### Human: Can you tell about Alert - A160176 - ConfigChangeNotifyFailed. ### Assistant: Investigating ConfigChangeNotifyFailed issues on a Nutanix cluster. This Nutanix article provides the information required for troubleshooting the alert ConfigChangeNotifyFailed for your Nutanix Files cluster."
Alert Overview

The ConfigChangeNotifyFailed alert is generated when there is a discrepancy between the File Servers and Prism Central configuration. 

Sample Alert

Block Serial Number: 23SMXXXXXXXX
Output messaging

Check ID160176DescriptionFailed To Notify Config Change To File ServerCause of failureFile Server is down or not reachable while config change happens on PC/PEResolutionsCheck if File server is up and all the services are running. If File server is up, check network connectivity between File Server and PC/PE controller VM. If the failure persists, then refer to KB article 14745 to push the config change using afs cli.ImpactNAAlert IDA160176Alert TitleFailed To Notify Config Change To File ServerAlert MessageFailed to generate PCConfigChangeNotifyFailure alert due to 'reason'.. Troubleshooting
Check if the Files Server is up.

nutanix@NTNX-A-CVM:~$ ncli fs ls | grep "File server status"

Check if all service are up and running on the FSVMs.

nutanix@NTNX-A-CVM:~$ ncli fs ls | grep "File server status"

Check the connectivity between Prism Central and Prism Element, including the various required ports.  This information can be found on the Nutanix Portal.Run NCC on Prism Element to confirm that no "Prism Central is unreachable" alerts are raised. 

Resolving the Issue

If Prism Central is reachable you can push the Files configuration to Prism Central to resolve this issue.For syncing config changes from Prism Element to Prism Central

nutanix@NTNX-A-CVM:~$ ncli fs ls | grep "File server status"
For syncing changes from Prism Element to Files

nutanix@NTNX-A-CVM:~$ ncli fs ls | grep "File server status"
 

Collecting Additional Information

Attaching Files to the Case

If this alert automatically generates a support case, add the following sections:

"If you need further assistance from Nutanix Support, add a comment to the case on the support portal asking Nutanix Support to contact you. If you need urgent assistance, contact the Support Team by calling one of our Global Support Phone Numbers. You can also click the Escalate button in the case and explain the urgency in the comment, and Nutanix Support will be in contact."

"If this KB resolves your issue and you want to close the case, click on the Thumbs Up icon next to the KB Number in the initial case email. This informs Nutanix Support to proceed with closing the case. You can also update the support case saying it is okay to close the case and Nutanix Support will close the case."

Before collecting additional information, upgrade NCC. For information on upgrading NCC, see KB 2871.Run a complete NCC health_check on the cluster. See KB 2871.Collect Files related logs. For more information on Logbay, see KB-3094.
	CVM logs stored in ~/data/logs/minerva_cvm*
		NVM logs stored within the NVM at ~/data/logs/minerva*
		
		To collect the file server logs, run the following command from the CVM, ideally run this on the Minerva leader as there were issues seen otherwise, to get the Minerva leader IP, on the AOS cluster, run

		nutanix@NTNX-A-CVM:~$ ncli fs ls | grep "File server status"

		Once you are on the Minerva leader CVM, run:
			nutanix@NTNX-A-CVM:~$ ncli fs ls | grep "File server status"

			For example:

			nutanix@NTNX-A-CVM:~$ ncli fs ls | grep "File server status"
			
		
	To attach files to the case, follow KB 1294.If the size of the files being uploaded is greater than 5 GB, Nutanix recommends using the Nutanix FTP server due to supported size limitations.

Requesting Assistance

If you need assistance from Nutanix Support, add a comment in the case on the support portal asking Nutanix Support to contact you. If you need urgent assistance, contact the support team by calling one of our Global Support Phone Numbers. You can also press the Escalate button in the case and explain the urgency in the comment, and then Nutanix Support will be in contact.

Closing the Case

If this KB resolves your issue and you want to close the case, click on the Thumbs Up icon next to the KB Number in the initial case email. This informs Nutanix Support to proceed with closing the case. You can also update the support case saying it is okay to close the case and Nutanix Support will close the case.. ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.