Starting executable war with -Djava.util.logging.manager=org.apache.logging.log4j.jul.LogManager produces a ClassNotFoundException #12659
Description
I would like to use Log4j2 as the logging implementation. As per the documentation here: https://docs.spring.io/spring-boot/docs/current/reference/html/howto-logging.html#howto-configure-log4j-for-logging, I have set the following system property: -Djava.util.logging.manager=org.apache.logging.log4j.jul.LogManager.
The following error is printed at startup:
Could not load Logmanager "org.apache.logging.log4j.jul.LogManager"
java.lang.ClassNotFoundException: org.apache.logging.log4j.jul.LogManager
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:93)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.util.logging.LogManager$1.run(LogManager.java:195)
at java.util.logging.LogManager$1.run(LogManager.java:181)
at java.security.AccessController.doPrivileged(Native Method)
at java.util.logging.LogManager.<clinit>(LogManager.java:181)
at java.util.logging.Logger.demandLogger(Logger.java:448)
at java.util.logging.Logger.getLogger(Logger.java:502)
at com.sun.jmx.remote.util.ClassLogger.<init>(ClassLogger.java:55)
at javax.management.NotificationBroadcasterSupport.<clinit>(NotificationBroadcasterSupport.java:365)
at javax.management.MBeanServerDelegate.<init>(MBeanServerDelegate.java:72)
at com.sun.jmx.mbeanserver.MBeanServerDelegateImpl.<init>(MBeanServerDelegateImpl.java:100)
at com.sun.jmx.mbeanserver.JmxMBeanServer.newMBeanServerDelegate(JmxMBeanServer.java:1374)
at javax.management.MBeanServerBuilder.newMBeanServerDelegate(MBeanServerBuilder.java:66)
at javax.management.MBeanServerFactory.newMBeanServer(MBeanServerFactory.java:321)
at javax.management.MBeanServerFactory.createMBeanServer(MBeanServerFactory.java:231)
at javax.management.MBeanServerFactory.createMBeanServer(MBeanServerFactory.java:192)
at java.lang.management.ManagementFactory.getPlatformMBeanServer(ManagementFactory.java:469)
at org.apache.logging.log4j.core.jmx.Server.reregisterMBeansAfterReconfigure(Server.java:139)
at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:556)
at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:617)
at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:634)
at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:229)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:153)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
at org.apache.logging.log4j.LogManager.getContext(LogManager.java:194)
at org.apache.commons.logging.LogFactory$Log4jLog.<clinit>(LogFactory.java:199)
at org.apache.commons.logging.LogFactory$Log4jDelegate.createLog(LogFactory.java:166)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:109)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:99)
at org.springframework.boot.SpringApplication.<clinit>(SpringApplication.java:198)
at com.example.Application.main(Application.java:10)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)
at org.springframework.boot.loader.WarLauncher.main(WarLauncher.java:58)
Attached is a sample project that demonstrates the problem. Build it with "mvn package", unzip the log4j-war-example-1.0.0-SNAPSHOT.zip and run bin/run.sh.
I am using Spring Boot 2.0.0.