Troubleshooting classic cluster registration errors (CCMv1)
While trying to resume the registration process, you can identify the problem behind the error and fix it.
Issues during registration in CDP
Error or issue details | Resolution |
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Alert: Registration is pending for a cluster with the same details. | A cluster with the same IP Address and Datacenter cannot registered again. Check if you have registered this cluster already. To check this, navigate to the Classic Clusters page and search for your cluster in the list. Check if the IP address is correct. Provide a different DataCenter name. |
Cluster side issues
Error or issue details | Resolution |
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When installing the AutoSSH rpm on a cluster node, fetching the
ccm-autossh-client rpm package failed. Multiple mirrors were tried but a
lot of them resulted in 404/ timed out errors. |
Install autossh independently and then try installing the script.
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Connection refused even though the systemctl status ccm-tunnel@CM.service shows that the autossh client is running.
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Make sure you copied the right ssh setup files for the cluster or check if the port
number CCM_TUNNEL_SERVICE_PORT in cm_reverse_tunnel.conf or
cluster_connectivity.conf is your Cloudera Manager's port number. |
When running install script on cluster node, the ssh tunnel could not be established (as indicated in the logs generated using journalctl -xe). | Check if outbound connection to CDP or HDP control plane (host/port = CCM_HOST/CCM_SSH_PORT) is allowed. Make sure to check the firewall rules. |
Test connection failure |
Try the following:
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CCM issues
Classic Clusters registration uses CCM, enabled by the installation of the CCM client and secrets on the CM node.
Error or issue details | Resolution |
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Unable to get endpoint from CCM for key <key> | The Network Load Balancers (NLBs) might be unreachable.
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Other issues
Error or issue details | Resolution |
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If Cluster name and Display name are different, few details are missing from the cluster detail page. | Cluster name and Display name must be the same. |