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https://issues.apache.org/jira/browse/HADOOP-5740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12702462#action_12702462
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Steve Loughran commented on HADOOP-5740:
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Probable cause for this is that ConfiguredPolicy doesnt override
{{PermissionCollection getPermissions(CodeSource codesource)}}
In Java5 Policy.getPermissions(CodeSource codesource) returned a mutable
PermissionCollection, but in Java6 that method returns an immutable one.
This will be easy to test without running under a security manager, so easy to
test that an overridden version of the method does the right thing
> Hadoop JSP pages don't work under a security manager
> ----------------------------------------------------
>
> Key: HADOOP-5740
> URL: https://issues.apache.org/jira/browse/HADOOP-5740
> Project: Hadoop Core
> Issue Type: Bug
> Components: fs, mapred
> Affects Versions: 0.21.0
> Reporter: Steve Loughran
> Priority: Minor
>
> When you run Hadoop under a security manager that says "yes" to all security
> checks, you get stack traces when Jetty tries to initialise the JSP engine.
> Which implies you can't use Jasper under a security manager
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