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https://issues.apache.org/jira/browse/LOG4J2-3559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17600180#comment-17600180
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ASF subversion and git services commented on LOG4J2-3559:
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Commit 18528056fd42a8360f27d9f4f8fac97d477731b9 in logging-log4j2's branch
refs/heads/dependabot/maven/org.hsqldb-hsqldb-2.7.0 from Piotr P. Karwasz
[ https://gitbox.apache.org/repos/asf?p=logging-log4j2.git;h=18528056fd ]
[LOG4J2-3559] Correct normalization problem.
Properties not starting with 'log4j' are normalized to 'LOG4J' for
environment variables and 'log4j2.' for system properties. This PR
normalizes them to `null`.
> Incorrect normalization of properties not starting with 'log4j'
> ---------------------------------------------------------------
>
> Key: LOG4J2-3559
> URL: https://issues.apache.org/jira/browse/LOG4J2-3559
> Project: Log4j 2
> Issue Type: Bug
> Components: API
> Affects Versions: 2.18.0
> Reporter: Piotr Karwasz
> Assignee: Piotr Karwasz
> Priority: Minor
> Fix For: 2.19.0
>
>
> The {{PropertiesUtil}} incorrectly returns the value of an environment
> variable called 'LOG4J' or system property 'log4j2.' when looking up
> non-existent properties that do not start with 'log4j2?'
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