Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

Satriaji's avatar
Satriaji
Icon for Cirrus rankCirrus
Mar 23, 2023

TMM Restarting (OS Version 12.1.1)

Hi Everyone, I have a problem with my F5 device. The problem is the tmm service always restarting continuesly, so its make the device INOPERATIVE (intermittent active-standby).  Here the logs : "Ma...
application delivery
inopperative
tmm
tmm restart
Satriaji's avatar
Satriaji
Icon for Cirrus rankCirrus
Mar 23, 2023

The technical support for this OS device has been out of support (Technical EOS at 2021), so we cannot open TAC to support.

For now the log still appear :

[msi@JTLSF-DNS-PR-SOA-PREPROD:INOPERATIVE:Standalone] ~ # Mar 23 23:51:45 JTLSF-DNS-PR-SOA-PREPROD emerg logger: Re-starting tmm

 

This device is vCMP Guest, the other guest is normal. Just thist guest that having problem tmm restarting.

 

 

 

DuncanJones's avatar
DuncanJones
Icon for Nimbostratus rankNimbostratus
Mar 24, 2023
Satriaji wrote:

The technical support for this OS device has been out of support (Technical EOS at 2021), so we cannot open TAC to support.

For now the log still appear : Tower Defense

[msi@JTLSF-DNS-PR-SOA-PREPROD:INOPERATIVE:Standalone] ~ # Mar 23 23:51:45 JTLSF-DNS-PR-SOA-PREPROD emerg logger: Re-starting tmm

 

This device is vCMP Guest, the other guest is normal. Just thist guest that having problem tmm restarting.

 

 

 

The Traffic Management Microkernel (tmm) process may restart without a stack trace or core file after becoming disconnected from the Master Control Program Daemon (mcpd) process.

This issue occurs when all of the following conditions are met:

  • The Linux kernel memory becomes fragmented.
  • Another memory-intensive operation occurs, which may include:
    • You perform a configuration synchronization (ConfigSync) with full reload.
    • You run a tcpdump session.

If tmm fails to start or restart properly as a result of this issue, you can try to recover the system temporarily by restarting the BIG-IP system.