[DISPATCH-2192] Streaming link leak during TCP + iperf3 testing

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.16.1
• Fix Version/s: 1.17.0
• Component/s: Protocol Adaptors, Router Node
• Assignee: Ken Giusti
• Reporter: Ken Giusti
• Created: 08/Jul/21 14:33
• Updated: 23/Aug/21 15:01
• Resolved: 13/Jul/21 16:19

Description

Running the iperf3 test against a three hop router configuration results in the number of streaming links on the inter-router connections to grow continually.

These links remain active and are never reclaimed, even after the iperf3 test clients and server exit.

To reproduce - establish 3 routers using the attached configuration.  Run the iperf3 server:

iperf3 --server -p 8080 &

Run the iperf3 client several times, using many connections:

$ iperf3 -c 127.0.0.1 -p 8000 -P 100

Check the number of inter-router links:

$ qdstat -r RouterTcpA -l | grep inter-router | wc
422 8440 74272

The total number of links keeps increasing.  It appears that each link still has some traffic on it - undelivered or unsettled messages - which will keep it from being reclaimed.