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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14676) Wrong default value for "fs.du.interval"
Date Sat, 22 Jul 2017 01:41:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14676?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16097058#comment-16097058
] 

Konstantin Shvachko commented on HADOOP-14676:
----------------------------------------------

I traced it all the way to 2.6.1.
DataNodes on our cluster were using too much system time and it was traced to frequent {{statfs}}.
Thanks [~ga] for digging into this.
The workaround is to actually specify the default value in {{core-site.xml}}, then it will
not use the fake default. But we should fix it.

> Wrong default value for "fs.du.interval"
> ----------------------------------------
>
>                 Key: HADOOP-14676
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14676
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: common, conf, fs
>    Affects Versions: 2.6.1
>            Reporter: Konstantin Shvachko
>
> According to {{core-default.xml}} the default value of {{fs.du.interval = 60 sec}}. But
the implementation of {{DF}} substitutes 3 sec instead. The problem is that {{DF}} uses outdated
constant {{DF.DF_INTERVAL_DEFAULT}} instead of the correct one {{CommonConfigurationKeysPublic.FS_DU_INTERVAL_DEFAULT}}.



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