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https://issues.apache.org/jira/browse/HDFS-3404?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13273489#comment-13273489
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Aaron T. Myers commented on HDFS-3404:
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I just tested out this patch manually on a 2-node HA cluster and it worked as
expected. Each node is able to checkpoint to the other, even though each node
has bound both its own RPC and HTTP addresses 0.0.0.0. Each node need only have
the RPC address of the other node set to an actual address for everything to
work properly.
> Make putImage in GetImageServlet infer remote address to fetch from
> -------------------------------------------------------------------
>
> Key: HDFS-3404
> URL: https://issues.apache.org/jira/browse/HDFS-3404
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 2.0.0
> Reporter: Aaron T. Myers
> Assignee: Aaron T. Myers
> Attachments: HDFS-3404.patch, HDFS-3404.patch
>
>
> As it stands, daemons which perform checkpointing must determine their own
> address on which they can be reached, so that the NN which they checkpoint
> against knows what address to fetch a merged fsimage from. This causes
> problems if, for example, the daemon performing checkpointing binds to
> 0.0.0.0, and thus can't be sure of what address the NN can reach it at.
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