[mapguide-users] Intermittent failure to request features

[simon hope]

Hi,

I've created a service to request features from ArcSDE via the Mapguide .Net
web API and I am experiencing an issue intermittently when a request is
made. Sometimes the request is successful sometime it fails with the
following error:

 Error: An unclassified exception occurred.
 StackTrace:
  - MgFeatureServiceHandler.ProcessOperation line 83 file
c:\build_bond_area\mapguide_open_source_v1.2\build_18.1\mgdev\server\src\services\feature\FeatureServiceHandler.cpp
  - MgOpSelectFeatures.Execute line 112 file
c:\build_bond_area\mapguide_open_source_v1.2\build_18.1\mgdev\server\src\services\feature\OpSelectFeatures.cpp
  - MgServiceOperation.EndExecution line 532 file
c:\build_bond_area\mapguide_open_source_v1.2\build_18.1\mgdev\server\src\common\base\ServiceOperation.cpp
  - MgServerFeatureReader.Serialize line 615 file
c:\build_bond_area\mapguide_open_source_v1.2\build_18.1\mgdev\server\src\services\feature\ServerFeatureReader.cpp
  - MgServerGetFeatures.GetFeatures line 101 file
c:\build_bond_area\mapguide_open_source_v1.2\build_18.1\mgdev\server\src\services\feature\ServerGetFeatures.cpp
An unclassified exception occurred.

I've also tested making the same request from the web tier tests and I get
similar results. I am using MapGuide OS 1.2 together with the
MapGuideDotNetApi.dll and ArcSDE 9.2 (with the corresponding provider).

I've made a couple of changes to my server config. Here are the details:

GENERAL

ConnectionTimeout                  = 5
ConnectionTimerInterval            = 5
DefaultMessageLocale               =en
DisplayName                        = 
FdoPath                            =C:\Program
Files\MapGuideOpenSource\Server\Bin\FDO\
LicenseServerPath                  = @localhost
Locale                             = 
LogsDelimiter                      = \t
LogsPath                           =C:\Program
Files\MapGuideOpenSource\Server\Logs\
MachineIp                          = 127.0.0.1
MaxLogFileSize                     = 1024
MaxLogFileSizeEnabled              = 0
ResourcesPath                      =C:\Program
Files\MapGuideOpenSource\Server\Resources\
SerialNumber                       = 
ServiceRegistrationTimerInterval   = 60
TcpIpMtu                           = 1460
TempPath                           =C:\Program
Files\MapGuideOpenSource\Server\Temp\
WfsDocumentPath                    =C:\Program
Files\MapGuideOpenSource\Server\Wfs\
WmsDocumentPath                    =C:\Program
Files\MapGuideOpenSource\Server\Wms\

FEATURE SERVICE

CacheSize                          = 100
CacheTimeLimit                     = 86400
CacheTimerInterval                 = 3600
DataCacheSize                      = 100
DataConnectionPoolEnabled          = 1
DataConnectionPoolExcludedProviders= OSGeo.SDF,OSGeo.SHP
DataConnectionPoolSize             = 50
DataConnectionPoolSizeCustom       = 
DataConnectionTimeout              = 5
DataConnectionTimerInterval        = 5
JoinQueryBatchSize                 = 100

Could anyone shed any light on the details of the error message, or perhaps
other on the list have had similar problems? 

Cheers

Simon
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