[mapguide-users] file IO exception

[Dave Wilson]

I believe we may have just fixed a bug relating to connections not
properly being closed by the server. This could cause locking on files
that you eventually need to update or replace. I don't believe there is
a workaround short of restarting the server. If you have regular nightly
updates of files you could schedule a restart prior to that. If you have
an application that is updating the files during the day I'm not sure of
a solution. This possibly applies to both SDF and SHP.

I believe a recent fix was submitted. If you were to build the current
MGOS from source this problem would likely disappear. There is a chance
that disabling connection pooling may reduce the issue, but I believe
this is not on by default for SDF or SHP. This was a server side fix.

Regards,
Dave

-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Jon Rizzo
Sent: Monday, June 04, 2007 6:14 AM
To: mapguide-users at lists.osgeo.org
Subject: [mapguide-users] file IO exception



Hello,

I am having difficulty with my project - it seems that my sdf feature
sources are being locked by MapGuide and MapGuide never seems to release
them.  I tracked the issue down to the simple act of opening and closing
a
feature reader.  I commented out my code until the problem went away and
then I started adding lines back until the problem returned.  When I add
these two lines back, the problem returns, and when I comment them out
again, the problem goes away:
featReader = featureService.SelectFeatures(layerResId, layerClassName,
queryOptions);
featReader.Close();

That's it - just opening and closing the feature reader puts the sdf
file
into a "locked" state, where Studio throws a file IO exception whenever
I
try to reload that resource.  I realize that I can get around the
problem by
restarting the MapGuide service, but I would like to get to the bottom
of
this problem so that I can update my data without resetting my server
every
time.  Any suggestions/ideas?  


Jon


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