Bug ID 467868: Leak due to monitor status reporting

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.6.2 HF1, 11.6.0, 11.6.1, 11.6.2, 11.6.3,,,,, 11.6.4, 11.6.5,,,, 12.1.0 HF1, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:
12.0.0, 11.6.0 HF5, 11.5.1 HF6

Opened: Jun 18, 2014

Severity: 3-Major

Related Article: K15959


The mcpd memory steadily increases until it runs out. Running "strings" on the resulting core file reveals many instances of a monitor error message.


Slow system performance, unexpected crash and failover.


Must have a monitor configured that generates an error message.


Disable the monitor.

Fix Information

Previously, mcpd might leak memory when returning an error message that contained the reason for a monitor failure. The message now reports the reason without leaking memory.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips