title: Eclipse stucks on Loading org.eclipse.jdt.debug.ui, how to fix it?
body: <p>today I restarted Eclipse 4.4 and I saw that it got stuck at Loading org.eclipse.jdt.debug.ui:</p>
  
  <p><img src="https://i.stack.imgur.com/vXtqT.png" alt="enter image description here"></p>
  
  <p>I tried to follow this thread on SO -> <a href="https://stackoverflow.com/questions/8972034/eclipse-hangs-on-loading-workbench">Eclipse hangs on loading workbench</a>, deleting the .lock, *.snap files inside the .metadata directory, but neither of the two has worked for me, I guess the problem is not concerned the issue the OP in the linked thread had, cause he had a problem with loading com.android.ide.eclipse.adt.</p>
  
  <p>Anyway, is there a possible solution I can apply?</p>
  
  <p>EDIT: this is the output of the eclipse -clean -refresh start (I use STS)</p>
  
  <pre><code>machine:~ user$ ./STS -clean -refresh
  org.eclipse.m2e.logback.configuration: The org.eclipse.m2e.logback.configuration bundle was activated before the state location was initialized.  Will retry after the state location is initialized.
  Starting Groovy-Eclipse compiler resolver.  Specified compiler level: unspecified
  113 2.3.7.xx-201411241807-e44 = STARTING
  114 2.2.2.xx-201411241807-e44 = STARTING
  115 2.1.8.xx-201411241807-e44 = STARTING
  116 2.0.7.xx-201411241807-e44 = STARTING
  org.eclipse.m2e.logback.configuration: Logback config file: /Users/antony/STS/workspace/.metadata/.plugins/org.eclipse.m2e.logback.configuration/logback.1.5.0.20140606-0033.xml
  org.eclipse.m2e.logback.configuration: Initializing logback
  </code></pre>