title: Oracle Debugging won't work SQL developer 4.2.0.17
body: <p>I have debugging privs and compiled my packages and package bodies for debug. When I try to launch the debugger, I get the following.  </p>
  
  <pre><code>Executing PL/SQL: ALTER SESSION SET PLSQL_DEBUG=TRUE
  Executing PL/SQL: CALL DBMS_DEBUG_JDWP.CONNECT_TCP( 'XX.XX.XX.XXX', 'YYYYY' )
  ORA-30683: failure establishing connection to debugger
  ORA-12535: TNS:operation timed out
  ORA-06512: at "SYS.DBMS_DEBUG_JDWP", line 68
  ORA-06512: at line 1
  Process exited.
  Disconnecting from the database ZZZ
  </code></pre>
  
  <p>I tried setting DatabaseDebuggerDisableJDWP=true in my ide.properites file (all of them), and it didn't help.  </p>