mridulm commented on code in PR #52336:
URL: https://github.com/apache/spark/pull/52336#discussion_r2605265078
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core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala:
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@@ -2022,8 +2053,26 @@ private[spark] class DAGScheduler(
// The epoch of the task is acceptable (i.e., the task was
launched after the most
// recent failure we're aware of for the executor), so mark
the task's output as
// available.
- mapOutputTracker.registerMapOutput(
+ val isChecksumMismatched = mapOutputTracker.registerMapOutput(
shuffleStage.shuffleDep.shuffleId, smt.partitionId, status)
+ if (isChecksumMismatched) {
+ shuffleStage.isChecksumMismatched = isChecksumMismatched
Review Comment:
On retry - when we throw away the entire mapper output and recompute it ->
at which point, we can go back to setting it to `false` ?
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