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https://issues.apache.org/jira/browse/HDFS-9364?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiao Chen updated HDFS-9364:
----------------------------
Attachment: HDFS-9364.001.patch
Patch 001 fixes the unnecessary DNS resolution by checking against configured
service name. Added a test similar to what HADOOP-9150 did to guarantee the URI
is not DNS-resolved.
The original {{DFSUtilClient#getNNAddress(URI)}} is untouched, given that: 1.
It's public; 2. We need configuration to check URI logicality.
> Unnecessary DNS resolution attempts when 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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