Bug ID 519217: tmm crash: valid proxy

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.4.1, 11.6.0

Fixed In:
11.6.1, 11.5.4 HF2, 11.4.1 HF9

Opened: Apr 21, 2015

Severity: 3-Major

Related Article: K89004553


tmm might crash in extremely rare circumstances when a virtual server is used during an update. Standard process is for virtual servers to be unavailable until the configuration update is complete; there are extremely rare circumstances when it is possible for a connection to use a virtual server before it is ready.


Traffic disruption, possible failover to another device if HA is configured. If using keepalive or other means to keep the connection alive, then a long amount of time might pass between the creation of the invalid flow and any impact from the error.


This requires that traffic is running during a configuration update, including a config sync from an HA peer. There must be a virtual server or configuration that uses a second virtual server while traffic is running: these include vip-on-vip using iRules and WAM prefetch, but might include other internal conditions.



Fix Information

If a virtual server is used during an update (that is, before the virtual server is ready), an error message is now posted to tmm log files, and a small amount of memory is used each time this message is logged.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips