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https://issues.apache.org/jira/browse/HDFS-12532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16179095#comment-16179095
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Brahma Reddy Battula commented on HDFS-12532:
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[~daryn] thanks a lot for taking a look into this issue.
bq.That principal does have a hostname. Did you mean h...@hadoop.com?
Supposed to tell,{{hostname}} which is not resolvable i.e
hdfs/hadoop.hadoop....@hadoop.com. Here hadoop.hadoop.com is n't configured as
hostname
bq.Is floating ip a dynamic dhcp address? If yes, is this for testing? Anyway,
I need to understand more about X.Y.Y.1 and X.Y.Y.100. I'm assuming X.Y.Y.1 is
localhost/127.0.0.1? X.Y.Y.100 is the dhcp assigned address?
Floating IP configured for HA purpose.Such that Active and standby can use same
IP to access webUI.*Here datanode registered with X.Y.Y.1 and X.Y.Y.100 is
floating IP which is used for further communication which will fail.*
bq.Here's the problem with your proposal: "getLocalHost" will attempt to
resolve the system assigned hostname, which you are assuming will always be in
/etc/hosts,
I was in assumption of host mapping will be configured for hadoop cluster.
Ok, then we can make it configurable..?
> DN Reg can Fail when principal doesn't contain hostname and floatingIP is
> configured.
> -------------------------------------------------------------------------------------
>
> Key: HDFS-12532
> URL: https://issues.apache.org/jira/browse/HDFS-12532
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Brahma Reddy Battula
> Assignee: Brahma Reddy Battula
>
> Configure principal without hostname (i.e hdfs/had...@hadoop.com)
> Configure floatingIP
> Start Cluster.
> Here DN will fail to register as it can take IP which is not in "/etc/hosts".
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