[mapguide-users] MgTileService - GetTile - Cannot establish connection

[Walt Welton-Lair]

Does your map, by chance, reference any Oracle feature sources?  I don't know the details, but I know there are connection limits with Oracle.  Does your version of MapGuide support connection pooling?  If so, is it enabled?  If not, that could very well explain the problem you're seeing.
 
If the pooling is disabled then every GetTile request will open new connections to your feature sources, and in your case after 50-80 back-to-back tile requests the connection limits are exceeded.
 
Are the lower zoom threshhold tiles rendered more quickly than other tiles?  That would support this theory even more.
 
Walt

	-----Original Message----- 
	From: Kori Maleski [mailto:Kori.Maleski at websoftdev.com] 
	Sent: Tue 12/5/2006 8:08 PM 
	To: users at mapguide.osgeo.org 
	Cc: 
	Subject: [mapguide-users] MgTileService - GetTile - Cannot establish connection
	
	

	Hi all,

	 

	I have built a function that will pre-generate the tiles for a tiled map.

	 

	It works – but when generating for a lower zoom threshold with numerous tiles it will generate 50-80 tiles then throw a series connection errors:

	 

	Cannot establish connection.  Cannot establish connection. Exception occurred in method MgServerConnection.Open at line 95 in file c:\build_tux_area\mgdev\common\service\services\ServerConnection.cpp 

	 

	The MapGuide Server service is then non responsive requiring a restart.

	 

	I am doing a long series of GetTile calls in sequence.

	 

	Has anybody run into this kind of connectivity problem?  Is the best method to simply pause or delay the function so the server isn’t over taxed?

	 

	 

	Cheers,

	 

	 

	 

	
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Kori Maleski

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WEBSOFT DEVELOPERS, INC.

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kori.maleski at websoftdev.com

	
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