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From "Haohui Mai (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9241) HDFS clients can't construct HdfsConfiguration instances
Date Fri, 16 Oct 2015 16:42:06 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9241?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14960987#comment-14960987
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Haohui Mai commented on HDFS-9241:
----------------------------------

bq. the changes for the hdfs client classpath make instantiating HdfsConfiguration from the
client impossible; it only lives server side. This breaks any app which creates one.

I'm trying to understand the use cases of applications creating a {{HdfsConfiguration}} instance.
Is it because that the apps need a way to force the hdfs configurations to be loaded?

Old applications can still depend on {{hadoop-hdfs}} and nothing will break. However, the
application might need to change a couple lines of code if it only wants to depend on {{hadoop-hdfs-client}}.
Thoughts?

> HDFS clients can't construct HdfsConfiguration instances
> --------------------------------------------------------
>
>                 Key: HDFS-9241
>                 URL: https://issues.apache.org/jira/browse/HDFS-9241
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs-client
>            Reporter: Steve Loughran
>            Assignee: Mingliang Liu
>         Attachments: HDFS-9241.000.patch
>
>
> the changes for the hdfs client classpath make instantiating {{HdfsConfiguration}} from
the client impossible; it only lives server side. This breaks any app which creates one.
> I know people will look at the {{@Private}} tag and say "don't do that then", but it's
worth considering precisely why I, at least, do this: it's the only way to guarantee that
the hdfs-default and hdfs-site resources get on the classpath, including all the security
settings. It's precisely the use case which {{HdfsConfigurationLoader.init();}} offers internally
to the hdfs code.
> What am I meant to do now? 



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