"Node statistics not available" shown on Node

[R@M$]

Hi ,

I have a 3 node cluster and during one of the restart after a node was down we started seeing this error "Node statistics not available" and we are unable to login through Node A & Node B. 

RabbitMQ 3.6.10, Erlang 19.3.6.2

Name	File descriptors	Socket descriptors	Erlang processes	Memory	Disk space	Rates mode	Info	Reset stats DB	+/-
rabbit@Node a	Node statistics not available
rabbit@Node b	Node statistics not available
rabbit@Node c	798 65536 available	65 58890 available	2020 1048576 available	174MB 12GB high watermark	89GB 48MB low watermark	basic	Disc 5

Please share what could be the root cause for this and probable solution to get the nodes back.

Note: Node A & B are running.

Thank you.

[Stuart Johnston]

I would suggest that you upgrade to a support version v3.8.2 

Usually this means that a network blip has occurred and a restart of the rabbitMQ on that server will resolve the issue

What is the view from the other two servers ? Are there any errors reported within your logfiles ?

Best Regards

Stuart