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From "Jonathan Hung (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-12825) Log slow name resolutions
Date Tue, 30 May 2017 20:37:05 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-12825?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Hung updated HADOOP-12825:
-----------------------------------
    Status: Patch Available  (was: Reopened)

> Log slow name resolutions 
> --------------------------
>
>                 Key: HADOOP-12825
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12825
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Sidharta Seethana
>            Assignee: Sidharta Seethana
>             Fix For: 3.0.0-alpha1, 2.7.2, 2.8.0
>
>         Attachments: getByName-call-graph.txt, HADOOP-12825.001.patch, HADOOP-12825.002.patch,
HADOOP-12825-branch-2.7.001.patch
>
>
> Logging slow name resolutions would be useful in identifying DNS performance issues in
a cluster. Most resolutions go through {{org.apache.hadoop.security.SecurityUtil.getByName}}
( see attached call graph ). Adding additional logging to this method would expose such issues.



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