Bug ID 669645: tmm crashes after LSN pool member change

Last Modified: May 29, 2024

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

Known Affected Versions:
12.1.0, 12.1.1, 12.1.2, 12.1.3,,,,,,,, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:
13.1.0, 12.1.4

Opened: Jun 16, 2017

Severity: 2-Critical

Related Article: K44021449


Changing LSN pool members while processing traffic may cause tmm to crash.


When tmm crashes, traffic processing will stop until tmm restarts. Note that this can occur, even if the change was on a high-availability peer unit and config-sync has taken place.


-- Changing, using, or removing an LSN pool. -- Traffic is being processed.


Recommend to change LSN pool members during a maintainence window with low traffic or ideally to use an HA pair with a standby unit for implementing configuration changes on live traffic.

Fix Information

tmm no longer crashes when changing LSN pool members while processing traffic.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips