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Ok, you yourself gave the partial answer, it may not be an issue. But, one may have not created the "authorized_keys" file under node 1, with "Public key" of node 2 and node3, if you add those keys...

The very interesting question is why are you trying to ssh to same host?

Yes, it will ask you for password when you try to connect. Unless you want to add its "public key" to "authorized_keys"...