Bug ID 1400533: TMM core dump include SIGABRT multiple times, on the Standby device.

Last Modified: Jun 20, 2024

Affected Product(s):
BIG-IP APM(all modules)

Known Affected Versions:,, 16.1.4,,,, 17.1.0,,,, 17.1.1,,,

Opened: Nov 21, 2023

Severity: 3-Major


The tmm running on the Standby device is repeatedly killed by sod. There are number of SessionDB ERROR messages on the tmm log. /var/log/tmm1: notice session_ha_context_callback: SessionDB ERROR: received invalid or corrupt HA message; dropped message.


Tmm restarts on the standby device. If a failover occurs while the tmm is restarting, traffic is disrupted.


-- BIG-IP configured for high availability (HA) -- Mirroring enabled -- APM enabled -- Traffic is being passed on the active device



Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips