FYI - i did manage to fix the issue with hostname not coming in the HA message - and now hostname is coming and my sessions are working perfectly fine.
Great to hear that you managed to sort it out! Could you please tell us what was wrong and how you fixed it?
But, i am facing issue with creating multiple sessions . getting segmentation fault
This is because modern desktop environments lack the support of having multiple sessions running for the same user account. This is not a limitation in ThinLinc. You can read more about it here.
I believe the segmentation fault comes from the startup of Xfce, which fails.
Does this always happen when starting more than one session for the same user?
Regards,
Martin