Follow up on stale reads when using reasoning

Support Bug
1

Hi,

I'm following up on the issue where a query using reasoning will "lock up" and never return any new data.

https://groups.google.com/a/clarkparsia.com/forum/#!search/hmottestad/stardog/Tp7fBr4a4s0/sufRLMGHBgAJ

Cheers,
Håvard M. Ottestad

2

Hi Håvard,

Apologies for neglecting to let you know, but this problem appears to have been fixed in Stardog 4.2.3. Can you give your test case a try on 4.2.3 and see if you’re still able to reproduce?

Edit: As I crafted this response, the test I was running bombed out. Will continue to look into this issue…

3

Thanks Stephen. Great that you’ll keep looking into it. I do remember that the bug was more prominent the larger the Tbox.

Sometime last year I ran into a query performance issue with nested optionals.

{
    :A :prop1 ?c.
    OPTIONAL{
        ?c :prop2 ?d.
        OPTIONAL{
            ?d :prop3 ?e.
        }
    }
}

I had to rewrite them all to use unions, which still isn’t as performant as I would like. Mike said there was a planned improvement for this with changes to the join algorithms and he was hopeful that it would make it into 4.3 early this year.

Would you happen to know if it’s on schedule and if we can expect the release this month?

Cheers,
Håvard