[DISPATCH-2232] [http2] http response is fragmented across many TCP packets thus increasing latency

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.18.0
• Component/s: Protocol Adaptors
• Assignee: Ganesh Murthy
• Reporter: Ganesh Murthy
• Created: 20/Aug/21 14:43
• Updated: 19/Nov/21 21:43
• Resolved: 07/Sep/21 13:21

Description

To reproduce -

Install the strest-grpc client and server from https://github.com/BuoyantIO/strest-grpc

Run a single request/response direct test between client and server and capture the HTTP2 traffic between the client and the server using wireshark.

- ./strest-grpc client --latencyUnit us --connections 1 --iterations 1 --address localhost:9000 --totalRequests 1

Notice that the server responds to the request and the response is all in one TCP packet.

 

Now put a router in-between the client and the server and let the client connect to the router and capture wireshark trace.

 

The router sends back to the client several small TCP packets instead of one large TCP packet.