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From "Erik Krogen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10798) Make the threshold of reporting FSNamesystem lock contention configurable
Date Fri, 26 Aug 2016 17:29:21 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10798?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15439434#comment-15439434

Erik Krogen commented on HDFS-10798:

1. Fair. It seems many keys in DFSConfigKeys follow the "replace spaces with periods" convention
but I agree that the hierarchy convention is more intuitive. I have submitted a new patch.

2. All of these tests pass locally. They do not seem related to this change. 

> Make the threshold of reporting FSNamesystem lock contention configurable
> -------------------------------------------------------------------------
>                 Key: HDFS-10798
>                 URL: https://issues.apache.org/jira/browse/HDFS-10798
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: logging, namenode
>            Reporter: Zhe Zhang
>            Assignee: Erik Krogen
>              Labels: newbie
>         Attachments: HDFS-10789.001.patch, HDFS-10789.002.patch
> Currently {{FSNamesystem#WRITELOCK_REPORTING_THRESHOLD}} is set at 1 second. In a busy
system a lower overhead might be desired. In other scenarios, more aggressive reporting might
be desired. We should make the threshold configurable.

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