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https://issues.apache.org/jira/browse/LOG4J2-2951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17466477#comment-17466477
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Gary D. Gregory commented on LOG4J2-2951:
-----------------------------------------
[~thackel]
Thank you for the confirmation.
Do upgrade to 2.17.1 though.
Also, let us know if you encounter other 1.2 bridge issues, I'd like to make
that as solid as we can.
> Properties are not resolved with Log4J1 configuration
> -----------------------------------------------------
>
> Key: LOG4J2-2951
> URL: https://issues.apache.org/jira/browse/LOG4J2-2951
> Project: Log4j 2
> Issue Type: Bug
> Components: log4j 1.2 emulation
> Affects Versions: 2.13.3
> Reporter: Thomas Hackel
> Assignee: Ralph Goers
> Priority: Major
> Fix For: 2.15.0
>
>
> When using the log4j 1.2 emulation, the resolution of variables in the
> log4j.properties does not work.
> {code:java}
> ...
> maxbackupindex=20
> log4j.appender.RFA=org.apache.log4j.RollingFileAppender
> log4j.appender.RFA.MaxBackupIndex=${maxbackupindex}
> ...
> {code}
> I've also created a sample project which shows the problem:
> [https://github.com/thackel/log4j2-legacy-test]
> The log4j1 initialization (using system property) works and the property file
> is read automatically from the classpath, just the variable substitution does
> not work.
> Whats interesting that there is an existing Testcase in Log4J, which shows
> that it somehow works:
> [Log4j1ConfigurationFactoryTest.java
> |https://github.com/apache/logging-log4j2/blob/log4j-2.13.3/log4j-1.2-api/src/test/java/org/apache/log4j/config/Log4j1ConfigurationFactoryTest.java#L159]with
> its
> [log4j.properties|https://github.com/apache/logging-log4j2/blob/log4j-2.13.3/log4j-1.2-api/src/test/resources/config-1.2/log4j-RollingFileAppender-with-props.properties].
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