Last Modified: Jul 18, 2026
Affected Product(s):
BIG-IP All
Known Affected Versions:
11.5.1, 11.5.1 hf1, 11.5.1 hf2, 11.5.1 hf3, 11.5.1 hf4, 11.5.1 hf5, 11.5.1 hf6, 11.5.1 hf7, 11.5.1 hf8, 11.5.1 hf9, 11.5.1 hf10, 11.5.1 hf11, 11.5.2, 11.5.2 hf1, 11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1, 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
Fixed In:
12.0.0, 11.5.3
Opened: Aug 04, 2014 Severity: 2-Critical Related Article:
K16957
Certain conditions might produce error messages similar to the following in the core file/tmm.log: -- RVAvpBigIP01 notice RIP=0x8cc872 -- RVAvpBigIP01 notice session_process_pending_event_callback ERROR: could not send callback to 192.168.96.27:504 - 192.168.96.28:443 ERR_NOT_FOUND.
Traffic disrupted while tmm restarts.
This occurs because of a race condition, one between the HTTP and APM-related profiles, for example, during which an APM-profile-related action completes after the HTTP-profile closes the connection. Note: Logs that occur without a core are not a symptom related to this issue.
None.
The race condition that occurred has been fixed, so no APM-profile-related actions complete after the HTTP-profile closes the connection.