On 07/05/2020 21:40, AJ Chen wrote:
> I use eclipse to develop web app for tomcat, Web app has a dependent
> project and so the dependent project and all jars are added on the
> classpath for tomcat runtime. Log4j works on tomcat 6. But after upgrate to
> tomcat 9, log4j failed to start with the following error. Anyone has seen
> similar problem? log4j2 also failed. Thanks.

Note: log4j is no longer supported.

How, exactly, is log4j configured? What JAR files and what configuration
files are where? Any other configuration?


> log4j:ERROR A "org.apache.log4j.DailyRollingFileAppender" object is not
> assignable to a "org.apache.log4j.Appender" variable.
> log4j:ERROR The class "org.apache.log4j.Appender" was loaded by
> log4j:ERROR [sun.misc.Launcher$AppClassLoader@18b4aac2] whereas object of
> type
> log4j:ERROR "org.apache.log4j.DailyRollingFileAppender" was loaded by
> [ParallelWebappClassLoader
> aj

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