Bug ID 910097: Changing per-request policy while tmm is under traffic load may drop heartbeats

Last Modified: Jul 12, 2021

Bug Tracker

Affected Product:  See more info
BIG-IP APM, SSLO, SWG(all modules)

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 16.0.0,, 16.0.1

Fixed In:
16.1.0,, 15.1.2,

Opened: May 18, 2020
Severity: 2-Critical


Cluster failover, tmm restart, and tmm killed due to missed heartbeats. tmm crash


Traffic disrupted while tmm restarts.


TMM is under load due to heavy traffic while MCP attempts to configure per-request policy. This can be caused by a modification to the policy or one of its agents, or by a restart of the TMM.


When making changes to per-request policies, use a scheduled maintenance window so that impact to traffic is minimized.

Fix Information


Behavior Change