Bug#717338: Questions
Hi Diane,
Am Montag, 12. August 2013, 20:08:17 schrieb Diane Trout:
> > Yep, I found this bug before submitting mine. But re-adding the feeder
> > doesn't help.
> > I tried the debugger a few days ago, but it flooded me with text. I don't
> > know much about the correct behaviour of nepomuk/akonadi, so I
> > would appreciate a hint for search. I will give it a try on weekend and
> > post if I can identify any (for me) special output.
>
> The akonadiconsole was a long-shot.
>
> I can only occasionally figure out what its doing.
>
> I managed to find nepomukpimindexerutility and was able to run it without
> getting an error.
>
> From your log messages, the line that seems wrong is the "SQLErrorDirect
> failed on query 'sparql delete...'. The only place I can find code that
> looks like it generates that delete query is at:
>
> http://sources.debian.net/src/nepomuk-core/4:4.10.5-1/services/storage/resou
> rcemerger.cpp?hl=775#L775
>
> That led me to wonder about the nepomuk configuration.
>
> I found a ~/.kde/share/apps/nepomuk/repository/main/data/virtuosobackend
> directory that has a soprano-virtuoso.log file. That might have something
> interesting?
No, just a hint about "wildcard needs at least 4 leading characters."
>
> There's also ~/.kde/share/config/nepomukserverrc
>
> for me one of the more useful sections is:
>
> [main Settings]
> Maximum memory=50
> Storage Dir[$e]=$HOME/.kde/share/apps/nepomuk/repository/main/
> Used Soprano Backend=virtuosobackend
My settings were:
[main Settings]
Maximum memory=1000
Storage Dir[$e]=$HOME/.kde/share/apps/nepomuk/repository/main/
Used Soprano Backend=virtuosobackend
index version=2
rebuilt index for type indexing=true
Deleting the nepomuk database and changing the settings does not help.
My new settings are:
[main Settings]
Maximum memory=500
Storage Dir[$e]=$HOME/.kde/share/apps/nepomuk/repository/main/
Used Soprano Backend=virtuosobackend
> There are other supposedly other soprano backends, but I think everything
> but virtuoso is supposed to be currently broken.
>
> Out of curiosity, does this command work? Its a simple count of RDF objects
> IDs virtuoso.
>
> sopranocmd --socket `kde4-config --path socket`nepomuk-socket --model main \
> --nrl query 'select count(?s) where { ?s ?p ?o }'
>
> For me after running that I get:
> callret-0 -> "1205164"^^<http://www.w3.org/2001/XMLSchema#int>
> Total results: 1
> Execution time: 00:00:00.194
callret-0 -> "964900"^^<http://www.w3.org/2001/XMLSchema#int>
Total results: 1
Execution time: 00:00:00.171
> kmail2 works by letting akonadi manage resources and nepomuk index data.
> Nepomuk uses soprano as an interface to the RDF data format. soprano is
> storing data in a virtuoso database.
>
> Akonadi is also storing data (by default) in a mysql database hidden in
> ~/.local/share/akonadi.
I deleted and rebuilded the akonadi database 3 weeks ago with no difference.
> To me it seems like your error message is implying some configuration
> information isn't being set up correctly for the delete query.
I can imagine, that it is a configuration error.
But where should I start searching?
I deleted akonadi files, nepomuk files with no difference.
If something is wrong with the sparql command or the RDF stuff,
where are the data stored? What should I check?
"No FROM GRAPH IDENTIFIED BY clause and no default graph specified"
gives a hint for a problem within my installation. But how can I change the
sql clause or define a default graph?
Greetings
Volker Groll
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