### Human: Can you tell about Alert - A400120 - CalmIDFError. ### Assistant: Investigating CalmIDFError alerts on a Nutanix cluster. Note: Nutanix Self-Service was formerly known as Calm.

This Nutanix article provides the information required for troubleshooting the alert CalmIDFError for your Nutanix cluster.

Alert Overview

The CalmIDFError alert is generated when there are IDF errors in Calm.

Case: Registration of an entity type has failed

	This also results in the subsequent failure of migration of this entity. This usually happens because there are a large number of entities present for the given entity type. The connection between Calm and IDF times out (default 5-minute timeout) between entity registration, which causes this issue.
	

Sample Alert

Block Serial Number: 16SMXXXXXXXX

Output messaging

Check ID400120DescriptionError in Calm related to IDFCause of failureIDF related error in CALMResolutionPlease refer to KB-14577ImpactDB Seed or Calm Entity migration might fail. Calm Service will get impactedAlert IDA400120Alert TitleIDF error in CalmAlert MessageIDF error: message. Troubleshooting and Resolving the Issue

Case: Registration of an entity type has failed

	Restarting the nucalm docker container might fix the issue. On restarting, Calm tries to re-register the entities required and if there were intermittent issues related to IDF, they might get resolved.

	Steps to restart nucalm container:

	Log in to Prism Central (PC).Execute:
		nutanix@pcvm$ svmips

		This shall output the Prism Central IPs where you need to restart nucalm container.
		Log in to each Prism Central IP and execute:
		nutanix@pcvm$ svmips

		After successfully executing the above command, you should see a list of services running on Prism Central with nucalm: [] indicating the nucalm docker container has stopped.
		Now execute:
		nutanix@pcvm$ svmips

		After successfully starting the container, you should again see a list of services on Prism Central. This time, nucalm should have some values associated with it.
		Now, to verify if all the entities were seeded successfully, you can check for the nucalm container logs present at ~/data/logs/nucalm.out. After restarting the container, if you see log traces like the one below, then the registration is still failing.
		nutanix@pcvm$ svmips

		If you do not see the above error trace, the CALM entities have been registered successfully in the IDF.
		
	

If you need assistance or in case the above-mentioned steps do not resolve the issue, consider engaging Nutanix Support at https://portal.nutanix.com. Collect additional information and attach them to the support case.

Collecting Additional Information

Before collecting additional information, upgrade NCC. For information on upgrading NCC, see KB 2871.Collect the NCC output file ncc-output-latest.log. For information on collecting the output file, see KB 2871.Collect Logbay bundle using the following command. For more information on Logbay, see KB 6691.
	nutanix@pcvm$ svmips
	

Attaching Files to the Case

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.. ### 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.