/**
   * Cancel existing kickstart sessions on the host server for the system to be kickstarted (the
   * target server).
   */
  private void cancelExistingSessions() {
    Server hostServer = getHostServer();

    List sessions = KickstartFactory.lookupAllKickstartSessionsByServer(hostServer.getId());
    if (sessions != null) {
      log.debug("    Found sessions: " + sessions);
      Iterator i = sessions.iterator();
      while (i.hasNext()) {
        KickstartSession sess = (KickstartSession) i.next();
        if (sess != null && sess.getState() != null) {
          log.debug(
              "    Working with session: " + sess.getState().getLabel() + " id: " + sess.getId());
        }
        KickstartSessionState state = sess.getState();

        if (!state.equals(KickstartFactory.SESSION_STATE_FAILED)
            || !state.equals(KickstartFactory.SESSION_STATE_COMPLETE)) {
          log.debug(
              "    need to cancel this Session this.s: "
                  + hostServer.getId()
                  + " sess.hostServer: "
                  + (sess.getHostServer() == null ? "null" : "" + sess.getHostServer().getId()));
          if (sess.getHostServer() != null
              && sess.getHostServer().getId().equals(hostServer.getId())) {
            log.debug("    Marking session failed.");
            sess.markFailed(
                LocalizationService.getInstance().getMessage("kickstart.session.newsession"));
          }
        }
      }
    }
  }