Bug ID 674991: TMM may crash on a standby unit after a failover when AAM serves compressed content

Last Modified: Mar 17, 2021

Bug Tracker

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

Known Affected Versions:
11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 11.6.1, 11.6.1 HF1, 11.6.1 HF2, 11.6.2, 11.6.2 HF1, 11.6.3,,,,, 11.6.4, 11.6.5,,,

Opened: Jul 20, 2017
Severity: 4-Minor


AAM caches content for serving without access to the original web server. It also caches compression content, which is accounted in a separate list. In very rare instances, the list might contain inconsistent data, which causes a tmm crash once the list is released.


While the daemon restarts, that tmm cannot take control in the high availability (HA) configuration to process traffic. Traffic disrupted while tmm restarts.


- AAM provisioned and configured. - AAM caches and serves compressed content. - BIG-IP system fails over.



Fix Information


Behavior Change