We cannot find the reason for proxy prematuraly stopping connection reuse, i.e pausing reusing the connection before max request of 2000 is reached.

I am adding logs to specify the reason why connection would not be selected from reuse pull and as well as logging num of req served on this conn at the moment of it expiring

Tested the following - set reuse conn req count and idle to lower numbers (2 req and 5 sec) and observed the logs for expiring due to reaching conn count and due to idle timeout.
The logs for other coditions (for server not writable etc) can't reproduce but they will explain the issue why connection reused is paused before max request count is reached