Bug ID 629145: External datagroups with no metadata can crash tmm

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2

Fixed In:
13.0.0, 12.1.2 HF1

Opened: Nov 17, 2016
Severity: 2-Critical
Related AskF5 Article:


If a large data group exists or the db variable tmm.classallocatemetadata is set to disabled, tmm may crash if the class match iRule matches 9 or more items in the datagroup.


Traffic disrupted while tmm restarts.


External datagroups in use, a class match iRule will produce at least 9 matches, and the datagroup is extremely large or the db variable tmm.classallocatemetadata is set to disabled.



Fix Information

Fixed a tmm crash related to large datagroups.

Behavior Change