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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9364) Unnecessary DNS resolution attempts when creating NameNodeProxies
Date Fri, 06 Nov 2015 22:09:11 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9364?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14994550#comment-14994550
] 

Zhe Zhang commented on HDFS-9364:
---------------------------------

Thanks for clarifying this Xiao. I agree with the approach in 03 patch. So +1 pending the
minor fix.

> 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
>          Components: ha, performance
>            Reporter: Xiao Chen
>            Assignee: Xiao Chen
>         Attachments: HDFS-9364.001.patch, HDFS-9364.002.patch, HDFS-9364.003.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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