spring-boot-starter-log4j2 OnStartupTriggeringPolicy never rolls file when starting up

[kunlk]

I use spring-boot-starter-log4j2 in my project, and here is maven dependency:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-log4j2</artifactId>
    <version>2.2.1.RELEASE</version>
</dependency>

In log4j2.xml, I'd like to use OnStartupTriggeringPolicy to roll log file when app starting, however when starting application, the log file was overwritten other than archive. Here is RollingFile definition:

<RollingFile name="RollingFile">
        <FileName>logs/app.log</FileName>
        <FilePattern>logs/app_%d{yyyy-MM-dd-HH-mm}-%i.log</FilePattern> 
        <PatternLayout>
        <Pattern>%d [%-5p] (%t:%F:%L) - %m%n</Pattern>
        </PatternLayout>
        <Policies>
            <OnStartupTriggeringPolicy />
            <SizeBasedTriggeringPolicy size="10 MB" />
            <TimeBasedTriggeringPolicy interval="1"/>
        </Policies>
          <DefaultRolloverStrategy max="100" />
</RollingFile>

[wilkinsona]

Can you please provide a complete sample that reproduces the problem?

[wilkinsona]

I see you’ve also asked this on Stack Overflow. To avoid people wasting time, it’s better to only ask in one place at a time. I’m going to close this in favour of your question on Stack Overflow. Please update the question with a minimal, complete, and verifiable example.