We are using our own proprietary application server where webfocus has been integrated and running .
We are migrating webfocus 7612 to webfocus 8103 now.
But We are not able to integrate our application server with webfocus 8 successfully .
It seems ibissid is not passing to WFServlet call though it is getting generated .
Because I see ibissid in trace file IBFS_WFAPI but the same session id is not being passed to WFServlet_WFAPI trace.

I see the ibissid as below in IBFS_WFAPI trace

09.38.21.931:0:5:ibi.webfoc.wfutil.WFContext.setIBFSSessionId:3226 WFContext called setValue of the variable :ibssid value is : 87013b3bd6c93ec2b2edcdda5de9cf09cef802f5
8a720b5c5fb0e6ace912ddea

But in WFServlet_WFAPI_ I see it as null

09.42.16.330:0:9:ibi.webfoc.wfutil.WFContext.getIBFSSessionId:3215 WFContext called getValue of the variable :ibssid value is : null
09.42.16.331:0:10:ibi.webfoc.wfutil.WFContext.getIBFSSessionId:3217 WFContext called getValue of the variable :sesId value is : null

Any what could be the reason for this scenario. I have been working with IBI already but so far no luck.