[mapguide-users] ODBC Point features failure

Thu Jul 5 13:04:57 EDT 2007

Hi Dave, thanks for the responses... 

I didn't know about the error log - there are indeed error messages like 
the following: 

<2007-07-05T13:54:45>                   fac
 Error: Failed to stylize layer: Points
        An exception occurred in FDO component.
        RDBMS: [Microsoft][ODBC SQL Server Driver]Communication link 
failure 
 StackTrace:
  - MgStylizationUtil.StylizeLayers line 923 file 
c:\build_bond_area\mapguide_open_source_v1.2\build_18.1\mgdev\server\src\services\mapping\StylizationUtil.cpp 
Failed to stylize layer: Points
An exception occurred in FDO component.
RDBMS: [Microsoft][ODBC SQL Server Driver]Communication link failure 

Why would there be a Communications link failure?  We have lots of 
processes which communicate to that particular database continually.   It 
seems that something inside the FDO provider times out and it thinks it 
can no longer access SQL Server. 

If I restart the mapguide service and re-open the site, it initially 
works.  If I let it just sit there for a few minutes, without doing any 
zooming or panning or clicking, then when I try to zoom after that, the 
points disappear - and that error message above is in the error log.   So 
it seems that something in the FDO provider is timing out - it is allowing 
the connection to timeout perhaps and it doesn't re-establish it? 

Thanks for your help, 

Ian Elsinga

"Dave Wilson" <dave.wilson at autodesk.com> 
Sent by: mapguide-users-bounces at lists.osgeo.org
07/05/2007 11:36 AM
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RE: [mapguide-users] ODBC Point features failure

Are there any errors logged in the server error log? It seems to me 
something is causing the provider to die? Usually there is at least 1 
error logged before something like this can happen.

What coordinate system is your data in and what coordinate system is your 
map in?

Have you tried using the DWF Viewer/Autodesk Design Review? I’m curious if 
it’s the data or something in the viewer behavior.

Regards,
Dave

From: mapguide-users-bounces at lists.osgeo.org 
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of 
IElsinga at fac.bm
Sent: Thursday, July 05, 2007 6:25 AM
To: MapGuide Users Mail List
Cc: MapGuide Users Mail List; mapguide-users-bounces at lists.osgeo.org
Subject: RE: [mapguide-users] ODBC Point features failure

I noticed that when it stops working, there are no more SQL statements 
being sent to the database.  (Discovered by using SQL Profiler).   

Ian Elsinga
Senior Client/Server Application Developer
First Atlantic Commerce
Bermuda

mailto:ielsinga at fac.bm
Phone : (441) 294-4640
Primary Fax : (441) 295-6855 
Secondary Fax : (441) 295-6708

http://www.firstatlanticcommerce.com

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IElsinga at fac.bm 
Sent by: mapguide-users-bounces at lists.osgeo.org 
07/05/2007 09:15 AM 

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RE: [mapguide-users] ODBC Point features failure

Thanks for the response - there is 4GB of RAM on the mapguide server which 
is running Windows Server 2003.  There are no properties selected and 
there are only two layers.   It is pulling data via ODBC from SQL Server 
on another server which is configured similarly.   

I can use the map for a few minutes, zooming, panning, clicking on points, 
etc., but then the points disappear for no reason and the only way I can 
get them back is to restart the mapguide service.   

Is this a bug I should report somewhere? 

Thanks, 

Ian Elsinga
Senior Client/Server Application Developer
First Atlantic Commerce
Bermuda

mailto:ielsinga at fac.bm
Phone : (441) 294-4640
Primary Fax : (441) 295-6855 
Secondary Fax : (441) 295-6708

http://www.firstatlanticcommerce.com

---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
The information in this Internet e-mail, including attachments, contains 
information that is confidential and may be protected by attorney client 
privileges. This email, including attachments, constitutes non-public 
information intended only for the use of the designated recipient(s) to 
which it is addressed and may contain legal or financial information which 
is privileged, confidential or subject to copyright. Access by any other 
person to this Internet e-mail is not authorized. If you are not the 
intended recipient, please delete this Internet e-mail, including 
attachments, immediately and notify the sender by return email. Any 
disclosure of this Internet e-mail, including attachments, or of the 
parties to it, or copying, distribution or any action taken or omitted to 
be taken in reliance on it is prohibited, and may be unlawful.

"Dave Wilson" <dave.wilson at autodesk.com> 
Sent by: mapguide-users-bounces at lists.osgeo.org 
07/04/2007 06:47 PM 

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RE: [mapguide-users] ODBC Point features failure

In house testing with a feature source containing almost 10,000 features 
appears to work fine. 

How much memory on your system? What is the OS? Do you have properties 
selected on your layer? How many other layers are in your map? 

Regards, 
Dave 

From: mapguide-users-bounces at lists.osgeo.org 
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of 
IElsinga at fac.bm
Sent: Wednesday, July 04, 2007 10:33 AM
To: mapguide-users at lists.osgeo.org
Subject: [mapguide-users] ODBC Point features failure 

I am using MGOS 1.2 RC2 and am experiencing a problem with an ODBC 
connected to SQL Server point source.    Points are displayed initially, 
but then eventually they are not displayed any longer.  Opening a new web 
browser does not help.  The only way I can get them to come back is to 
restart the MapGuide windows service - then the points will come back - 
for a few minutes of interaction.   

I am bringing back 1000 points from a SQL Server database.    This 
behaviour was the same in 1.2 RC1. 

This will obviously make mapguide unusable for our purposes - is there a 
problem with the ODBC FDO?   

I will be grateful for any assistance!   

Ian Elsinga_______________________________________________
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