我怎样才能使风暴发送元组顺序？

Question

当我编写风暴拓扑时，我发现元组的顺序并不总是与喷口发出的顺序相同。（喷口的功能是在线读取文件并将线发送到螺栓< strong>没有 Thread.sleep()，所以这个程序会非常快。）

有谁能告诉我如何确保喷嘴或螺栓发出的元组顺序？非常感谢！

Answer 1

您可能需要查看Trident topology

Trident solves this problem by doing two things:

    Each batch is given a unique id called the "transaction id". If a batch is retried it will have the exact same transaction id.
    State updates are ordered among batches. That is, the state updates for batch 3 won't be applied until the state updates for batch 2 have succeeded.