Hello. I am trying to integrate Logback for the first time in a project of mine, and i'm having such a hard time trying to use it along with Spring 3.0.5. I declared jcl-over-slf4j dependency so it replaces commons-logging used by spring-core, but it seems like something is missing or wrong: java.lang.NoSuchMethodError: org.slf4j.spi.LocationAwareLogger.log(Lorg/slf4j/Marker;Ljava/lang/String;ILjava/lang/String;[Ljava/lang/Object;Ljava/lang/Throwable;)V at org.apache.commons.logging.impl.SLF4JLocationAwareLog.info(SLF4JLocationAwareLog.java:159) at org.springframework.jca.context.SpringContextResourceAdapter.start(SpringContextResourceAdapter.java:151) ... Here're my logging dependencies (No commons-logging or log4j are being used): <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-core</artifactId> <version>0.9.28</version> <type>jar</type> <scope>runtime</scope> </dependency> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>0.9.28</version> <type>jar</type> <scope>runtime</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.6.1</version> <type>jar</type> <scope>runtime</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> <version>1.6.1</version> <type>jar</type> <scope>runtime</scope> </dependency> Any thoughts about what may be wrong? Thank you Luciano