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https://issues.apache.org/jira/browse/LUCENE-6921?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uwe Schindler updated LUCENE-6921:
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Attachment: LUCENE-6921-fix.patch
Fix.
> Fix SPIClassIterator#isParentClassLoader to don't require extra permissions
> ---------------------------------------------------------------------------
>
> Key: LUCENE-6921
> URL: https://issues.apache.org/jira/browse/LUCENE-6921
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Priority: Minor
> Fix For: Trunk, 5.5
>
> Attachments: LUCENE-6921-fix.patch, LUCENE-6921.patch,
> LUCENE-6921.patch
>
>
> This is not really a big issue, because most setups use a "good" context
> classloader. The context classloader is required by the Java ServiceProvider
> standard to look for META-INF classes. To work around issues in some setups,
> the analysis and codec SPIs also scan our own classloader, if it is not a
> parent of the context one. This check requires permissions, if we are not a
> parent.
> This will fix the parent check to simply return false (and enforce classpath
> rescan) if we don't have enough permissions. This is the right thing to do,
> because if we have no permissions, we are also not a parent!
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