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[fbriere@abacom.com: Bug#77793: dnrd: sits in infinite loop]   Message List  
Reply | Forward Message #170 of 261 |
Re: [dnrd] [fbriere@...: Bug#77793: dnrd: sits in infinite loop]

On Sat, Nov 25, 2000 at 08:05:19AM -0500, Brad Garcia wrote:
> I would suggest compiling dnrd with debugging (-g) turned on, and the
> next time it happens attach gdb to it (gdb dnrd <pid>) and then get a
> backtrace on all threads (thread apply all bt)

Well, that was fast; as soon as dhclient restarted dnrd, it happened
again. Seems to me that select() keeps failing, but I don't see
anything in my logs...

Here's a typical backtrace:

#0 0x400ba5ed in close () from /lib/libc.so.6
#1 0x40020292 in close () from /lib/libpthread.so.0
#2 0x400c2fe7 in vsyslog () from /lib/libc.so.6
#3 0x400c2def in vsyslog () from /lib/libc.so.6
#4 0x804a638 in log_msg (type=3, fmt=0x8050d26 "select returned %s")
at common.c:131
#5 0x804e719 in run () at relay.c:187
#6 0x804c1b4 in main (argc=5, argv=0xbffff9e4) at main.c:319

The libc half of it keeps changing, but the three lowermost steps are
constant.


I've put dnrd to sleep, instead of killing it; let me know if you'd like
me to set breakpoints, print variables, etc.

--
Frederic Briere <fbriere@...> [hyrule.dyndns.org]
The second piece of paper was much easier to get. Hmm.
"Well, at least I'm not HUNGARIAN!" // "That is so low."



Tue Nov 28, 2000 9:49 pm

fbriere@...
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Message #170 of 261 |
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Do you have any idea what could be done about this? ... Subject: Bug#77793: dnrd: sits in infinite loop Reply-To: Frederic Briere <fbriere@...>,...
Thomas Schoepf
schoepf@...
Send Email
Nov 23, 2000
11:46 pm

... What about running it in debugging mode & posting the outputs? I know of quite a bunch of race conditions and minor bugs in the dnrd-sources, so it would...
Rainer Weikusat
weikusat@...
Send Email
Nov 24, 2000
9:04 am

I have never observed this behavior. I would suggest compiling dnrd with debugging (-g) turned on, and the next time it happens attach gdb to it (gdb dnrd...
Brad Garcia
garsh@...
Send Email
Nov 25, 2000
12:01 pm

... I never tried to debug a running program before; guess it's time I learned something new. :) My original plan was to run it in foreground (with -d), kill...
Frederic Briere
fbriere@...
Send Email
Nov 26, 2000
7:58 am

... Well, that was fast; as soon as dhclient restarted dnrd, it happened again. Seems to me that select() keeps failing, but I don't see anything in my...
Frederic Briere
fbriere@...
Send Email
Nov 29, 2000
9:02 pm

... Make sure you have syslog setup to save these messages. It's trying to print out the error code returned by select, and that would be very useful when...
Brad Garcia
garsh@...
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Nov 29, 2000
9:36 pm
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