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E-Series E4000 controller reporting inter controller communication failure

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Applies to

  • NetApp E-Series
  • NetApp E4000 
  • NetApp StorageGRID Appliances

Issue

  • Recovery Guru reports AUX_ALT_COMM_LINK_ERROR-Recovery Failure Type Code: 503
  • MAJOR-EVENT-LOG reports critical event

Event type: 1406
Event category: Failure
Priority: Critical
Event needs attention: true
Event send alert: true
Event visibility: true
Description: Link issues have been encountered on an alternate controller Ethernet channel
Event specific codes: 0/0/0
Component type: Controller
Component location: Shelf 99, Bay A
Logged by: Controller in bay A

  • WEB-SERVER-TRACE-LOGS on both Controllers may record:

2026-02-17 19:32:26,204 WARN [ActiveMQ Task-945] o.a.a.t.f.FailoverTransport [FailoverTransport.java:1109] [requestId=0, deviceId=N/A] Failed to connect to [nio://dom0-alt:61616] after: 944540 attempt(s) with No route to host, continuing to retry.

2026-02-17 19:33:00,001 INFO [ClusterManager-1] c.n.e.a.d.c.AltMessageBrokerClientImpl [AltMessageBrokerClientImpl.java:340] [requestId=0, deviceId=N/A] Alt message dropped, session not established

 

 

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