Bug ID 1041865: Correctable machine check errors [mce] should be suppressed

Last Modified: Jan 20, 2023

Bug Tracker

Affected Product:  See more info
BIG-IP TMOS(all modules)

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,,,, 14.1.5,,,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5,, 15.1.6,, 16.0.0,, 16.0.1,,, 16.1.0, 16.1.1, 16.1.2,,, 16.1.3

Fixed In:
17.0.0,, 15.1.7

Opened: Aug 20, 2021
Severity: 2-Critical
Related Article:


Log emerg in kern.log similar to: emerg kernel: mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 10: cc003009000800c1


Correctable errors are logged in kern.log and to the console. There is no functional impact.


Correctable errors can be identified by analyzing the 16-bit value shown in bits [31:16] of the 64-bit error from the /var/log/kern.log message. There are many types of correctable errors that are not service impacting. Correctable errors are part of the ECC DIMM technology. The following is an example of a correctable error. An example is shown below. Log error matches this pattern: Machine Check: 0 [bank number]: [cc003009][0008][00c1] bits [31:16] = 0008


If the error message matches the signature in the example above, an RMA is not needed. If the error message does not match that signature, check the system's traffic condition and confirm there is no negative performance impact. If no performance impact is observed then it means the error is a correctable error and an RMA is not required. F5 recommends that you upgrade to a fixed TMOS version, then check that the error message is eliminated. For more information, see K16392416: Memory errors and MCE errors

Fix Information

Fixed “correctable MCE error suppressed” errors.

Behavior Change