Symptoms

Just as a quick note, this environment has experienced this problem before. The previous time we managed to resolve it by doing this: http://community.k2.com/t5/K2-blackpearl/Could-not-load-file-or-assembly-SourceCode-EventBus/td-p/62734. Now it's a completely different problem.

"304640572","2015-02-11 15:15:56","Error","EventBus","7008","Processing","EventQueueProcessing.ExecuteAssembly","7008 The following error occurred while executing policy for CustomEventInstanceID: 1609 : Unable to load type : 'SourceCode.EventBus.MessageBusRecorder.MessageBusMailer'.","anonymous","0.0.0.0","dojcdnoc-k2pil1:C:Program Files (x86)K2 blackpearlHost ServerBin","304640572","7ad6f25b0da94e41aabdceb9c0a28d23",""
"304640574","2015-02-11 15:15:56","Error","EventBus","7498","General","EventQueueProcessing.Process","7498 An error has occurred: System.Exception: Unable to load type : 'SourceCode.EventBus.MessageBusRecorder.MessageBusMailer'
at SourceCode.EventBus.Server.EventQueueProcessing.ExecuteAssembly(Int32 CustomEventInstanceID, Int32 CustomEventID, ResolvedPolicyMapping resolvedPolicyMapping, Boolean isConditional, Int32 eventTypeID)
at SourceCode.EventBus.Server.EventQueueProcessing.ProcessEvent(Int32 ID)","anonymous","0.0.0.0","dojcdnoc-k2pil1:C:Program Files (x86)K2 blackpearlHost ServerBin","304640574","d75fcd175d2d444ba62d3427a722e254",""
 

Diagnoses

Noticing that the client had run into this issue before and that it was happening again even though the config changes on the mentioned KB were already done.

I suspected that a previous version of the process is being used that has the old information(config) cached.

 

Resolution

Investigating the config file everything was fine.
C:Program Files (x86)K2 blackpearlHost ServerBinSourceCode.EventBus.EventAssemblies.dll
And should be: C:Program Files (x86)K2 blackpearlHost ServerBinSourceCode.EventBus.MessageBusRecorder.dll

and the following had already been done by the consultant onsite.
1.In SourceCode.EventBus.Server.config update mailassembly and mailassemblytype pointed to the wrong .dll

a. Update the mailassembly to point to iDrive letter:]Program Files (x86)K2 blackpearlHost ServerBinSourceCode.EventBus.MessageBusRecorder.dll instead of eINSTALLDIR]Host ServerBinSourceCode.EventBus.EventAssemblies.dll'

b. Update to point to SourceCode.EventBus.MessageBusRecorder.MessageBusMailer instead of SourceCode.EventBus.EventAssemblies.Mail

2.On the DB:
:Please contact K2 Technical Support for assistance in updating the DB directly.]

After updating the design template and redeploying the issue was resolved.