// First initialization
        if (client.isInit.compareAndSet(false, true)) {
            client.init();
        }
        assertTrue("Client should be initialized", client.isInit.get());

        // Second initialization attempt should be no-op
        boolean secondInit = client.isInit.compareAndSet(false, true);
        assertFalse("Second initialization should not occur", secondInit);

     * @return the response data
     * @throws CrawlingAccessException if the request fails
     */
    protected ResponseData processRequest(final String uri, final boolean includeContent) {
        if (isInit.compareAndSet(false, true)) {
            init();
        }

        // start
        AccessTimeoutTarget accessTimeoutTarget = null;
        TimeoutTask accessTimeoutTask = null;
        if (accessTimeout != null) {

                if (logger.isDebugEnabled()) {
                    logger.debug("Process {} is not alive.", p);
                }
                return;
            }

            if (executed.compareAndSet(false, true)) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Interrupting a stream thread.");
                }
                ist.interrupt();