Troubleshooting a Cloudera Manager Upgrade

The Cloudera Manager Server fails to start after upgrade.

Possible Reasons

There were active commands running before upgrade. This includes commands a user might have run and also commands Cloudera Manager automatically triggers, either in response to a state change, or something configured to run on a schedule, such as Backup and Disaster Recovery replication or snapshot jobs.

Possible Solutions

Stop any running commands from the Cloudera Manager Admin Console or wait for them to complete. See Aborting a Pending Command.
Ensure that you have disabled any scheduled replication or snapshot jobs from the Cloudera Manager Admin Console to complete before proceeding with the upgrade. See HDFS Replication.

Re-Running the Cloudera Manager Upgrade Wizard

Minimum Required Role: Full Administrator. This feature is not available when using Cloudera Manager to manage Data Hub clusters.

The first time you log in to the Cloudera Manager server after upgrading your Cloudera Manager software, the upgrade wizard runs. If you did not complete the wizard at that time, or if you had hosts that were unavailable at that time and still need to be upgraded, you can re-run the upgrade wizard:

Click the Hosts tab.
Click Re-run Upgrade Wizard or Review Upgrade Status. This takes you back through the installation wizard to upgrade Cloudera Manager Agents on your hosts as necessary.
Select the release of the Cloudera Manager Agent to install. Normally, this is the Matched Release for this Cloudera Manager Server. However, if you used a custom repository (instead of archive.cloudera.com) for the Cloudera Manager server, select Custom Repository and provide the required information. The custom repository allows you to use an alternative location, but that location must contain the matched Agent version.
Specify credentials and initiate Agent installation:
1. Select root for the root account, or select Another user and enter the username for an account that has password-less sudo privileges.
2. Select an authentication method:
  - If you choose password authentication, enter and confirm the password.
  - If you choose public-key authentication, provide a passphrase and path to the required key files.
  You can modify the default SSH port if necessary.
3. Specify the maximum number of host installations to run at once. The default and recommended value is 10. You can adjust this based on your network capacity.
4. Click Continue.

When you click Continue, the Cloudera Manager Agent is upgraded on all the currently managed hosts. You cannot search for new hosts through this process. To add hosts to your cluster, click the Add New Hosts to Cluster button.