Bug ID 504280: ZebOS daemons core on shutdown - lack of good asynchronous handling of signals in ZebOS

Last Modified: Oct 07, 2023

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

Known Affected Versions:
11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 12.1.0 HF1, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 15.0.0, 15.0.1,,,,

Fixed In:
12.1.0, 12.0.0

Opened: Feb 02, 2015

Severity: 3-Major


A race condition between data structure initialization and clean up due to lack of asynchronous signal handling.


ZebOS daemons generate core files and might lead to false alarms and increased cost in dealing with the core files.


Repeated shutdown and start of the ZebOS daemons.



Fix Information

Provided support for Asynchronous signal handling of the ZebOS daemons. This enables a clean start and stop of the daemons.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips