virtuoso-t constantly segfaulting

[Kevin Krammer]

On Monday, 2014-01-27, 18:30:20, Thomas Tanghus wrote:
> On Monday 27 January 2014 09:44 Kevin Krammer wrote:
> > On Monday, 2014-01-27, 00:19:13, Thomas Tanghus wrote:
> > > On Sunday 26 January 2014 23:48 Kevin Krammer wrote:
> > > > On Sunday, 2014-01-26, 23:42:12, Thomas Tanghus wrote:
> > > > > The past week or so I get this every 10-20 seconds
> > > > > in/var/log/syslog:
> > > > > 
> > > > > kernel: [168098.800123] virtuoso-t[13981]: segfault at ffffffff ip
> > > > > 0851efbb
> > > > > sp a7143870 error 7 in virtuoso-t[8048000+aa0000]
> > > > 
> > > > Can you check if virtuoso is running as more than one user, maybe as a
> > > > system daemon?
> > > 
> > > $ ps aux|grep virtuoso
> > > tol      15621  0.0  3.2 285344 266420 ?       RNl  00:08   0:00
> > > /usr/bin/virtuoso-t +foreground +configfile /tmp/virtuoso_lY1670.ini
> > > +wait
> > 
> > Is that the PID that is then logged in syslog? I.e. is that the virtuoso
> > crashing sometime later?
> 
> It doesn't seems so. The PID keeps incrementing both the ones in the process
> list and the ones crashing, but they don't seem to be the same.

Strange.

> BTW, the crashing stops if I disable Akonadi Nepomuk Feeder, so I guess it's
> somewhat Akonadi related. Or at least the data Akonadi stores in Nepomuk.

I see. Maybe it is just the only program writing data into Nepomuk.

> > I have no idea on how virtuoso works, but from the posted commandline I'd
> > say one thing you could try is to start it manually.
> 
> As the processes keep crashing and removing the /tmp/virtuoso_XXXXXX.ini I
> grabbed one of the ini files and saved it locally:

[snip]

> I then shut down Nepomuk from System Settings->Desktop Search and ran:
> 
>   /usr/bin/virtuoso-t +foreground +configfile ./virtuoso.ini +wait
> 
> Which gave:
> 
>                Mon Jan 27 2014
> 18:21:47 OpenLink Virtuoso Universal Server
> 18:21:47 Version 06.01.3127-pthreads for Linux as of Sep 24 2013
> 18:21:47 uses parts of OpenSSL, PCRE, Html Tidy
> 18:21:47 Database version 3126
> 18:21:47 Entering Lite Mode
> 18:21:47 SQL Optimizer enabled (max 1000 layouts)
> 18:21:49 Compiler unit is timed at 0.001117 msec
> 18:21:50 Roll forward started
> 18:21:50 Roll forward complete
> 18:21:50 Checkpoint started
> 18:21:51 Checkpoint finished, log reused
> 18:21:53 Server online at 7486 (pid 14844)
> 
> And then nothing until I closed it by Ctrl-C. No crashes, nothing in syslog.

Seems to be triggered by something accessing virtusos then.
Hard to debug :(
Maybe if you run nepomukserver in a terminal/shell, probably running 
akonadictl start in a second?

Maybe one of the processes involved logs something of interest to 
stdout/stderr.

Other than that I've run out of ideas. Don't know much about the 
Nepomuk/Virtuoso part.

Cheers,
Kevin

-- 
Kevin Krammer, KDE developer, xdg-utils developer
KDE user support, developer mentoring
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 190 bytes
Desc: This is a digitally signed message part.
URL: <http://mail.kde.org/pipermail/kde/attachments/20140128/545e8162/attachment.sig>
-------------- next part --------------
___________________________________________________
This message is from the kde mailing list.
Account management:  https://mail.kde.org/mailman/listinfo/kde.
Archives: http://lists.kde.org/.
More info: http://www.kde.org/faq.html.