code: function disconnectTimeoutHandler(worker, cluster) {
      verbose('worker %d is stuck in disconnect', worker.process.pid);
  
      // if this is not a suicide we need to preserve that as worker.kill() will make this a suicide
      if (!worker.suicide) {
        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 is taking too long to disconnect
  
  @private
  @param worker
  @param cluster