Last Modified: Sep 13, 2023
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.4.1, 11.5.0, 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, 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, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1
Fixed In:
13.1.0, 12.1.5.1, 11.6.3
Opened: Sep 08, 2016 Severity: 2-Critical Related Article:
K47381511
bigd crashes after logging an error similar to the following: emerg bigd: PID: 38611 Received invalid magic '1213486160' in the stream
bigd crashes and error messages. Possible interruption of monitoring status, pool members going down, interruption of traffic.
-- Tcl Monitors: FTP, SMTP, POP3, IMAP. -- This issue might also occur if the Tcl worker is in a stuck state, due to pool member not responding within the configured timeout. -- May be particularly likely if the monitor is configured with an interval value of 1 second. Note: Although less frequent, this issue might still occur with proper monitor configurations (timeout: 3*interval + 1).
For the case where a Tcl monitor is configured with a 1-second interval value, increase the interval value to 2 seconds. Also increase the timeout value to 7 seconds (3*interval + 1). This reduces the chances of this issue occurring but does not eliminate it entirely.
Monitor works as expected under the conditions described.