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https://issues.apache.org/jira/browse/LOG4J2-2104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ralph Goers resolved LOG4J2-2104.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 2.11.0

The look was changed to properly loop over the parents.

> LoaderUtil getClassLoaders() method and while loops
> ---------------------------------------------------
>
>                 Key: LOG4J2-2104
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-2104
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 2.9.1
>            Reporter: Andrejus Chaliapinas
>            Assignee: Ralph Goers
>            Priority: Minor
>             Fix For: 2.11.0
>
>
> For v2.9.1 inside org.apache.logging.log4j.util.LoaderUtil and 
> getClassLoaders() method we have lines 120-123 as such:
> ClassLoader parent = tcl;
> while (parent != null && !classLoaders.contains(parent)) {
>     classLoaders.add(parent);
> }
> where it looks like some getParent() call is either missing or otherwise 
> "while" loop is not needed.
> In line 111 tcl classloader already added into list of clasloaders:
> classLoaders.add(tcl);
> Was it an attempt to add all classloaders hierarchy or just some immediate 
> parents?



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