title: Error while integrating slf4j over log4j
body: <p>I am integrating sl4j over log4j for logging in my spring application, but while starting my tomcat , I am getting an error as :</p>
  
  <pre><code>SLF4J: Class path contains multiple SLF4J bindings.
  SLF4J: Found binding in [jar:file:/E:/apache-tomcat-8/apache-tomcat-8.0.3/webapp
  s/ROOT/WEB-INF/lib/slf4j-jdk14-1.5.6.jar!/org/slf4j/impl/StaticLoggerBinder.class]
  SLF4J: Found binding in [jar:file:/E:/apache-tomcat-8/apache-tomcat-8.0.3/webapps/ROOT/WEB-INF/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
  SLF4J: Found binding in [jar:file:/E:/apache-tomcat-8/apache-tomcat-8.0.3/webapps/ROOT/WEB-INF/lib/slf4j-nop-1.5.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
  SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
  SLF4J: Actual binding is of type [org.slf4j.impl.JDK14LoggerFactory]
  SLF4J: The requested version 1.5.6 by your slf4j binding is not compatible with[1.6, 1.7]
  SLF4J: See http://www.slf4j.org/codes.html#version_mismatch for further details.
  </code></pre>
  
  <p>Dependencies in my pom.xml is:</p>
  
  <pre><code>&lt;dependencies&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;junit&lt;/groupId&gt;
              &lt;artifactId&gt;junit&lt;/artifactId&gt;
              &lt;version&gt;4.7&lt;/version&gt;
              &lt;scope&gt;test&lt;/scope&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.mockito&lt;/groupId&gt;
              &lt;artifactId&gt;mockito-all&lt;/artifactId&gt;
              &lt;version&gt;1.9.5&lt;/version&gt;
              &lt;scope&gt;test&lt;/scope&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;commons-lang&lt;/groupId&gt;
              &lt;artifactId&gt;commons-lang&lt;/artifactId&gt;
              &lt;version&gt;2.6&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.apache.commons&lt;/groupId&gt;
              &lt;artifactId&gt;commons-lang3&lt;/artifactId&gt;
              &lt;version&gt;3.1&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;net.sf.ehcache&lt;/groupId&gt;
              &lt;artifactId&gt;ehcache-core&lt;/artifactId&gt;
              &lt;version&gt;2.5.2&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;org.apache.httpcomponents&lt;/groupId&gt;
              &lt;artifactId&gt;httpclient&lt;/artifactId&gt;
              &lt;version&gt;4.3.2&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;commons-httpclient&lt;/groupId&gt;
              &lt;artifactId&gt;commons-httpclient&lt;/artifactId&gt;
              &lt;version&gt;3.1&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;joda-time&lt;/groupId&gt;
              &lt;artifactId&gt;joda-time&lt;/artifactId&gt;
              &lt;version&gt;2.1&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;cglib&lt;/groupId&gt;
              &lt;artifactId&gt;cglib&lt;/artifactId&gt;
              &lt;version&gt;2.2.2&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;com.sun.xml.bind&lt;/groupId&gt;
              &lt;artifactId&gt;jaxb-impl&lt;/artifactId&gt;
              &lt;version&gt;2.2.7&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.jvnet.jaxb2_commons&lt;/groupId&gt;
              &lt;artifactId&gt;jaxb2-basics-runtime&lt;/artifactId&gt;
              &lt;version&gt;0.6.0&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;net.sf.opencsv&lt;/groupId&gt;
              &lt;artifactId&gt;opencsv&lt;/artifactId&gt;
              &lt;version&gt;2.3&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.apache.poi&lt;/groupId&gt;
              &lt;artifactId&gt;poi-ooxml&lt;/artifactId&gt;
              &lt;version&gt;3.9&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.apache.axis&lt;/groupId&gt;
              &lt;artifactId&gt;axis&lt;/artifactId&gt;
              &lt;version&gt;1.4&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;javax.xml&lt;/groupId&gt;
              &lt;artifactId&gt;jaxrpc&lt;/artifactId&gt;
              &lt;version&gt;1.1&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.apache.axis2&lt;/groupId&gt;
              &lt;artifactId&gt;axis2&lt;/artifactId&gt;
              &lt;version&gt;1.6.2&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;commons-discovery&lt;/groupId&gt;
              &lt;artifactId&gt;commons-discovery&lt;/artifactId&gt;
              &lt;version&gt;0.2&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;net.sf.json-lib&lt;/groupId&gt;
              &lt;artifactId&gt;json-lib&lt;/artifactId&gt;
              &lt;version&gt;2.4&lt;/version&gt;
              &lt;classifier&gt;jdk15&lt;/classifier&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;javax.validation&lt;/groupId&gt;
              &lt;artifactId&gt;validation-api&lt;/artifactId&gt;
              &lt;version&gt;1.0.0.GA&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;javax.annotation&lt;/groupId&gt;
              &lt;artifactId&gt;jsr250-api&lt;/artifactId&gt;
              &lt;version&gt;1.0&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;commons-fileupload&lt;/groupId&gt;
              &lt;artifactId&gt;commons-fileupload&lt;/artifactId&gt;
              &lt;version&gt;1.2.2&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;commons-io&lt;/groupId&gt;
              &lt;artifactId&gt;commons-io&lt;/artifactId&gt;
              &lt;version&gt;1.3.2&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.apache.httpcomponents&lt;/groupId&gt;
              &lt;artifactId&gt;httpmime&lt;/artifactId&gt;
              &lt;version&gt;4.2.5&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;javax.mail&lt;/groupId&gt;
              &lt;artifactId&gt;mail&lt;/artifactId&gt;
              &lt;version&gt;1.4&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.quartz-scheduler&lt;/groupId&gt;
              &lt;artifactId&gt;quartz&lt;/artifactId&gt;
              &lt;version&gt;1.8.6&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;commons-net&lt;/groupId&gt;
              &lt;artifactId&gt;commons-net&lt;/artifactId&gt;
              &lt;version&gt;3.3&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;com.servletsuite&lt;/groupId&gt;
              &lt;artifactId&gt;random&lt;/artifactId&gt;
              &lt;version&gt;1.7&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;javax.servlet&lt;/groupId&gt;
              &lt;artifactId&gt;servlet-api&lt;/artifactId&gt;
              &lt;version&gt;2.5&lt;/version&gt;
              &lt;scope&gt;provided&lt;/scope&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;javax.servlet&lt;/groupId&gt;
              &lt;artifactId&gt;javax.servlet-api&lt;/artifactId&gt;
              &lt;version&gt;3.0.1&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;javax.servlet.jsp&lt;/groupId&gt;
              &lt;artifactId&gt;jsp-api&lt;/artifactId&gt;
              &lt;version&gt;2.1&lt;/version&gt;
              &lt;scope&gt;provided&lt;/scope&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;javax.servlet&lt;/groupId&gt;
              &lt;artifactId&gt;jstl&lt;/artifactId&gt;
              &lt;version&gt;1.2&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.apache.tiles&lt;/groupId&gt;
              &lt;artifactId&gt;tiles-extras&lt;/artifactId&gt;
              &lt;version&gt;${tiles-version}&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;commons-logging&lt;/groupId&gt;
              &lt;artifactId&gt;commons-logging&lt;/artifactId&gt;
              &lt;version&gt;1.1.1&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;!-- Spring starts here --&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework&lt;/groupId&gt;
              &lt;artifactId&gt;spring-beans&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.version}&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework&lt;/groupId&gt;
              &lt;artifactId&gt;spring-web&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.version}&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework&lt;/groupId&gt;
              &lt;artifactId&gt;spring-webmvc&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.version}&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework&lt;/groupId&gt;
              &lt;artifactId&gt;spring-jdbc&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.version}&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework&lt;/groupId&gt;
              &lt;artifactId&gt;spring-orm&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.version}&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework&lt;/groupId&gt;
              &lt;artifactId&gt;spring-core&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.version}&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework&lt;/groupId&gt;
              &lt;artifactId&gt;spring-oxm&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.version}&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework&lt;/groupId&gt;
              &lt;artifactId&gt;spring-tx&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.version}&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework&lt;/groupId&gt;
              &lt;artifactId&gt;spring-test&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.version}&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework&lt;/groupId&gt;
              &lt;artifactId&gt;spring-context-support&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.version}&lt;/version&gt;
          &lt;/dependency&gt;
  
  
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework&lt;/groupId&gt;
              &lt;artifactId&gt;spring-context&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.version}&lt;/version&gt;
              &lt;exclusions&gt;
                  &lt;exclusion&gt;
                      &lt;groupId&gt;commons-logging&lt;/groupId&gt;
                      &lt;artifactId&gt;commons-logging&lt;/artifactId&gt;
                  &lt;/exclusion&gt;
              &lt;/exclusions&gt;
          &lt;/dependency&gt;
  
          &lt;!--Spring Security --&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.security&lt;/groupId&gt;
              &lt;artifactId&gt;spring-security-core&lt;/artifactId&gt;
              &lt;version&gt;${org.springsecurity-version}&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.security&lt;/groupId&gt;
              &lt;artifactId&gt;spring-security-config&lt;/artifactId&gt;
              &lt;version&gt;${org.springsecurity-version}&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.security&lt;/groupId&gt;
              &lt;artifactId&gt;spring-security-taglibs&lt;/artifactId&gt;
              &lt;!-- &lt;version&gt;3.2.0.RELEASE&lt;/version&gt; --&gt;
              &lt;version&gt;${org.springsecurity-version}&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.security&lt;/groupId&gt;
              &lt;artifactId&gt;spring-security-web&lt;/artifactId&gt;
              &lt;version&gt;${org.springsecurity-version}&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;mysql&lt;/groupId&gt;
              &lt;artifactId&gt;mysql-connector-java&lt;/artifactId&gt;
              &lt;version&gt;5.1.6&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;org.hibernate.javax.persistence&lt;/groupId&gt;
              &lt;artifactId&gt;hibernate-jpa-2.0-api&lt;/artifactId&gt;
              &lt;version&gt;1.0.1.Final&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;net.sf.ehcache&lt;/groupId&gt;
              &lt;artifactId&gt;ehcache&lt;/artifactId&gt;
              &lt;version&gt;2.7.2&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;commons-collections&lt;/groupId&gt;
              &lt;artifactId&gt;commons-collections&lt;/artifactId&gt;
              &lt;version&gt;3.2.1&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;commons-validator&lt;/groupId&gt;
              &lt;artifactId&gt;commons-validator&lt;/artifactId&gt;
              &lt;version&gt;1.4.0&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
              &lt;artifactId&gt;maven-war-plugin&lt;/artifactId&gt;
              &lt;version&gt;2.5&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;org.apache.poi&lt;/groupId&gt;
              &lt;artifactId&gt;poi&lt;/artifactId&gt;
              &lt;version&gt;3.9&lt;/version&gt;
          &lt;/dependency&gt;
  
  
          &lt;!-- AspectJ --&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.aspectj&lt;/groupId&gt;
              &lt;artifactId&gt;aspectjrt&lt;/artifactId&gt;
              &lt;version&gt;${org.aspectj-version}&lt;/version&gt;
          &lt;/dependency&gt; 
  
          &lt;!-- Logging --&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.slf4j&lt;/groupId&gt;
              &lt;artifactId&gt;slf4j-api&lt;/artifactId&gt;
              &lt;version&gt;${org.slf4j-version}&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.slf4j&lt;/groupId&gt;
              &lt;artifactId&gt;slf4j-log4j12&lt;/artifactId&gt;
              &lt;version&gt;${org.slf4j-version}&lt;/version&gt;
              &lt;scope&gt;runtime&lt;/scope&gt;
              &lt;exclusions&gt;
                  &lt;exclusion&gt;
                      &lt;groupId&gt;log4j&lt;/groupId&gt;
                      &lt;artifactId&gt;log4j&lt;/artifactId&gt;
                  &lt;/exclusion&gt;
              &lt;/exclusions&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;org.apache.logging.log4j&lt;/groupId&gt;
              &lt;artifactId&gt;log4j-1.2-api&lt;/artifactId&gt;
              &lt;version&gt;2.0.2&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;!-- @Inject --&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;javax.inject&lt;/groupId&gt;
              &lt;artifactId&gt;javax.inject&lt;/artifactId&gt;
              &lt;version&gt;1&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;!--  Hibernate  --&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.hibernate&lt;/groupId&gt;
              &lt;artifactId&gt;hibernate-validator&lt;/artifactId&gt;
              &lt;version&gt;4.2.0.Final&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.hibernate.common&lt;/groupId&gt;
              &lt;artifactId&gt;hibernate-commons-annotations&lt;/artifactId&gt;
              &lt;version&gt;4.0.1.Final&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.hibernate&lt;/groupId&gt;
              &lt;artifactId&gt;hibernate-core&lt;/artifactId&gt;
              &lt;version&gt;${hibernate.version}&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.hibernate.javax.persistence&lt;/groupId&gt;
              &lt;artifactId&gt;hibernate-jpa-2.0-api&lt;/artifactId&gt;
              &lt;version&gt;1.0.1.Final&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.hibernate&lt;/groupId&gt;
              &lt;artifactId&gt;hibernate-entitymanager&lt;/artifactId&gt;
              &lt;version&gt;${hibernate.version}&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;org.hibernate&lt;/groupId&gt;
              &lt;artifactId&gt;hibernate-ehcache&lt;/artifactId&gt;
              &lt;version&gt;${hibernate.version}&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;!-- Spring Social --&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.social&lt;/groupId&gt;
              &lt;artifactId&gt;spring-social-config&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.social.version}&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.social&lt;/groupId&gt;
              &lt;artifactId&gt;spring-social-core&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.social.version}&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.social&lt;/groupId&gt;
              &lt;artifactId&gt;spring-social-security&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.social.version}&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.social&lt;/groupId&gt;
              &lt;artifactId&gt;spring-social-web&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.social.version}&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;!-- Spring Social Facebook --&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.social&lt;/groupId&gt;
              &lt;artifactId&gt;spring-social-facebook&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.social.version}&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;!-- Spring Social Twitter --&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.social&lt;/groupId&gt;
              &lt;artifactId&gt;spring-social-twitter&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.social.version}&lt;/version&gt;
          &lt;/dependency&gt;
  
          &lt;!-- Spring Social google --&gt;
          &lt;!-- &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.social&lt;/groupId&gt;
              &lt;artifactId&gt;spring-social-google&lt;/artifactId&gt;
              &lt;version&gt;${org.springframework.social.version}&lt;/version&gt;
          &lt;/dependency&gt; --&gt;
  
          &lt;!-- Spring Data JPA --&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework&lt;/groupId&gt;
              &lt;artifactId&gt;spring-jpa&lt;/artifactId&gt;
              &lt;version&gt;2.0.8&lt;/version&gt;
          &lt;/dependency&gt;
  
      &lt;/dependencies&gt;
  </code></pre>
  
  <p>It is clear that there are some mismatch of class file version as some other dependency may using log4j of some other version which I need to exclude in my pom, but unable to figure the appropriate one, please help.</p>