[ovs-discuss] Crash in openvswitch 2.0.2

Tue Mar 31 19:45:54 UTC 2015

Typically Ubuntu does not unpack the crashes. Can you try apport-unpack?
# apport-unpack /var/crash/<name> <crash-dir>

On Tue, 31 Mar 2015, Marco Kuendig wrote:

> 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 ~ #
> 
> 
> 
> Nuvula AG
> 
> Marco Kuendig / CEO / Founder 
> marco at nuvula.ch / +41 78 751 99 71
> 
> Marco's Google Hangout
> 
> Nuvula AG - Hybrid Clouds 
> Weierbachstrasse 7b 8193 Eglisau Switzerland 
> 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> wrote:
>       Have tried this:
> 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>
> 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...(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
> 
> 
> Nuvula AG
> 
> Marco Kuendig / CEO / Founder 
> marco at nuvula.ch / +41 78 751 99 71
> 
> Marco's Google Hangout
> 
> Nuvula AG - Hybrid Clouds 
> Weierbachstrasse 7b 8193 Eglisau Switzerland 
> http://www.nuvula.ch
> 
>
>       On 31 Mar 2015, at 17:00, Ben Pfaff
>       <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> 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
> 
> Thanks for any hint or fix
> 
> marco
> 
> 
> 
> 
> Nuvula AG
> 
> Marco Kuendig / CEO / Founder 
> marco at nuvula.ch / +41 78 751 99 71
> 
> Marco's Google Hangout
> 
> Nuvula AG - Hybrid Clouds 
> Weierbachstrasse 7b 8193 Eglisau Switzerland 
> http://www.nuvula.ch
> 
> 
> 
> _______________________________________________
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> discuss at openvswitch.org
> 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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> 
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> 
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