Carbon Black Cloud: Error: ec_enable_module Received an UNEXPECTED call to enable module while module is in enabling state

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Environment

• Carbon Black Cloud Sensor: 2.13.0,  2.13.1
• Linux: All Supported Versions

 

Symptoms

During the Sensor Upgrade or Downgrade, followed by cbagentd restart. using  "systemctl restart cbagentd" command
/var/log/messages getting filled with following Error Messages
 

kernel: [ 1328.995698] event_collector_2_5_974930: ec_enable_module Received an UNEXPECTED call to enable module while module is in enabling state
kernel: [ 1328.996227] event_collector_2_5_974930: ec_enable_module Received an UNEXPECTED call to enable module while module is in enabling state
kernel: [ 1328.996488] event_collector_2_5_974930: ec_enable_module Received an UNEXPECTED call to enable module while module is in enabling state
kernel: [ 1328.996741] event_collector_2_5_974930: ec_enable_module Received an UNEXPECTED call to enable module while module is in enabling state

 

Cause

During the upgrade the new 2_5_974930 module is trying to disable the old module. Then the new kernel module gets another request to enable, while still waiting on the original enable request.

Resolution

1. The "ec_enable_module Received an UNEXPECTED call to enable module while module is in enabling state" log message was fixed in 2.13.2.
2. The fix for the issue is also in 2.13.3 

Additional Notes

The problem was introduced in 2.13.0 so if upgrade is performed directly from 2.10 issue will not occur. 

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Carbon Black Cloud: How to Collect Sensor logs locally (Linux)