Re: gnus makes emacs lose response

[Leon <sdl.web@gmail.com>]

Ralf Angeli <angeli@iwi.uni-sb.de> writes:

> * Ralf Angeli (2006-04-07) writes:
>
>> * Kim F. Storm (2006-04-06) writes:
>>
>>> then examine the stack and other stuff to see
>>> where it hangs, e.g. as a first step, send us
>>> the output from these commands:
> [...]
>> (gdb) bt
>> #0  0xffffe410 in __kernel_vsyscall ()
>> #1  0xa77f7d2d in select () from /lib/tls/i686/cmov/libc.so.6
>> #2  0x0819228b in wait_reading_process_output (time_limit=0, microsecs=100000, 
>>     read_kbd=0, do_display=0, wait_for_cell=137558217, wait_proc=0x8b7ada8, 
>>     just_wait_proc=0) at process.c:4494
>> #3  0x08193f5a in Faccept_process_output (process=146255276, seconds=0, 
>>     millisec=100, just_this_one=137558217) at process.c:3893
> [...]
>> Lisp Backtrace:
>> "accept-process-output"
>> "imap-wait-for-tag"
>> "nnimap-retrieve-groups"
>> "gnus-retrieve-groups"
>
> Is there anything else I can do to help debugging this?
>
> I don't have the original report, so I don't know under which
> circumstances the hang happens there.  In my case it happens if I
> connect to the internet via modem, open an encrypted connection to an
> IMAP server, cut the internet connection, connect to the internet
> again, and try to connect to the IMAP server again.  I am not sure if
> this is a problem of Emacs, the programs used for opening the
> connection to the server, or the kernel.  I tried it now with openssl
> s_client, starttls, and gnutls-cli.  All three behave identically on
> GNU/Linux, i.e. the hang happens with all of them.
>
> BTW, in contrast to Emacs on GNU/Linux, the Windows port of Emacs does
> not hang.  Perhaps this information helps identifying the cause.

Hi Ralf,

Here are steps to reproduce the bug.

1. Add the following lines to ~/.gnus.el
    (gnus-demon-add-handler 'gnus-group-get-new-news 2 t)
    (gnus-demon-init)
2. fire up gnus
3. cut the network

Then when demon tries to get new News, emacs hangs. What's outrageous is
Ctrl-g won't be able to stop the process.

If you put the network back on, emacs will come to life again.

Regards,
-- 
Leon
Emacs: GNU Emacs 23.0.0.1 (i686-pc-linux-gnu, GTK+ Version 2.8.17) of
2006-04-18