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https://issues.apache.org/jira/browse/HDFS-9364?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14988984#comment-14988984
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J.Andreina commented on HDFS-9364:
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[~xiaochen] ,thanks for raising this issue.Patch looks good to me.
I have few review comments.
1.
Following place also requires a check on whether NNURI is logical or not.
{{DFSUtilClient#getNNAddress(Configuration conf)}} --> should
internally call {{DFSUtilClient#getNNAddressCheckLogical()}}
2.
As the check on NNURI is logical, is not necessary for Non-HA cluster,in patch
checks at following places is not required
{{NameNodeProxies#createProxy}}
{{NameNodeProxiesClient#createProxyWithClientProtocol}}
> Unnecessary DNS resolution attempts when creating NameNodeProxies
> -----------------------------------------------------------------
>
> Key: HDFS-9364
> URL: https://issues.apache.org/jira/browse/HDFS-9364
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Xiao Chen
> Assignee: Xiao Chen
> Attachments: HDFS-9364.001.patch
>
>
> When creating NameNodeProxies, we always try to DNS-resolve namenode URIs.
> This is unnecessary if the URI is logical, and may be significantly slow if
> the DNS is having problems.
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