public function pruneDeadWorkers() { $worker_pids = $this->workerPids(); return Resque::redis()->smembers('workers')->then(function ($response) use($worker_pids) { $promises = \React\Promise\map($response, function ($workerId) use($worker_pids) { list($hostname, $pid, $queues) = explode(':', $workerId, 3); if ($hostname != $this->hostname || in_array($pid, $worker_pids) || $pid == getmypid()) { return null; } $queues = explode(',', $queues); $worker = new self($queues, \Iwai\React\Resque::getEventLoop()); $worker->setId($workerId); return $worker->unregisterWorker(); }); return \React\Promise\all($promises); }); }