java.lang.NoSuchMethodError: org.slf4j.helpers.MessageFormatter.format(Ljava/lang/String;Ljava/lang/Object;)
Solution
The Reason for the above error is version mis-match between the various SLF4J API. (e.g. 1.6.x is not backwards compatible with 1.5.x). Make sure you have no duplicate jars in your classpath. If exists exclude them and add these dependencies to your classpath

pom.xml

<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.6.2</version>
</dependency>
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-log4j12</artifactId>
    <version>1.6.2</version>
</dependency>

In the above code the Version of API and Implementation should be same(i.e. 1.6.2)