1.2.0 Beta 2, GDAL and Tiling Service crashes

[amorsell]

I am using the GDAL provider in 1.2.0 beta 2 to access a directory of about 850 ECW images. Each image is about 25 MB and there is a total of 20 GB in the directory. Creating a layer with a zoom threshold of 1:50,000 actually works pretty well, but is still too slow due to the GDAL provider's lack of tile indexing. We would like to use base layer tiles instead. But, upon initial tests this locks up the MG server service. This is easily replicated after restarting the service. The log file returns an error like:

<2007-05-31T19:17:10> Anonymous

Error: Failed to stylize layer: Austin_2006_aerials_ECW

An unclassified exception occurred.

StackTrace:

• MgStylizationUtil.StylizeLayers line 923 file c:\build_bond_area\mapguide_open_source_v1.2\build_11.8\mgdev\server\src\services\mapping\StylizationUtil.cpp Failed to stylize layer: Austin_2006_aerials_ECW

An unclassified exception occurred.

This happens both with the service running normally and in interactive mode. Interactive mode does not yield any meaningful messages. The mgserver.exe process is still resident in addition to four MapAgent.exe processes. If I look at the tile folders, the folders have been created, but only one PNG actually created in one folder (R0/C0 folder). However, there are four .lck files in that folder. All have the same time stamp and are 0 KB in size.

I even tried this with just two images and upon succesive zooms to force tiles to create at the various zoom factors, I can readily crash the server.

[tomfukushima]

Will not be fixed in 1.2.0. Moving to 1.3.

[amorsell]

Some additional information from error.log

<2007-06-01T19:35:30> Anonymous

Error: An unclassified exception occurred. StackTrace:

• MgTileServiceHandler.ProcessOperation line 83 file c:\build_bond_area\mapguide_open_source_v1.2\build_13.7\mgdev\server\src\services\tile\TileServiceHandler.cpp
• MgOpGetTile.Execute line 129 file c:\build_bond_area\mapguide_open_source_v1.2\build_13.7\mgdev\server\src\services\tile\OpGetTile.cpp
• MgServerTileService.GetTile line 263 file c:\build_bond_area\mapguide_open_source_v1.2\build_13.7\mgdev\server\src\services\tile\ServerTileService.cpp
• MgServerDrawingServiceUtil.MgServerDrawingService line 1171 file c:\build_bond_area\mapguide_open_source_v1.2\build_13.7\mgdev\server\src\services\drawing\ServerDrawingService.cpp An unclassified exception occurred.

<2007-06-01T19:35:35> Administrator

Error: An unclassified exception occurred. StackTrace:

• MgTimedEventHandler.handle_timeout line 123 file c:\build_bond_area\mapguide_open_source_v1.2\build_13.7\mgdev\server\src\core\TimedEventHandler.cpp
• MgResourceChangeEventHandler.HandleEvent line 76 file c:\build_bond_area\mapguide_open_source_v1.2\build_13.7\mgdev\server\src\core\ResourceChangeEventHandler.cpp
• MgServiceManager.DispatchResourceChangeNotifications line 546 file c:\build_bond_area\mapguide_open_source_v1.2\build_13.7\mgdev\server\src\common\manager\ServiceManager.cpp
• MgServerResourceService.EnumerateParentMapDefinitions line 1123 file c:\build_bond_area\mapguide_open_source_v1.2\build_13.7\mgdev\server\src\services\resource\ServerResourceService.cpp
• MgApplicationRepositoryManager.EnumerateParentMapDefinitions line 698 file c:\build_bond_area\mapguide_open_source_v1.2\build_13.7\mgdev\server\src\services\resource\ApplicationRepositoryManager.cpp
• MgApplicationResourceContentManager.EnumerateParentMapDefinitions line 214 file c:\build_bond_area\mapguide_open_source_v1.2\build_13.7\mgdev\server\src\services\resource\ApplicationResourceContentManager.cpp An unclassified exception occurred.

[warmerdam]

Andy,

I wonder if this is related to the GDAL multi-threading issue:

​http://trac.osgeo.org/fdo/ticket/100

[jbirch]

Closing, stability of GDAL provider was improved drastically with 1.2 Release. Ongoing issues with raster provider should be logged against FDO.