id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc,external_id 2596,Constant crashes under high load/many concurrent requests,andymorf,,"Firing 100-200 concurrent QUERYMAPFEATURES (according Maptip) to mapagent leads to constant crashing of mgserver. Before crashing there are a lots of exceptions logged: {{{ Error: Invalid argument(s): String argument is empty: className StackTrace: - MgRenderingServiceHandler.ProcessOperation line 83 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\rendering\RenderingServiceHandler.cpp - MgOpQueryFeatures.Execute line 125 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\rendering\OpQueryFeatures.cpp - MgServerRenderingService.QueryFeatures line 1093 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\rendering\ServerRenderingService.cpp - MgServerRenderingService.RenderForSelection line 1826 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\rendering\ServerRenderingService.cpp - MgServerFeatureService.SelectFeatures line 451 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\feature\ServerFeatureService.cpp - MgServerSelectFeatures.SelectFeatures line 331 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\feature\ServerSelectFeatures.cpp - MgServerSelectFeatures::ValidateParam line 826 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\feature\ServerSelectFeatures.cpp <2016-06-06T20:41:30> 8788 MgStress 127.0.0.1 Administrator Error: The specified class was not found. StackTrace: - MgRenderingServiceHandler.ProcessOperation line 83 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\rendering\RenderingServiceHandler.cpp - MgOpQueryFeatures.Execute line 125 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\rendering\OpQueryFeatures.cpp - MgServerRenderingService.QueryFeatures line 1093 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\rendering\ServerRenderingService.cpp - MgServerRenderingService.RenderForSelection line 1826 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\rendering\ServerRenderingService.cpp - MgServerDescribeSchema.GetClassDefinition line 1029 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\feature\ServerDescribeSchema.cpp <2016-06-06T20:41:30> 6236 MgStress 127.0.0.1 Administrator Error: An exception occurred in FDO component. Error occurred in Feature Source (Library://oradata/av.FeatureSource): c_KgOraSelectCommand.Execute : ERROR: FindClassDefinition() return NULL (Cause: , Root Cause: c_KgOraSelectCommand.Execute : ERROR: FindClassDefinition() return NULL ) StackTrace: - MgRenderingServiceHandler.ProcessOperation line 83 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\rendering\RenderingServiceHandler.cpp - MgOpQueryFeatures.Execute line 125 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\rendering\OpQueryFeatures.cpp - MgServerRenderingService.QueryFeatures line 1093 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\rendering\ServerRenderingService.cpp - MgServerRenderingService.RenderForSelection line 1826 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\rendering\ServerRenderingService.cpp - MgServerFeatureService.SelectFeatures line 451 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\feature\ServerFeatureService.cpp - MgServerSelectFeatures.SelectFeatures line 331 file c:\working\build_area\mapguide\3.1.0\x64\mgdev\server\src\services\feature\ServerSelectFeatures.cpp }}} * If sending the requests one after another, everyone is executed correct response. * KingOra is used",defect,closed,high,3.1,Server,3.0.0,blocker,fixed,"crash, high load",Andreas Morf,