Bug ID 1987361: APMD file descriptor exhaustion when LDAP operational timeout is set to 180 seconds

Last Modified: Sep 01, 2025

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

Known Affected Versions:
15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 15.1.9, 15.1.9.1, 15.1.10, 15.1.10.2, 15.1.10.3, 15.1.10.4, 15.1.10.5, 15.1.10.6, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2

Opened: Jul 17, 2025

Severity: 3-Major

Symptoms

You may observe below string in /var/log/apm* "Too many open files" "threads 560, running 560"

Impact

Unable to process APM traffic

Conditions

NTLM config with LDAP pool configuration.

Workaround

Restart APMD process

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips