Server : nginx/1.20.1 System : Linux ccpf-production-2021 5.4.0-148-generic #165-Ubuntu SMP Tue Apr 18 08:53:12 UTC 2023 x86_64 User : forge ( 1000) PHP Version : 7.4.21 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, Directory :  /lib/node_modules/npm/node_modules/retry/example/

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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);
});