[ovs-discuss] Crash in openvswitch 2.0.2

Marco Kuendig marco at nuvula.ch
Tue Mar 31 19:34:33 UTC 2015 

thanks Joe and Ben

have done:

1. installed dgb symbols for kernel....doesn't help
2. installed debug symbols for openvswitch

no change, gdb and crash still don't work for me. I'm not a dev, need more help to get that backtrace done.

here some output:

root at nuv-vir-kvm-server-1 ~ # crash  /usr/lib/debug/boot/vmlinux-3.13.0-48-generic /var/crash/_usr_sbin_ovs-vswitchd.0.crash

crash 7.0.3
Copyright (C) 2002-2013  Red Hat, Inc.
Copyright (C) 2004, 2005, 2006, 2010  IBM Corporation
Copyright (C) 1999-2006  Hewlett-Packard Co
Copyright (C) 2005, 2006, 2011, 2012  Fujitsu Limited
Copyright (C) 2006, 2007  VA Linux Systems Japan K.K.
Copyright (C) 2005, 2011  NEC Corporation
Copyright (C) 1999, 2002, 2007  Silicon Graphics, Inc.
Copyright (C) 1999, 2000, 2001, 2002  Mission Critical Linux, Inc.
This program is free software, covered by the GNU General Public License,
and you are welcome to change it and/or distribute copies of it under
certain conditions.  Enter "help copying" to see the conditions.
This program has absolutely no warranty.  Enter "help warranty" for details.

crash: /var/crash/_usr_sbin_ovs-vswitchd.0.crash: not a supported file format

Usage:

  crash [OPTION]... NAMELIST MEMORY-IMAGE  (dumpfile form)
  crash [OPTION]... [NAMELIST]             (live system form)

Enter "crash -h" for details.
root at nuv-vir-kvm-server-1 ~ # gdb /usr/sbin/ovs-vswitchd /var/crash/_usr_sbin_ovs-vswitchd.0.crash
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/sbin/ovs-vswitchd...Reading symbols from /usr/lib/debug//usr/sbin/ovs-vswitchd...done.
done.
"/var/crash/_usr_sbin_ovs-vswitchd.0.crash" is not a core dump: File format not recognized
(gdb) q
root at nuv-vir-kvm-server-1 ~ #



 <http://www.nuvula.ch/>
Marco Kuendig / CEO / Founder 
marco at nuvula.ch <mailto:marco at nuvula.ch> / +41 78 751 99 71

Marco's Google Hangout <https://plus.google.com/hangouts/_/nuvula.ch/marco>
Nuvula AG - Hybrid Clouds 
Weierbachstrasse 7b 8193 Eglisau Switzerland 
http://www.nuvula.ch <http://www.nuvula.ch/>
> On 31 Mar 2015, at 19:00, Joe Stringer <joestringer at nicira.com> wrote:
> 
> For the 'File format not recognized' problem, you might have better luck with the 'crash' utility.
> 
> $ crash <binary> <crashdump>
> 
> On 31 March 2015 at 08:16, Marco Kuendig <marco at nuvula.ch <mailto:marco at nuvula.ch>> wrote:
> Have tried this:
> 
> http://openvswitch.org/pipermail/discuss/2015-February/016582.html <http://openvswitch.org/pipermail/discuss/2015-February/016582.html>
> 
> this is the output, so doesn't seem to be correct:
> 
> root at nuv-vir-kvm-server-2 ~ # gdb /usr/sbin/ovs-vswitchd /var/crash/_usr_sbin_ovs-vswitchd.0.crash
> GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
> Copyright (C) 2014 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html <http://gnu.org/licenses/gpl.html>>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "x86_64-linux-gnu".
> Type "show configuration" for configuration details.
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/ <http://www.gnu.org/software/gdb/bugs/>>.
> Find the GDB manual and other documentation resources online at:
> <http://www.gnu.org/software/gdb/documentation/ <http://www.gnu.org/software/gdb/documentation/>>.
> For help, type "help".
> Type "apropos word" to search for commands related to "word"...
> Reading symbols from /usr/sbin/ovs-vswitchd...(no debugging symbols found)...done.
> "/var/crash/_usr_sbin_ovs-vswitchd.0.crash" is not a core dump: File format not recognized
> (gdb) bt
> No stack.
> (gdb) quit
> 
> any more hints please ?
> 
> thanks
> marco
> 
> 
>  <http://www.nuvula.ch/>
> Marco Kuendig / CEO / Founder 
> marco at nuvula.ch <mailto:marco at nuvula.ch> / +41 78 751 99 71 <tel:%2B41%2078%20751%2099%2071>
> Marco's Google Hangout <https://plus.google.com/hangouts/_/nuvula.ch/marco>
> Nuvula AG - Hybrid Clouds 
> Weierbachstrasse 7b 8193 Eglisau Switzerland 
> http://www.nuvula.ch <http://www.nuvula.ch/>
>> On 31 Mar 2015, at 17:00, Ben Pfaff <blp at nicira.com <mailto:blp at nicira.com>> wrote:
>> 
>> Can you get a backtrace for these?
>> 
>> On Tue, Mar 31, 2015 at 7:09 AM, Marco Kuendig <marco at nuvula.ch <mailto:marco at nuvula.ch>> wrote:
>> Folks,
>> 
>> any chance of having somebody look at these crash files ?
>> 
>> I have several servers that are loosing network connectivity because of this.
>> 
>> Downloads:
>> 
>> https://drive.google.com/file/d/0Bx_w1Tf2B5VSRU9yUmRpTDJLVEU/view?usp=sharing <https://drive.google.com/file/d/0Bx_w1Tf2B5VSRU9yUmRpTDJLVEU/view?usp=sharing>
>> 
>> Thanks for any hint or fix
>> 
>> marco
>> 
>> 
>> 
>> 
>>  <http://www.nuvula.ch/>
>> Marco Kuendig / CEO / Founder 
>> marco at nuvula.ch <mailto:marco at nuvula.ch> / +41 78 751 99 71 <tel:%2B41%2078%20751%2099%2071>
>> Marco's Google Hangout <https://plus.google.com/hangouts/_/nuvula.ch/marco>
>> Nuvula AG - Hybrid Clouds 
>> Weierbachstrasse 7b 8193 Eglisau Switzerland 
>> http://www.nuvula.ch <http://www.nuvula.ch/>
>> 
>> _______________________________________________
>> discuss mailing list
>> discuss at openvswitch.org <mailto:discuss at openvswitch.org>
>> http://openvswitch.org/mailman/listinfo/discuss <http://openvswitch.org/mailman/listinfo/discuss>
>> 
>> 
>> 
>> 
>> -- 
>> "I don't normally do acked-by's.  I think it's my way of avoiding
>> getting blamed when it all blows up."               Andrew Morton
> 
> 
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> discuss at openvswitch.org <mailto:discuss at openvswitch.org>
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> 
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