Bug ID 722380: The BIG-IP system reboots while TMM is still writing a core file, thus producing a truncated core.

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
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, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,, 14.0.0,,,,,, 14.0.1,

Fixed In:

Opened: May 30, 2018
Severity: 3-Major


On platforms with HSB, if an HSB lockup occurs, then TMM panics and generates a core file for post-analysis. HSB also triggers a nic_failsafe reboot. In certain cases, the reboot occurs before the core file is fully written, resulting in a truncated core.


The reboot happens after the core dump begins before it completes, resulting in a truncated core dump, which is not useful for analyzing why the HSB lockup occurred. Traffic disrupted while tmm restarts.


-- Any platform with HSB. -- An HSB lockup occurs, triggering a core dump and a nic_failsafe reboot.



Fix Information

Reboot is delayed until TMM core file is completed.

Behavior Change