cloud-fan 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-517269420 > And PR#25316 fix the dead lock issue by disabling updating the subquery ui. I don't think you understand that fix. The main query has an execution id, while the subqueries inside the main query do not have. When executing a subquery, it's wrong to update the UI with the subquery's query plan, because that UI should show the query plan of the main query.
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