Bug ID 490577: TMM may crash on shutdown in a vCMP guest.

Last Modified: Mar 17, 2021

Bug Tracker

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

Known Affected Versions:
11.4.1, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 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,,,

Fixed In:
12.0.0, 11.5.2, 11.5.1 HF7, 11.4.1 HF7

Opened: Nov 13, 2014
Severity: 3-Major
Related AskF5 Article:


TMM may crash and leave a core file behind in a vCMP guest. This can occur when the guest TMM is being shutdown.


There is no impact to traffic processing. A core file may be found in /shared/core on the vCMP guest after the TMM process restarts.


This issue can occur in vCMP guest where the hypervisor version is different than the guest version on any hardware platform.


This issue has no workaround at this time.

Fix Information

An issue has been corrected which could result in the TMM process crashing and leaving a core during process shutdown.

Behavior Change