Unable to construct the map service instance

[PriyabrataKundu]

Hi ,

Everytime I start cache generation process of two map services in  parallel thorugh python script using arcpy.ManageMapServerCacheTiles_server method, cache generation process gets aborted due to some error. In log "ERROR 001452 Unable to construct the map service instance" message comes. But when I run same two services saparately, Cache generation process gets successfully completed.

I am using Arcgis 10.2 version.

Please help me. Thanks in advance.

[DanielStauning]

Hi Priyabrata

I would check out this resource page:

ArcGIS Help (10.2, 10.2.1, and 10.2.2)‌

The CachingControllers service (in the System folder) determines how many jobs can run at the same time; the default max instances is 3, has that been modified? How many cores does your CPU have? If too many publishers start requesting cache to be built at the same time, the server can get overwhelmed, even if you only choose to dedicate a small number of instances toward each job.

-Daniel