Github user kwmonroe commented on the issue:
https://github.com/apache/bigtop/pull/151
I think you're saying the `namenode_hosts[host, index]` loop is the only
difference, but that's a pretty big difference. The hdfs-site.xml property
keys are not the same in HA and non-HA cases.
For example, property key in HA:
`dfs.namenode.rpc-address.<%= @nameservice_id %>.nn<%= idx+1 %>`
Same property key for non-HA:
`dfs.namenode.rpc-address`
By the time we check for a single item list and have an `if/else` block
rendering different properties based on that list size, I think we're no better
than we are now.
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