zhuzhurk commented on issue #11187: [FLINK-16234]Use LinkedHashSet for a deterministic iteration order URL: https://github.com/apache/flink/pull/11187#issuecomment-591225130 Thanks for reporting this issue and trying to fix it @cpugputpu . I second with @StephanEwen that we should fix the tests instead (`testSlotSharingOnAllVerticesInSameSlotSharingGroupByDefaultEnabled` and `testSlotSharingOnAllVerticesInSameSlotSharingGroupByDefaultDisabled`). We should not assume that the topological order of sources is the same as the order that they are added into the StreamGraph. To fix those problematic tests, one option is to find the wanted vertex via the name rather than via the index. @cpugputpu do you want to fix it?
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