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From Ed Sweeney <ed.swee...@falkonry.com>
Subject Datanode denied communication with namenode
Date Sat, 26 Jul 2014 19:30:36 GMT

New AWS cluster with Cloudera 4.3 RPMs.

dfs.hosts contains 3 host names, they all resolve from each of the 3 hosts.

the datanode on the same machine as the namenode starts fine (once I
added it's longname hostname to dfs.hosts file).

the 2 remote datanodes both get the error below.

Datanode denied communication with namenode because hostname cannot be
resolved (ip=, hostname=

It is AWS VPC so no reverse dns and I don't want to add anything to
the /etc/hosts files - shouldn't have to since the long and short
names all resolve properly.

Seeing hostname field in the error message has the ip field, I tried
using dfs.client.use.datanode.hostname = true but no change.

Any help appreciated!


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