Bug ID 668521: Bigd might stall while waiting for an external monitor process to exit

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.6.1, 11.6.2, 11.6.3,,, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 12.1.0, 12.1.1, 12.1.2, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:
13.1.0, 12.1.3,

Opened: Jun 09, 2017

Severity: 3-Major


The bigd process restarts due to a hearbeat failure. /var/log/ltm will contain a message similar to: warning sod[5444]: 01140029:4: HA daemon_heartbeat bigd fails action is restart.


bigd will restart due to a heartbeat failure and monitoring will be interrupted.


External monitors are in use. External monitors include user-defined external monitors as well as built-in external monitors (for example, SNMP, LDAP, etc.) High system load makes this more likely to occur.


Mitigations: -- If possible, reduce the system load on the BIG-IP system. -- If possible, use a built-in monitor type.

Fix Information

bigd no longer stalls while waiting for an external monitor process to exit.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips