We rarely use patience page feature by configuring ICAP Feedback with our Content Analysis(CAS). If Content length header is not exist in the response from the OCS, ProxySG will show us a patience page but it continues forever, never end.
Release : All ProxySG OS
Component : ICAP
This is a limitation of the SGOS.
The easy way to solve the issue is to use Trickle object data from stat/end instead of patience page.
As a well know behavior of the response header from the OCS, "Content length" header is not simultaneously used with "Transfer-encoding: chunked". So if OCS returns a "Transfer-encoding: chunked" header, Proxy SG will be in the patience page loop. In order to avoid this issue with the policy, here is an example.