[mapguide-trac] #459: mgserver locks up when using AGG renderer

[MapGuide Open Source]

#459: mgserver locks up when using AGG renderer
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   Reporter:  jbirch   |       Owner:       
       Type:  defect   |      Status:  new  
   Priority:  medium   |   Milestone:       
  Component:  General  |     Version:  2.0.0
   Severity:  major    |    Keywords:       
External_id:           |  
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 In some cases, when zooming to large scales (depends on dataset and screen
 size), mgserver.exe enters a state where it locks up.  It consumes 98%
 cpu, and can not be terminated with a ctrl-c when run interactively.  This
 only occurs when using the AGG renderer; switching to GD prevents this
 behaviour.

 The attached (or maybe hyperlinked if it's too big) data set can be used
 to exhibit this problem:

  - Load the package hanging_ajax.mgp
  - In Studio, open the weblayout to !Library://ccgismap-
 ext/test/Layout/error_test
  - Preview this layout in the AJAX viewer (from the link in the layout
 editor) and use the mouse wheel to zoom in in increments until the server
 stops responding.
  - you may notice that at a particular scale, the feature no longer
 renders, though the server still responds.  I saw this behaviour at about
 1:100 on my 1280x1024 screen.

 This problem was initially found by Jonathan Manafi, and has been verified
 by Jason Birch, for MGOS 2.0 RC4.

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Ticket URL: <https://trac.osgeo.org/mapguide/ticket/459>
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