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Posted to common-dev@hadoop.apache.org by "Jonathan Hung (JIRA)" <ji...@apache.org> on 2017/05/30 20:36:05 UTC

[jira] [Reopened] (HADOOP-12825) Log slow name resolutions

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

Jonathan Hung reopened HADOOP-12825:
------------------------------------

> 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: 2.8.0, 2.7.2, 3.0.0-alpha1
>
>         Attachments: getByName-call-graph.txt, HADOOP-12825.001.patch, HADOOP-12825.002.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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