} catch (final UnknownHostException e) {
            throw new FessSystemException("Failed to resolve the hostname: " + host, e);
        }
    }

    /**
     * Initializes the search engine client and configures indices.
     * Called automatically after dependency injection is complete.
     */
    @PostConstruct
    public void open() {
        if (logger.isDebugEnabled()) {

-weight:400}.mark,mark{padding:.2em;background-color:#fcf8e3}.list-unstyled{padding-left:0;list-style:none}.list-inline{padding-left:0;list-style:none}.list-inline-item{display:inline-block}.list-inline-item:not(:last-child){margin-right:.5rem}.initialism{font-size:90%;text-transform:uppercase}.blockquote{margin-bottom:1rem;font-size:1.25rem}.blockquote-footer{display:block;font-size:.875em;color:#6c757d}.blockquote-footer::before{content:"\2014\00A0"}.img-fluid{max-width:100%;height:auto}.img-t...