CODEWITHSUNDEEP
javalog4j2java.util.logging
Tanushree Gogoi
Tanushree Gogoi

Reputation: 31

Log4j2 createOnDemand="true" does not allow creation of new file on a daily basis

Log4j2 createOnDemand="true" does not allow creation of new file on a daily basis in-spite of using RollingFile Appenders with TimeBasedTriggeringPolicy.

Below is my log4j2.xml file.

I have two appenders, one is for all logs, another is for a custom purpose, which needs to be generated only on demand, but the createOnDemand is overriding the Rolling nature of the log and it is not allowing to create new log file for the custom log.

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
    <Appenders>
        <RollingFile name="App" 
                fileName="app.log" 
                filePattern="app.%d{yyyy-MM-dd}.log">
            <PatternLayout pattern="[%t] %d{yyyy-MM-dd HH:mm:ss,SSS zzz} %-5p %l - %m%n" />
            <Policies>
                <TimeBasedTriggeringPolicy interval="1" />
            </Policies>
        </RollingFile>
        <RollingFile name="custom"
                 fileName="appCustom.log"
                 filePattern="appCustom.%d{yyyy-MM-dd-HH-mm}.log"
                 createOnDemand="true">
        <PatternLayout pattern="[%t] %d{yyyy-MM-dd HH:mm:ss,SSS zzz} %-5p %l - %m%n" />
        <Policies>
            <TimeBasedTriggeringPolicy interval="1" />
        </Policies>
        </RollingFile>
    </Appenders>
    <Loggers>
        <Logger name="AppLogger" level="info" additivity="false">
                <AppenderRef ref="App"/>
            </Logger>
        <Logger name="customLogger" level="info" additivity="false">
            <AppenderRef ref="custom"/>
        </Logger>
        <Root level="info">
                <AppenderRef ref="file" />
        </Root>
    </Loggers>
</Configuration>

Upvotes: 2

Views: 1324

Answers (2)

Kalle Richter
Kalle Richter

Reputation: 8768

The file is also not created if fileName contains one or more directories and one of them does not exists, e.g. <RollingFile fileName="logs/appCustom.log"/> fails if logs does not exist.

The directories are never created you need to take care of that yourself. Make sure you pay attention to the working directory where the directory is expected*. For example, it changes for every subproject of a Gradle project with multiple includes. Therefore you need logs in every included project.

Make sure to exclude the logs from git.

* I guess it's the current working directory. Nothing mentioned at the crucial points and I cannot check the complete 40 pages docs of appenders.

Upvotes: 0

Tanushree Gogoi
Tanushree Gogoi

Reputation: 31

I have found the fix for the above issue. This was an existing bug in lo4j2 which is fixed in the version - 2.13.1

Below are the links :

https://issues.apache.org/jira/browse/LOG4J2-2759

https://logging.apache.org/log4j/2.x/changes-report.html#a2.13.3

I was using 2.11.0

Upgrading resolved my issue.

Upvotes: 1

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