Bug ID 939541: TMM may prematurely shut down during initialization when a lot of TMMs and interfaces are configured on a VE

Last Modified: Sep 13, 2023

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

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 16.0.0,, 16.0.1

Fixed In:
16.1.0,, 15.1.3, 14.1.4

Opened: Aug 24, 2020

Severity: 2-Critical


TMM may prematurely shut down (during its initialization) when several TMMs and interfaces are configured. The system logs messages in one or more TMM log files (/var/log/tmm*): MCP connection aborted, exiting.


TMM shuts down prematurely. Traffic disrupted while tmm restarts. Possible deadlock and MCP restart loop requiring a full reboot of the BIG-IP device.


-- BIG-IP Virtual Edition (VE). -- Happens during TMM startup. -- The issue is intermittent, but is more likely to occur on systems with a lot of TMMs (more 20 in most cases) and several interfaces (approximately 8 or more).



Fix Information

TMM no longer shuts down prematurely during initialization.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips