By default, Maven does not compile any debug information into an artifact. This is (sometimes) reasonable when you publish libraries which you do not want to reveal too much information about. For personal use, however, I prefer to be able to have a look at the full stack trace. Another benefit of adding debugging information is that you can read the original parameter names of methods.
As debug information is added at compile time, the Maven Compiler plugin is responsible for managing this kind of information:
<build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>2.0.2</version> <configuration> <!-- Necessary in order for the debug levels to be considered--> <debug>true</debug> <debugLevel>lines,vars,source</debugLevel> </configuration> </plugin> </plugins> </build>
-  Reference of Maven Compiler plugin