[Agent] Error 'Failed to rotate backups' displayed on installing Elastic Agent on Windows with install command

[ghost]

Kibana version:
Kibana: 8.0.0-SNAPSHOT cloud environment with commit 6f983728d7f8c2cf065a6d5099157a5cfdc3cd08

Elasticsearch version:
Elasticsearch: 8.0.0-SNAPSHOT cloud environment

Host OS and Browser version:
Windows , All

Original install method (e.g. download page, yum, from source, etc.):
From 8.0.0-SNAPSHOT cloud environment

Description
Error is displayed in powershell on enrolling agent on Windows with install command

Preconditions

1. 8.0.0-SNAPSHOT latest Kibana cloud environment should be available(commit 6f983728d7f8c2cf065a6d5099157a5cfdc3cd08).
2. Login to the above environment with elastic superuser.
3. 8.0.0 windows agent using https://snapshots.elastic.co/8.0.0-af3cda3c/downloads/beats/elastic-agent/elastic-agent-8.0.0-SNAPSHOT-windows-x86_64.zip file should be available.

Steps to Reproduce

1. RDP to the windows endpoint

2. Copy the above agent file and extract it under C:/Program Files

3. Navigate to C:/Program Files/ElasticAgent folder and open powershell as admin

4. Run the below command:
   ./elastic-agent install

5. Proceed and provide kibana url and enrollment token.

6. Observe that agent is enrolled in the UI but error is displayed in powershell.

Test data
N/A

Impacted Test case id
N/A

Actual Result
Error is displayed in powershell on enrolling agent on Windows with install command.

Expected Result
No Error should be displayed in powershell on enrolling agent on Windows with install command

What's working

• N/A

What's not working

• N/A

Screenshot

Logs
Elastic-Agent-logs.zip

[elasticmachine]

Pinging @elastic/ingest-management (Team:Ingest Management)

[ghost]

@deepikakeshav-qasource Please review the bug.

[blakerouse]

@rahulgupta-qasource Are you sure that you did not have the log open in Notepad or by another program?

[ghost]

Reviewed and assigned to @EricDavisX

[EricDavisX]

Assign Blake / PH to confirm who can work it

[blakerouse]

I am only able to reproduce this with when I have the log file open. The error is expected in that case and it doesn't block the installation or enrollment.

[ph]

I think this is a correct behavior here too, @rahulgupta-qasource Can you confirm #21627 (comment) ?

[EricDavisX]

removing 'high' impact for now, if it doesn't block install. and i don't see this on other vms.

[ghost]

Hi @blakerouse / @ph

Failed to rotate backups error is still displayed when log file is not open in Notepad or another program on enrolling Windows agent. Windows agent is successfully enrolled under agents tab on 8.0.0-SNAPSHOT Kibana cloud environment (having above commit 6f983728d7f8c2cf065a6d5099157a5cfdc3cd08 and 8.0.0 windows agent using https://snapshots.elastic.co/8.0.0-af3cda3c/downloads/beats/elastic-agent/elastic-agent-8.0.0-SNAPSHOT-windows-x86_64.zip file).

[blakerouse]

I have been able to reproduce this. I think the issue is that enroll tries to rotate the logs while the Elastic Agent daemon is running in the background. I think that enroll should not be writing too that file at all as its a CLI command and not a daemon that should be writing to that file.

Again the error is not critical, but it does look bad.