Bug ID 429770: Pool members become unavailable with connection limit and connection queuing enabled

Last Modified: Oct 06, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
11.4.0, 11.4.1

Fixed In:
11.5.0, 11.4.1 HF9

Opened: Sep 04, 2013
Severity: 3-Major
Related AskF5 Article:


With connection queuing enabled, and with pool members having connection limit set, under certain race condition in the code, the pool members become unavailable and show that they have reached the connection limit. They stay in this state even after the connections themselves are long gone.


Pool members become unavailable, and remain unavailable.


Connection limit on pool members needs to be set. Queue connection needs to be set.



Fix Information

The pool now goes unavailable and comes back available.

Behavior Change