Bug ID 624370: tmm crash during classification hitless upgrade if virtual server configuration is modified

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2

Fixed In:
13.0.0, 12.1.2

Opened: Oct 21, 2016
Severity: 2-Critical


tmm crash


Traffic disrupted while tmm restarts.


1. classification hitless upgrade is triggered 2. pending (not saved) changes on any of the virtual servers



Fix Information

Change of virtual server configuration triggers new library to be loaded during upgrade which wasn't expected by hitless upgrade mechanism and led to tmm crash. This is fixed in versions starting with 12.1.2.

Behavior Change