eswait.js

function connectionStatusReceived(status) {
    if(status !== true) {
        console.log("Ping got error", error);
        setTimeout(function() {
            esClient.ping().then(connectionStatusReceived,
                                 connectionStatusReceived);
        }, 3000);
    }
    else {
        console.log("Ping got success");
    }
};

esClient.ping().then(connectionStatusReceived,
                     connectionStatusReceived);