Bug ID 581851: mcpd process on secondary blades unexpectedly restarts when the system processes multiple tmsh commands

Last Modified: Mar 13, 2019

Bug Tracker

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

Known Affected Versions:
11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 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, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.5.4, 11.5.4 HF1, 11.5.4 HF2, 11.5.4 HF3, 11.5.4 HF4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 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, 12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7

Fixed In:
14.1.0, 14.0.0, 13.1.0.8, 12.1.3.6, 11.6.3.2, 11.5.9

Opened: Mar 18, 2016
Severity: 2-Critical
Related AskF5 Article:
K16234725

Symptoms

The Master Control Program Daemon (MCPD) on secondary blades may unexpectedly restart when the BIG-IP system processes multiple, concurrent TMOS Shell (tmsh) commands. Under these circumstances, a race condition may occur and cause the mcpd process on the secondary blades to fail to correctly process concurrent updates from the primary blade. As a result of this issue, you may encounter one or more of the following symptoms: -- The mcpd process on secondary blades unexpectedly restarts. -- You notice error messages in the /var/log/ltm file on the BIG-IP system that appears similar to the following example: + err mcpd[<PID>]: 01070823:3: Read Access Denied: The current update partition ([None]) does not match the object's partition (Common), stats not reset + err mcpd[<PID>]: 01070734:3: Configuration error: Configuration from primary failed validation: 01070823:3: Read Access Denied: The current update partition ([None]) does not match the object's partition (Common), stats not reset -- Depending on your high availability (HA) configuration, the device may unexpectedly fail over to another system in the device group.

Impact

The BIG-IP system may experience performance degradation when the secondary blades become unavailable while the mcpd process restarts. Depending on your HA configuration, the device may fail over.

Conditions

This issue occurs when all of the following conditions are met: -- You have a VIPRION platform or Virtual Clustered Multiprocessing (vCMP) guest configuration that uses two or more blades. -- You attempt to run multiple, concurrent tmsh commands on the BIG-IP system. For example, you run a tmsh command to continually reset persistence records and at the same time run another tmsh command to continually reset the TCP statistics.

Workaround

None.

Fix Information

This issue no longer occurs.

Behavior Change