var dns = require('dns'); var retry = require('../lib/retry'); function faultTolerantResolve(address, cb) { var opts = { retries: 2, factor: 2, minTimeout: 1 * 1000, maxTimeout: 2 * 1000, randomize: true }; var operation = retry.operation(opts); operation.attempt(function(currentAttempt) { dns.resolve(address, function(err, addresses) { if (operation.retry(err)) { return; } cb(operation.mainError(), operation.errors(), addresses); }); }); } faultTolerantResolve('nodejs.org', function(err, errors, addresses) { console.warn('err:'); console.log(err); console.warn('addresses:'); console.log(addresses); });