public void updateWorkerState(String nodeName, long workerId, WorkerState state) {
        executor.submit(new UpdateWorkerState(nodeName, workerId, state));
    }
Update the state of a particular agent's worker.

@param nodeName      The node where the agent is running.
@param workerId      The worker ID.
@param state         The worker state.
trogdor/src/main/java/org/apache/kafka/trogdor/coordinator/TaskManager.java