title: Attach Source Issue in Eclipse
body: <p>In Eclipse (Ganymede) I'm debugging some code that uses Apache Commons HttpClient and would like to step into the HttpClient code. I've downloaded the source code and tried to attach it in the normal fashion (CTRL-click on the method name and use the Attach Source button). I've tried to attach both as external file and external folder with no success. I've attached source before with no issues and can currently step into Hibernate source code successfully.</p>
  
  <p>I've even tried editing the .classpath file directly to add sourcepath manually. Still no luck. Refreshing the project, doing a clean build, closing and re-opening Eclipse do not solve the issue. Frustratingly, Eclipse provides no error message; it just does not attach the source.</p>
  
  <p>Here are the entries in .claspath:</p>
  
  <pre><code>&lt;!-- Hibernate. Works --&gt;
  &lt;classpathentry kind="lib" path="/myEAP/EarContent/APP-INF/lib/hibernate.jar" sourcepath="D:/Data/Download/hibernate-3.2.2.ga/hibernate-3.2/src"/&gt;
  
  &lt;!-- Commons HttpClient. Will not attach --&gt;
  &lt;classpathentry kind="lib" path="/myEAP/EarContent/APP-INF/lib/commons-httpclient.jar" sourcepath="D:/Data/Download/commons-httpclient-3.1/src/java"/&gt;
  </code></pre>
  
  <p>I've tried changing the path to D:/Data/Download/commons-httpclient-3.1/src and that does not work either.</p>
  
  <p>The directory structure is:</p>
  
  <pre><code>D
    Data
      Download
        commons-httpclient-3.1
          src
            java
              org
                apache
                  commons
                    httpclient
                      AutoCloseInputStream.java
                      ... (and so forth)
  </code></pre>