Artur Burnos created LOG4J2-872:
-----------------------------------

             Summary: Property substitution works incorrectly for filePattern 
in RollingFile appender
                 Key: LOG4J2-872
                 URL: https://issues.apache.org/jira/browse/LOG4J2-872
             Project: Log4j 2
          Issue Type: Bug
          Components: Appenders
    Affects Versions: 2.0.2
         Environment: Win 7 64, Tomcat 7.0.23, Log4j2 2.0.2
            Reporter: Artur Burnos
            Priority: Minor


I am trying to configure RollingFile appender in tomcat 7.0.23 with 
log4j2(2.0.2) with 10 log files.

I am using in the filePattern the ${sys:catalina.base}, it doesn't work and log 
files are placed in tomcat/bin/${sys:catalina.base}/ directory.

The interesting part is that the first log file (without a number) is created 
ok, under tomcat/logs - which means it succeeds to map the filename attribute 
to a real path.

When I replace ${sys:catalina.base} with 
filePattern="C:/apache-tomcat-7.0.23/logs/app.%i.log" it works.

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
    <Appenders>
        <Console name="CONSOLE" target="SYSTEM_OUT">
            <PatternLayout pattern="%d %-5p [%X{REQ_ID}] [%c{1}] %m%n"/>
        </Console>
        <RollingFile name="FILE" fileName="${sys:catalina.base}/logs/app.log"
                     filePattern="${sys:catalina.base}/logs/app.%i.log">
            <PatternLayout pattern="%d %-5p [%X{REQ_ID}] [%c{1}] %m%n"/>
            <Policies>
                <SizeBasedTriggeringPolicy size="10 MB" />
            </Policies>
            <DefaultRolloverStrategy max="10"/>
        </RollingFile>
    </Appenders>
    <Loggers>
        <Root level="info">
            <appender-ref ref="CONSOLE" />
            <appender-ref ref="FILE" />
        </Root>
    </Loggers>
</Configuration>

Meaning that the filePattern is not interpreted properly.

How do I overcome this without having to specify the log directory statically? 



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