring nnheader-message 5 "" erase-buffer nntp-end-of-line ...] 6) ((nntp-authinfo-rejected (byte-code "\301\302\bA\"\207" [err signal nntp-authinfo-rejected] 3)) (error (byte-code "\302\303\304\b	$\207" [address err nnheader-report nntp "Couldn't open connection to %s: %s"] 5)) (quit (byte-code "\300\301!\210\302\303\304\"\210\304\207" [message "Quit retrieving data from nntp" signal quit nil] 3))) nnheader-report nntp "Couldn't open connection to %s" nntp-accept-response looking-at regexp-quote 1 point-at-bol "Couldn't open connection to %s." string-match "^[23].*\\(<[^	\n @<>]+@[^	\n @<>]+>\\)" match-string search-forward "\n\n" t mail-fetch-field "Message-ID" "Message-ID: " "\n" run-hooks nntp-prepare-post-hook nntp-send-buffer "^[23].*\n" buffer nntp-connection-alist entry process ...] 8])
  nntp-request-post("Uni")
  gnus-request-post((nntp "Uni" (nntp-address "news.uni-koblenz.de")))
  message-send-news(nil)
  message-send-via-news(nil)
  message-send(nil)
  message-send-and-exit(nil)
  call-interactively(message-send-and-exit nil nil)
  command-execute(message-send-and-exit)
--8<---------------cut here---------------end--------------->8---

I'm using the current Git version of Gnus.  I'm happy to provide further
information or debug whatever you want.

Bye,
Tassilo