Chained HA Proxy with delayed ACK Issue

Help!
1

Hi,

I have a haproxy setup as follow:

Client --> Haproxy (LOCATION A)------> HAProxy(LOCATION B)----> Server.

I am uploading a file to the server, once the upload is completed, Server responds immediately with ACK which I can see it in pcap. But the ACK between Location B and LOCATION A is taking more than 10 secs which delays the response to a real client.

Is there any settings which need to be tweaked in HA Proxy or is there any kernal parameters need to be changed.

2

Haproxy is forwarding TCP payload, not routing IP packets. Those TCP sessions terminate in the local kernel, you must look at the TCP sessions individually.

I suggest you go back to the drawing board and analyze whatever issue you have with that in mind; more likely than not this is not a TCP issue.