[mapguide-trac] #1942: Server is down when zooming map with SID type raster image.

[MapGuide Open Source]

#1942: Server is down when zooming map with SID type raster image.
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   Reporter:  christinebao     |       Owner:  Christine Bao
       Type:  defect           |      Status:  new          
   Priority:  medium           |   Milestone:               
  Component:  Feature Service  |     Version:  2.1.0        
   Severity:  major            |    Keywords:               
External_id:  1447921          |  
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Comment(by christinebao):

 Cause of this problem:
 The problem is caused by recent update of ATIL (Jan 9, 2012). The decoder
 is changed and not work for multiple thread. So in MapGuide if multiple
 request is sent to get image, the memory mess up and crash.
 Note: in flexible weblayout, many requests (about 5~8) are send during one
 zoom, so it's more obvious to see the crash. In basic weblayout only one
 request is sent during one zoom, so it's not so obvious to see the crash
 in one user environment, but if multiple users use basic weblayout, the
 crash still happens.

 Fix:
 Add a ACE lock in get raster data.

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Ticket URL: <http://trac.osgeo.org/mapguide/ticket/1942#comment:1>
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