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From Alex Karasulu <akaras...@apache.org>
Subject Re: ExceptionInterceptor and undue lookup
Date Thu, 06 Jan 2011 20:56:31 GMT
On Thu, Jan 6, 2011 at 7:35 PM, Emmanuel Lecharny <elecharny@gmail.com>wrote:

> Hi,
>
> following my previous mail, I have a bit more insight about the problem.
>
> When we do a search, we not only give a base DN, but also a filter and a
> scope. Now, there are a few possibilities :
> 1) We have entries under the base DN, accepted by the filter and the scope
> 2) We have entries under the base DN, but the filter and the scope discard
> all of them, thus returning no entries
> 3) The base DN is not a DN in the DIT, the filter and scope are not even
> used, thus generating a NO_SUCH_OBJECT result.
>
> The ExceptionInterceptor extra lookup is just checking the third case. We
> can't handle this case in the SearchHandler, because the candidate have
> potentially been ruled out by the filter and the scope, and we can't anymore
> make a distinction between case #2 and case #3.
>
> That left us with the second option : modifying the cursor implementation
> so that we now if there are some candidates (and we must leverage the DN
> index for that. It probably requires some complex modification in the Cursor
> API and the backend, some parts I'm not familiar with.
>
> I'm going to create a JIRA with those informations, and we will try to fix
> that later. It's not urgent...


Yeah if it's a performance issue then we can tackle it after we get 2.0.0-M1
out the door.

-- 
Alex Karasulu
My Blog :: http://www.jroller.com/akarasulu/
Apache Directory Server :: http://directory.apache.org
Apache MINA :: http://mina.apache.org
To set up a meeting with me: http://tungle.me/AlexKarasulu

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