double hope issue

  • 27 June 2012
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dear all , 


i am facing wiered behaviour here in K2 blackpoint , my enviroment as bellow.


2 SharePoint Web Front End servers ( NLBed )


2 SharePoint Application Servers all services duplicated ( K2 server installed here )


2 SQL clustered.


every thing were going fine , and i tested from servers and from end users machines.


now i have 401 unauthorized error, when submitting the form from out side the servers. and sometimes from the servers. 


now do i facing the double hub issue in this environment ?????!!!!!!!! as i understood from the documentation the communication path as follow


 request comes to  WFE servers


then WFE submit the credential to Application Server ( this is step one)


then Application Server pass the credential to K2 server ( this is step two)


some one is telling nooo ,, this is how its works


Step One : user submit the form to WFE


Step Two : WFE pass the credential to App server.


Step Three : App Server failed to communication to K2 server ... 


Any one know what happening here !! which scenario is the correct one , i cant take the decision from here. 


And please note , that the i was submitting the forms out side the server before.


Step 2 ) from the WFE to K2 Server


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