The rabbitmqctl node_health_check command can be used to determine if a node is functioning properly.

~]# rabbitmqctl node_health_check
Timeout: 70.0 seconds
Checking health of node rabbit@server1
Health check passed

If the health check fails, something like this should be displayed.

~]# rabbitmqctl node_health_check
Timeout: 70 seconds ...
Checking health of node rabbit@server001 ...
Error:
Error: healthcheck failed. Message: cluster partition in effect: [rabbit@server001,rabbit@server002]

The --formatter json option can be used to return the output in JSON.

rabbitmqctl node_health_check --formatter json