code: function forkTimeoutHandler(worker, cluster) {
      verbose('worker %d is stuck in fork', worker.process.pid);
  
      if (!cluster.workers[worker.id]) {
        return;
      }
  
      // something is wrong with this worker.  Kill it!
      master.suicideOverrides[worker.id] = worker.id;
  
      master.isRunning(worker, function(running) {
        if (!running) {
          return;
        }
  
        try {
          debug('sending SIGKILL to worker %d', worker.process.pid);
          process.kill(worker.process.pid, 'SIGKILL');
        } catch (e) {
          // this can happen.  don't crash!!
        }
      });
    }
docs: Called when worker takes too long to fork
  
  @private
  @param worker
  @param cluster