return heartbeatInterval;
    }

    /**
     * Sets the heartbeat interval.
     *
     * @param heartbeatInterval the heartbeat interval in milliseconds
     */
    public void setHeartbeatInterval(long heartbeatInterval) {
        this.heartbeatInterval = heartbeatInterval;
    }

    /**
     * Validates that the heartbeat response is correct.

        nodeManager = new NodeManager(hosts, node -> request(new CurlRequest(Method.GET, node.getUrl("/"))));
        nodeManager.setHeartbeatInterval(fessConfig.getFesenHeartbeatInterval());
    }

    /**
     * Creates a GET request for the specified path.
     * @param path the request path
     * @return the configured CurlRequest
     */