code: public void clearCache()
    {
      // skip the clear on restart
      if (_lifecycle.isStopping()) {
        return;
      }
  
      if (log.isLoggable(Level.FINER)) {
        log.finest("clearCache");
      }
  
      // the invocation cache must be cleared first because the old
      // filter chain entries must not point to the cache's
      // soon-to-be-invalid entries
      getInvocationManager().clearCache();
  
      /*
      if (_httpCache != null) {
        _httpCache.clear();
      }
      */
    }
docs: Clears the proxy cache.