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NetApp Knowledge Base

StorageGRID: How to troubleshoot "Node Down" alert

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storagegrid
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sgrid
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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 clipboard_eb959eb70f34a0a55fc7f4f711b3728c6.png (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.

1089486-1.jpg

 

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

 

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