title: maven compilation - error log4j
body: <p>i'm building java application and suddenly i found problem with compilation:</p>
  
  <pre><code>[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile) on project sonda: Compilation failure: Compilation failure:
  [ERROR] ..../service/UserService.java:[7,23] package org.apache.log4j does not exist
  </code></pre>
  
  <p>But i was building this application before and everything was ok. Additionally, when i run this application under Eclipse using tomcat, it's running well.</p>
  
  <p>In pom i have:</p>
  
  <pre><code>&lt;dependency&gt;
          &lt;groupId&gt;org.slf4j&lt;/groupId&gt;
          &lt;artifactId&gt;slf4j-api&lt;/artifactId&gt;
          &lt;version&gt;${org.slf4j-version}&lt;/version&gt;
      &lt;/dependency&gt;
      &lt;dependency&gt;
          &lt;groupId&gt;org.slf4j&lt;/groupId&gt;
          &lt;artifactId&gt;jcl-over-slf4j&lt;/artifactId&gt;
          &lt;version&gt;${org.slf4j-version}&lt;/version&gt;
          &lt;scope&gt;runtime&lt;/scope&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;/dependency&gt;
      &lt;dependency&gt;
          &lt;groupId&gt;log4j&lt;/groupId&gt;
          &lt;artifactId&gt;log4j&lt;/artifactId&gt;
          &lt;version&gt;1.2.15&lt;/version&gt;
          &lt;exclusions&gt;
              &lt;exclusion&gt;
                  &lt;groupId&gt;javax.mail&lt;/groupId&gt;
                  &lt;artifactId&gt;mail&lt;/artifactId&gt;
              &lt;/exclusion&gt;
              &lt;exclusion&gt;
                  &lt;groupId&gt;javax.jms&lt;/groupId&gt;
                  &lt;artifactId&gt;jms&lt;/artifactId&gt;
              &lt;/exclusion&gt;
              &lt;exclusion&gt;
                  &lt;groupId&gt;com.sun.jdmk&lt;/groupId&gt;
                  &lt;artifactId&gt;jmxtools&lt;/artifactId&gt;
              &lt;/exclusion&gt;
              &lt;exclusion&gt;
                  &lt;groupId&gt;com.sun.jmx&lt;/groupId&gt;
                  &lt;artifactId&gt;jmxri&lt;/artifactId&gt;
              &lt;/exclusion&gt;
          &lt;/exclusions&gt;
          &lt;scope&gt;runtime&lt;/scope&gt;
      &lt;/dependency&gt;
  </code></pre>
  
  <p>Can you help me ?</p>