Issue
After installing K2 blackpearl 4.7, K2 service is unable to start. The following error is thrown in the HostServer logs:
"Error","System","2010","TypeLoadError","SourceCode.Hosting.Server.Runtime.HostTypeLoader.LoadHostableTypes","2010 Type Load Error, Method 'GetClassAce' in type 'SourceCode.Authorization.Service.AuthorizationService' from assembly 'SourceCode.Authorization.Service, Version=4.0.0.0, Culture=neutral, PublicKeyToken=16a2c5aaaa1b130d' does not have an implementation."
Diagnosis
This error indicates that there is a missing dependent assembly in the GetClassAce method in SourceCode.Authorization.Service.dll.
The GetClassAce method depended on this assembly: SourceCode.Authorization.Interfaces.dll. We found this assembly present in the following locations:
- [Program Files]K2 blackpearlHost ServerBin
- [Program Files]K2 blackpearlHost ServerBinhostedServices
- C:WindowsMicrosoft.NetassemblyGAC_MSILSourceCode.Authorization.Interfacesv4.0_4.0.0.0__16a2c5aaaa1b130d
The SourceCode.Authorization.Service.dll assembly in [Program Files]K2 blackpearlHost ServerBin and [Program Files]K2 blackpearlHost ServerBinhostedServices are of the correct version, but oddly the one C:WindowsMicrosoft.NetassemblyGAC_MSIL is of a newer version.
Resolution
K2 Five was likely installed on this same server previously, and a clean up was not done properly so there are some assemblies from K2 Five that were left over. On K2 blackpearl 4.7, SourceCode.Authorization.Service.dll should not be present in C:WindowsMicrosoft.NetassemblyGAC_MSIL.
Remove the SourceCode.Authorization.Service.dll assembly from C:WindowsMicrosoft.NetassemblyGAC_MSIL, and running a repair with K2 Setup Manager allows the K2 service to be started without any errors.