Runtime.getRuntime().gc();
    protected void tearDown() throws Exception    {        super.tearDown();        Hashtable env = new Hashtable();        env.put( Context.PROVIDER_URL, "ou=system" );        env.put( Context.INITIAL_CONTEXT_FACTORY, "org.apache.ldap.server.jndi.CoreContextFactory" );        env.put( EnvKeys.SHUTDOWN, "" );        env.put( Context.SECURITY_PRINCIPAL, "uid=admin,ou=system" );        env.put( Context.SECURITY_CREDENTIALS, "secret" );        try { new InitialContext( env ); } catch( Exception e ) {}        sysRoot = null;    }