igreenfield commented on a change in pull request #26624:
URL: https://github.com/apache/spark/pull/26624#discussion_r422903805
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File path: core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
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@@ -130,7 +224,15 @@ private[spark] object ThreadUtils {
*/
def newDaemonCachedThreadPool(prefix: String): ThreadPoolExecutor = {
Review comment:
My code just set the MDC and the only way to pass MDC between
ThreadPools is the code I add to the ThreadUtils.
the executor creates threads pool, so in order that all logs of the executor
will have the MDC populated you need that change.
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