[Mondrian] VFS issue

Matt Campbell mkambol at gmail.com
Fri Jul 17 15:08:54 EDT 2009


I did do a fair amount of searching when we first encountered this problem
and couldn't find much helpful information at all.  When I get a chance I'll
see if there is a newer version of VFS.

On Fri, Jul 17, 2009 at 2:25 PM, Julian Hyde <jhyde at pentaho.com> wrote:

>  Has anyone done a google search for the issue you are experiencing? Is
> there a newer version of VFS that might fix the problem?
>
> Will, what was the other technology you used?
>
> I'm OK with switching technology as long as it doesn't break existing apps.
>
> Julian
>
>  ------------------------------
> *From:* mondrian-bounces at pentaho.org [mailto:mondrian-bounces at pentaho.org]
> *On Behalf Of *Matt Campbell
> *Sent:* Friday, July 17, 2009 8:16 AM
> *To:* Mondrian developer mailing list
> *Subject:* [Mondrian] VFS issue
>
> Awhile back we discovered that Util.readVirtualFile() can throw exceptions
> when large numbers of requests for an HTTP resource happen.  Awhile back I
> added a call to file.close() at the end of that method, which had seemed to
> make things a bit better in testing.  I'm still seeing socketConnect
> exceptions when requesting more than a few hundred http requests.  In
> practice this can happen when we have as few as 15 concurrent users running
> reports.
>
> There appears to be no such problem with the pre-VFS  method that Mondrian
> used for loading a URL.  I created a Unit test which loads 100,000 pages via
> the old Util.readURL method.  That runs fine with no exceptions.  The VFS
> method fails with fewer than 1000 requests.
>
> Would anyone object to reverting back to the old Util.readURL for http
> requests?  Alternatively, I think Will Gorman said at one point that they
> abandoned VFS for other Pentaho projects in favor of some other
> library--would that be worth considering for Mondrian?
>
>
>
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>
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