igreenfield opened a new pull request #26624: [SPARK-8981][core] Add MDC support in Executor URL: https://github.com/apache/spark/pull/26624 ### What changes were proposed in this pull request? Added MDC support in all thread pulls TheardUtils create new pools that pass over MDC. ### Why are the changes needed? In many cases, it is very hard to understand from which actions the logs in the executor come from. when you are doing multi-thread work in the driver and send actions in parallel. ### Does this PR introduce any user-facing change? No ### How was this patch tested? No test added because no new functionality added it is thread pull change and all current tests pass.
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