send command in HTTP_REQUEST_DATA is it async

I am trying to mirror the request and response that passes via the Big Ip load balancer to the pool members to another virtual server in the BIGIP.The mirroring is configured via irules.I am using a sideband connection for the same.

Setup:-

1.Includes a F5 virtual server hosted on cloud

2.Another VIP(virtual server) entry created on the management portal,where this server doesnt actually exist.This VIP in turn is attached to a pool consisting of a server .

Data coming to bigip is intercepted using the inbuilt events for eg 

when HTTP_RESPONSE_DATA {
    set responseData [call respwithbody $requestId $debug $auth]
    set send_bytes [send -timeout $connectionTimeout -status send_status $conn_id $rsponseData]
    close $conn_id
    call printLog $debug " Sent bytes: $send_bytes"
}

where the conn_id is the connecteion to the above mentioned virual server(sideband connection to this server)

As per my reading on HSL

https://support.f5.com/csp/article/K50040950

it seems HSL would require changes vis a vis creating a publisher pool and it semes it doesnt log to the vip in my case.Correct me if i am wrong

With this scenarion is HSL is valid for me?

Hello sand87ch,

Why access a VS and not a pool directly?

F5 doesn't officially support load-balancing using a pool that points to a VS which resides in the same machine. I had some issues before with the TAC where they argued that this architecture is not supported.
Anyway, you can bypass this restriction using the virtual command (https://clouddocs.f5.com/api/irules/virtual.html)

HSL is a simple configuration that gives you the chance to configure a pool of servers to send those requests to them. If you can replace VS for Pool in your architecture, this solution will be more efficient.

Anyway, have you considered cloning pools?
https://support.f5.com/csp/article/K13392