Troubleshoot the upgrade process

This topic describes common problems and errors that occur during the upgrade process and how to identify and resolve them.

To check for multiple conflicting upgrades:

The upgrade command automatically checks for multiple ucp-worker-agents, the existence of which can indicate that the cluster is still undergoing a prior manual upgrade. You must resolve the conflicting node labels before proceeding with the upgrade.

To resolve upgrade failures:

You can resolve upgrade failures on worker nodes by changing the node labels back to the previous version, but this is not supported on manager nodes.

To check Kubernetes errors:

For more information on anything that might have gone wrong during the upgrade process, check Kubernetes errors in node state messages after the upgrade is complete.