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Posted to common-issues@hadoop.apache.org by "Sangjin Lee (JIRA)" <ji...@apache.org> on 2017/03/31 17:12:41 UTC
[jira] [Commented] (HADOOP-13398) prevent user classes from loading
classes in the parent classpath with ApplicationClassLoader
[ https://issues.apache.org/jira/browse/HADOOP-13398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15951309#comment-15951309 ]
Sangjin Lee commented on HADOOP-13398:
--------------------------------------
Ping. Any feedback on this patch is greatly appreciated. Thanks!
> prevent user classes from loading classes in the parent classpath with ApplicationClassLoader
> ---------------------------------------------------------------------------------------------
>
> Key: HADOOP-13398
> URL: https://issues.apache.org/jira/browse/HADOOP-13398
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: util
> Reporter: Sangjin Lee
> Assignee: Sangjin Lee
> Priority: Critical
> Attachments: HADOOP-13398-HADOOP-13070.01.patch, HADOOP-13398-HADOOP-13070.02.patch, HADOOP-13398-HADOOP-13070.03.patch, HADOOP-13398-HADOOP-13070.04.patch, hadoop-13398-notes.pdf
>
>
> Today, a user class is able to trigger loading a class from Hadoop's dependencies, with or without the use of {{ApplicationClassLoader}}, and it creates an implicit dependence from users' code on Hadoop's dependencies, and as a result dependency conflicts.
> We should modify {{ApplicationClassLoader}} to prevent a user class from loading a class from the parent classpath.
> This should also cover resource loading (including {{ClassLoader.getResources()}} and as a corollary {{ServiceLoader}}).
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