I have a jetty webapp running with log4j2. It is not logging anything and there is the following error on startup:
ERROR StatusLogger LogManager returned an instance of org.apache.logging.slf4j.SLF4JLoggerContextFactory which does not implement org.apache.logging.log4j.core.impl.Log4jContextFactory. Unable to initialize Log4j.
My logging code:
org.apache.logging.log4j.Logger logger = org.apache.logging.log4j.LogManager.getLogger(MyClass.class);
logger.info("something");
log4j2.xml:
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
<Properties>
<property name="layout.pattern">%d %5p %c{1.} [%t] %m%n</property>
</Properties>
<Appenders>
<Console name="consoleAppender">
<PatternLayout pattern="${layout.pattern}" />
</Console>
<RollingFile name="rollingFileAppender">
<FileName>logs/app.log</FileName>
<FilePattern>logs/%d{yyyy-MM-dd}-app.log</FilePattern>
<PatternLayout pattern="${layout.pattern}" />
<Policies>
<TimeBasedTriggeringPolicy />
<SizeBasedTriggeringPolicy size="250 MB" />
</Policies>
<DefaultRolloverStrategy fileIndex="nomax" />
</RollingFile>
</Appenders>
<Loggers>
<Root level="info">
<AppenderRef ref="consoleAppender" />
</Root>
<Logger name="com.app" level="all"
additivity="false">
<AppenderRef ref="consoleAppender" />
<AppenderRef ref="rollingFileAppender" />
</Logger>
</Loggers>
</Configuration>
What is wrong?
not exactly sure what was the problem but i think it was a conflict with spring boot logger and log4j2. i managed to resolved the issue by exluding the dependency in my maven pom.xml:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>