To be usable in your configuration a Log4j 1.2 Appender cannot be a Log4j2 plugin. You would configure it exactly as you do in log4j 1.x, via its class name.
That said, Do you really need your custom RollingFileAppender? The RollingFileAppender in Log4j 2 has many more options than Log4j 1 did. Ralph > On Mar 29, 2022, at 10:58 AM, Pablo Rogina <pabl...@gmail.com> wrote: > > Hi, > > I have an old application using Log4j 1.2.x and we're using Log4j 1.2 > Bridge from Log4j 2.17.2 to mitigate some vulnerabilities while > minimizing source code changes. > The application uses Log4j v1 properties file for configuration. > > We developed a custom appender by extending RollingFileAppender and > it's contained in its own JAR file. > With all components in place (log4j-api.jar, log4j-1.2-api.jar, > log4j-core.api, custom-appender.jar) most of the properties are > processed and appenders, layouts are created. > However this warning appears (application launched with -Dlog4j2.debug=true): > WARN StatusLogger Unable to load plugin class name > com.mycompany.log4j.CustomAppender with key > com.mycompany.log4j.customappender > > And then the maxFileSize for log files and backup index files are messed up. > > I found the "packages" attribute from Configuration but I was not able > to make it work: > 1. given that we're not using an XML or JSON configuration file I > don't know how to set the "packages" property for Configuration in a > log4j v1 properties file > 2. tried system variable > -Dlog4j.plugin.packages=com.mycompany.log4j.CustomAppender > > Thank you. > > Pablo Rogina > > --------------------------------------------------------------------- > To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org > For additional commands, e-mail: log4j-user-h...@logging.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-user-h...@logging.apache.org
