title: What causes FileNotFoundException: ...pdq.jar with db2jcc4?
body: <p>When adding db2jcc4.jar to the system class path, Tomcat 8.0 raises a FileNotFoundException on a jar file that has no apparent reference to my project, pdq.jar.  </p>
  
  <p>I couldn't find it anywhere on my system or where it might come from, except through a search which turned up the answer below.</p>
  
  <p>In this case, I have my CATALINA_HOME pointed to C:\tomcat8.0\apache-tomcat-8.0.41 and my project has the following maven dependency defined:</p>
  
  <pre><code>&lt;dependency&gt;
          &lt;groupId&gt;com.ibm.db2.jcc&lt;/groupId&gt;
          &lt;artifactId&gt;db2jcc4&lt;/artifactId&gt;
          &lt;version&gt;10.1&lt;/version&gt;
          &lt;scope&gt;system&lt;/scope&gt;
          &lt;systemPath&gt;${env.CATALINA_HOME}/lib/db2jcc4-10.1.jar&lt;/systemPath&gt;
  &lt;/dependency&gt;
  </code></pre>