Bug ID 523318: Creating too many iFiles causes tmm crash.

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.1, 11.6.2, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 12.1.0, 12.1.1, 12.1.2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6

Fixed In:
13.0.0

Opened: May 14, 2015

Severity: 3-Major

Symptoms

Tmm might crash when too many iFiles are created.

Impact

Traffic disrupted while tmm restarts.

Conditions

The crash has been seen with 1700 iFiles on a BIG-IP with 6 tmm threads.

Workaround

- Increase the number of file descriptors (ulimit -n) in /etc/bigstart/scripts/tmm. - bigstart restart tmm.

Fix Information

The maximum number of open file descriptors now scales with the number of tmm threads, so tmm no longer crashes when a very large number of iFiles (e.g., 1700) are created.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips