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https://issues.apache.org/jira/browse/HADOOP-13949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15800724#comment-15800724
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DENG FEI commented on HADOOP-13949:
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[[email protected]] Thank you for your detailed answer,you are right.
Because met several DNS server failure , so we adopted the IP.
And replace Kerberos with little nested authentication mechanism.
> Hadoop could provide IP instead of hostname to represent the node, which can
> reduce the DNS hostname resolution consumption
> ---------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-13949
> URL: https://issues.apache.org/jira/browse/HADOOP-13949
> Project: Hadoop Common
> Issue Type: Improvement
> Components: common
> Reporter: DENG FEI
>
> Normally,Hadoop use hostname represent the node,such as
> datanode,nodemanager,will lookup nameserver at rack resolve or create rpc
> connnect .
> May be could provide a chance use ip walk around dns resolution.
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