void tryCreate() {
            try {
                client.createWorker(new CreateWorkerRequest(workerId, taskId, spec));
            } catch (Throwable e) {
                log.error("{}: error creating worker {}.", node.name(), this, e);
            }
        }
The normal amount of seconds between heartbeats sent to the agent.
trogdor/src/main/java/org/apache/kafka/trogdor/coordinator/NodeManager.java