Hi,

The javascript you showed is the normal reply to a create session request from the client, so it seems ok from that side, and gives us no clue on the actual cause of the issue.
You should make sure that your data adapter continues to work regularly and push updates into the Lightstreamer server.
If we're not sure of that it is difficult to further investigate the problem.
Maybe, when you catch the exception you just discard the update received from the back-end and don't send anything to the server anymore?

Regards,
Giuseppe