[mapguide-trac] #174: Race condition on successive feature readers

[MapGuide Open Source]

#174: Race condition on successive feature readers
------------------------------------+---------------------------------------
 Reporter:  ksgeograf               |         Owner:       
     Type:  defect                  |        Status:  new  
 Priority:  medium                  |     Milestone:  1.2  
Component:  Server                  |       Version:  1.2.0
 Severity:  major                   |    Resolution:       
 Keywords:  MgFeatureReader C# API  |   External_id:       
------------------------------------+---------------------------------------
Comment (by ksgeograf):

 Yes, I am. Both rd.Close() and rd.Dispose().

 The problem persists, even if I don't close the reader.
 If I remove the rd.ReadNext(), the problem goes away.
 If I remove the code to read feature attributes, the problem persists.

 So, the open, read, open sequence seems to cause the server crash.

 I found the following in the log:
 {{{
 <2007-05-26T14:55:22>                   Administrator
  Error: Invalid argument(s):
                 [1] = "222959432"
         The feature reader ID was not found.
  StackTrace:
   - MgFeatureServiceHandler.ProcessOperation line 83 file
 c:\build_bond_area\mapguide_open_source_v1.2\build_13.7\mgdev\server\src\services\feature\FeatureServiceHandler.cpp
   - MgOpGetFeatures.Execute line 102 file
 c:\build_bond_area\mapguide_open_source_v1.2\build_13.7\mgdev\server\src\services\feature\OpGetFeatures.cpp
   - MgServerFeatureService.GetFeatures line 841 file
 c:\build_bond_area\mapguide_open_source_v1.2\build_13.7\mgdev\server\src\services\feature\ServerFeatureService.cpp
 Invalid argument(s):
         [1] = "222959432"
 The feature reader ID was not found.
 }}}

 I should have checked there before I posted the error, I appologize.

-- 
Ticket URL: <http://trac.osgeo.org/mapguide/ticket/174#comment:2>
MapGuide Open Source <http://mapguide.osgeo.org/>
MapGuide Open Source Internals