[ERROR][bootstrap] {1.2.2}: Initialization Failed ... - NullPointerException[null]

Finally! the node can now added/remove to the cluster with only four lines

cluster.name: Cluster
node.name: "[node?]"
discovery.zen.ping.multicast.enabled: false
discovery.zen.ping.unicast.hosts: ["node?"]

May next question is, where can I dump the data sources (using S3 or EBS),
why?
Then, how the data sources can now access by ES?

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