Bug ID 493993: TMM crashes on the standby when starting up in HA config and Active processing traffic in APM module

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
11.2.1, 11.3.0, 11.4.1, 11.5.0, 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

Fixed In:
11.6.0 HF6, 11.5.2, 11.5.1 HF7, 11.4.1 HF7

Opened: Dec 02, 2014
Severity: 2-Critical
Related AskF5 Article:
K15914

Symptoms

On a standby unit, TMM dumps core files when it is starting up and continues to do so when the active unit is handling traffic in the APM module.

Impact

TMM on the standby device crashes with SEGV, which causes existing sessions not stored on the standby device and users have to re-login should failover occur.

Conditions

The issue happens on APM systems when high availability is configured and the following conditions are met: 1. The active device is busy processing traffic. 2. Some sessions on the active device are terminated. 3. The TMM in standby device is starting up.

Workaround

None

Fix Information

In APM HA environments, the system now prevents global status from being updated before the initialization is completed on a standby device. TMM on the standby no longer dumps core files on startup.

Behavior Change