Bug ID 784989: TMM may crash with panic message: Assertion 'cookie name exists' failed

Last Modified: Jul 12, 2023

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

Known Affected Versions:
13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,, 14.0.0,,,,,, 14.0.1, 14.1.0,,,,,, 14.1.2, 15.0.0, 15.0.1

Fixed In:

Opened: May 22, 2019

Severity: 2-Critical


TMM crashes with SIGFPE panic panic: ../modules/hudfilter/http/http_cookie.c:489: Assertion 'cookie name exists' failed.


Traffic disrupted while TMM restarts.


-- Virtual server with remote desktop or VDI profile attached. -- VDI logging level is set to Debug. -- iRule that modifies/reads HTTP cookies.


Increase the log-level for VDI from 'Debug' to a higher level.

Fix Information

Fixed TMM crash, which occurred when remotedesktop/VDI profile was used together with custom iRule and Debug level logging.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips