I tried to use log4j-over-slf4j in a legacy project that provides its own LoggerFactory and when I use log4j-over-slf4j I get a java.lang.NoSuchMethodError for Logger#getLogger(String name, LoggerFactory factory). After having inspected the log4j-over-slf4j source code, it seems that the bridge does not provide an implementation for the Logger#getLogger(String name, LoggerFactory factory) method. Is there any reason for that?