Bug ID 580059: DNS Relay proxy component of edge client on windows consumes lot of CPU cycles

Last Modified: Nov 22, 2021

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

Known Affected Versions:

Fixed In:
12.1.0, 12.0.0 HF3

Opened: Mar 12, 2016

Severity: 2-Critical


In certain conditions, DNS relay proxy component of edge clients goes in a state where it takes most of the CPU cycles and starts filling up the log file very quickly with messages of 'Unknown event signaled'


User's machine will become very slow and appear to be unresponsive.


DNS Relay proxy is installed on user's machine


Stop DNS Relay proxy service from service control manager.

Fix Information

Fixed DNS relay proxy so it does not go in a state where it starts consuming huge CPU cycles.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips