Bug ID 1518997: Under extreme conditions (with full load) traffic fail over and TMM restart may happen due to internal Session DB malfunction

Last Modified: Jun 13, 2024

Affected Product(s):
BIG-IP F5OS-C(all modules)

Known Affected Versions:,,

Opened: Feb 13, 2024

Severity: 2-Critical


On a High capacity chassis system that is running at extreme load conditions with HA pair configuration, it is observed that occasionally a failover may happen due to an internal SessionDB malfunctioning. The system is handling about 40k+ connections in this state and is seen seldomly. This may lead to a TMM restart due to the ABORT situation due to looking up problems with sessionDB


Unintended failover happens and may lead to slight Performance degradation and TMM restart


Running at extreme load conditons and handling 40k+ connections


The system will recover by itself after reboot. But it may cause a disturbance to client traffic for a short duration while failover happens or TMM restart.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips