maryannxue commented on issue #25308: [SPARK-28576][SQL] fix the dead lock issue when enable new adaptive execution URL: https://github.com/apache/spark/pull/25308#issuecomment-516906020 @JkSelf It looks like a bug related to `AdaptiveSparkPlanExec.onUpdatePlan` (which you can see from "subquery-0 thread:). Since a subquery should not call onUpdatePlan since the `executionID` is indeed for the main query only. Interestingly we've just found this wrong behavior and are going to push out a fix. I'll attach a patch shortly for you to verify.
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