Hi Cédric,
sometimes our Virtuoso server segfaults on a sparql query.
When we were using version 6.1.2, the error on the log was:
09:24:48 GPF: bitmap.c:1552 next/prev of non-valid bit pos
With version 6.1.3, the error is now:
12:35:34 Invalid bit position on index: RDF_QUAD_POGS
12:35:34 GPF: bitmap.c:1606 next/prev of non-valid bit pos
Any idea of what the problem could be ?
I believe this issue is fixed in the 6.1.4 release we just announced
earlier this week.
I suggest you first upgrade to 6.1.4
then you should run the following two statements on your database
using the isql tool:
select count (*) from RDF_QUAD table option (index primary key)
select count (*) from RDF_QUAD table option (index RDF_QUAD_POGS)
These counts should match, else you may need to drop the index and re-
create it:
drop index RDF_QUAD_POGS;
create bitmap index RDF_QUAD_POGS on RDF_QUAD (P, O, G, S)
partition (O varchar (-1, 0hexffff))
Let me know if this solves your problem.
Patrick
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OpenLink Software
