How to log to a file from an Eclipse RCP application? - eclipse-plugin

Question

I can't log to a file from my eclipse rcp application.
So, I followed the guide on https://www.vogella.com/tutorials/EclipseLogging/article.html.
I installed Logback SLF4J Binding, logback classic module and logback core module from orbit repository.
I created a plugin that read the config file logback.xml. That plugin require ch.qos.logback.classic & ch.qos.logback.core. I also imported org.sl4j.
I imported org.slf4j on the other plugins.
Here is the logback.xml file :
<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="true">
<statusListener class="ch.qos.logback.core.status.OnConsoleStatusListener" />
<property name="HOME_LOG" value="d://logFiles/app.log"/>
<appender name="FILE" class="ch.qos.logback.core.FileAppender">
<file>${HOME_LOG}</file>
<encoder>
<Pattern>
%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} -FILE- %msg%n
</Pattern>
</encoder>
</appender>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<layout class="ch.qos.logback.classic.PatternLayout">
<Pattern>
%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} -OUT- %msg%n
</Pattern>
</layout>
</appender>
<logger name="fr.test.sirius.logger" level="debug"
additivity="false">
<appender-ref ref="STDOUT" />
<appender-ref ref="FILE"/>
</logger>
<root level="debug">
<appender-ref ref="STDOUT" />
<appender-ref ref="FILE"/>
</root>
</configuration>
When I launch my Eclipse RCP application with "run as" everything is working as attended.
When I create an update site and install the feature on Eclipse, the log file is not created. I tried to launch eclipse with -console argument, the logs are printed correctly in the OSGi console.
edit: The logs are not printed correctly in the OSGI console, seems like an issue with the activator.
Thanks