StorageGRID: How to troubleshoot "Node Down" alert

Applies to

NetApp StorageGRID

Description

This article provides generic troubleshooting steps for a node down event in StorageGRID.

One or more of the following errors may be reported:

• NDDOWN:StorageGRID Notification from XXXXXX(NODE_DOWN-CRITICAL) ERROR
• One or more StorageGRID nodes appear next to a blue icon  (Disconnected – Unknown) in the Grid Manager
• Unable to communicate with Node Alert

For all StorageGRID releases, the blue icon indicates that a node is disconnected for an unknown reason:

In the example, the Storage Node named DC1-S3 has a blue icon. The Connection State on the Node Information panel is Unknown, and the Unable to communicate with node alert is active.

Possible causes for a node down event:

• Maintenance operations such as a scheduled reboot or a software upgrade
• Network issue
• Resource exhaustion (CPU, Memory, Disk) b/c of high Workload (very busy GRID)
• Hardware issue
• Incorrect management cabling post maintenance
• VMware console not responding