Your current environment

N/A

🐛 Describe the bug

from dataclasses import dataclass
import uuid

@dataclass
class Foo:
    id: str = str(uuid.uuid4())

if __name__ == "__main__":
    for _ in range(2):
        foo = Foo()
        print(foo.id)

    for _ in range(2):
        print(str(uuid.uuid4()))

or b5880c9

We decorate KVTransferConfig with dataclass and provide engine_id: str(uuid.uuid4()), this means if we create the config multiple times, the engine_id is actually identical. See above reproduction script.

This could be pitfall if people generate the config in a central place and launch multiple servers, like ray-project/ray#53092

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