Bug ID 501516: If a very large number of monitors is configured, bigd can run out of file descriptors when it is restarted.

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
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, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 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:
12.0.0, 11.6.0 HF6, 11.5.3 HF2, 11.4.1 HF9

Opened: Jan 17, 2015
Severity: 3-Major
Related AskF5 Article:


When using a very large number of monitors, bigd may run out of file descriptors when it is restarted.


bigd cores and gets into a restart loop; monitors no longer work properly. The ltm log might contain error messages similar to the following: socket error: Too many open files.


A system with a large number of monitors configured.


Reduce the number of monitors on the system.

Fix Information

bigd no longer runs out of file descriptors during restart when using a very large number of monitors.

Behavior Change