SV: [mapguide-users] Grey image after some time in MGOS 2.0

[Zac Spitzer]

i filed an example load test using JMeter a while back (my example
relates to using tiled maps)
http://trac.osgeo.org/mapguide/ticket/480

http://trac.osgeo.org/mapguide/ticket/461 "Raster processing unstable
under multi threaded load"
is a closed task in this area.

The raster providers are configured to be single threaded out of the box in 2.0

z




On Sun, Mar 30, 2008 at 3:09 AM, Kenneth, GEOGRAF A/S <ks at geograf.dk> wrote:
>
>  I have seen this as well.
>  It happens less frequently with SDF than with OGR layers.
>  I have not yet had a reproduceable way of making the error appear.
>
>  Could you create a trac ticket, and possible enter descriptions for setting
> up your "load test"?
>  http://trac.osgeo.org/mapguide/
>
>  Regards, Kenneth, GEOGRAF A/S
>
>
>
>  Trond A. Tunheim skrev:
>
>  Hi
>
> There is no raster layers in this composition, only sdf vector layers. We
> had the same problem with MG 1.1.
>
> /Trond Tunheim
>
> ________________________________
> Fra: Maksim Sestic <max at geoinova.com>
> Sendt: 28. mars 2008 16:28
> Til: mapguide-users at lists.osgeo.org <mapguide-users at lists.osgeo.org>
> Emne: Re: [mapguide-users] Grey image after some time in MGOS 2.0
>
>
> This is a common problem with Autodesk MapGuide Enteprise 2008 and Autodesk
> Raster provider. Happens most often if you have several layers within base
> layer group. During base layer tiling operation it happens that some tiles
> simply get "skipped", and stay that way (cached as "empty" tile) even after
> MapGuide service gets restarted. I hope Autodesk will get this fixed in 2009
> version.
>
> Regards,
> Maksim Sestic
>
>
> NorTrond wrote:
>
>
>  Hi,
>
> We have experienced a problem with the MGOS 2.0 installation. After some
> time with moderate load it just returns grey images until the "Mapguide
> Server v2.0" service is restarted. We are using the WebApi with the
> GETMAPIMAGE mapagent operation.
>
> A quick look in the Error.log file reveals some details about the problem
> :
>
> <2008-03-27T10:54:37>
> Anonymous
>  Error: Failed to stylize layer: landlayer
>  An exception occurred in FDO component.
>  SDF connect failed. File does not exist or cannot be opened in
> specified access mode.
>  StackTrace:
>  - MgMappingUtil.StylizeLayers line 776 file
> d:\buildforgeprojects\mapguide_open_source_v2.0\build_23.8\mgdev\server\src\services\mapping\MappingUtil.cpp
> Failed to stylize layer: landlayer
> An exception occurred in FDO component.
> SDF connect failed. File does not exist or cannot be opened in specified
> access mode.
>
> After restarting the Mapguide server service everything works fine for a
> while.
>
> We are using a web loadtester to reproduce the problem. The problem occurs
> with moderate load ( 2 users) continuously requesting maps for a set of
> areas. After about 2 hours the mapguide server ends up in the "gray
> state".
>
> Does anyone have any ideas about this problem ?
>
>
> Br
> Trond Tunheim, CellVision AS
>
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>
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>
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Zac Spitzer -
http://zacster.blogspot.com (My Blog)
+61 405 847 168