[jira] [Commented] (HADOOP-13400) update the ApplicationClassLoader implementation in line with latest Java ClassLoader implementation

["Vrushali C (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-13400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15394818#comment-15394818 ] 

Vrushali C commented on HADOOP-13400:
-------------------------------------

I am looking into this. The ApplicationClassloader overloads getResource(String) and loadClass APIs. I have the updated code ready for loadClass. Don't see much in the getResource function to modify. 

I believe getResources is being handled as part of  HADOOP-13398.

There are some new APIs around assertion status for this class loader in the 1.8 Classloader class. I am not completely clear if the ApplicationClassloader needs to do anything different here. 

> update the ApplicationClassLoader implementation in line with latest Java ClassLoader implementation
> ----------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-13400
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13400
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: util
>            Reporter: Sangjin Lee
>            Assignee: Vrushali C
>
> The current {{ApplicationClassLoader}} implementation is aged, and does not reflect the latest java {{ClassLoader}} implementation. One example is the use of the fine-grained classloading lock.



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