venkata91 opened a new pull request #33034:
URL: https://github.com/apache/spark/pull/33034
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### What changes were proposed in this pull request?
[[SPARK-23243](https://issues.apache.org/jira/browse/SPARK-23243)] and
[[SPARK-25341](https://issues.apache.org/jira/browse/SPARK-25341)] addressed
cases of stage retries for indeterminate stage involving operations like
repartition. This PR addresses the same issues in the context of push-based
shuffle. Currently there is no way to distinguish the current execution of a
stage for a shuffle ID. Therefore the changes explained below are necessary.
Core changes are summarized as follows:
1. Introduce a new variable `shuffleSequenceId` in `ShuffleDependency` which
is monotonically increasing value tracking the temporal ordering of execution
of <stage-id, stage-attempt-id> for a shuffle ID.
2. Correspondingly make changes in the push-based shuffle protocol layer in
`MergedShuffleFileManager`, `BlockStoreClient` passing the `shuffleSequenceId`
in order to keep track of the shuffle output in separate files on the shuffle
service side.
3. `DAGScheduler` increments the `shuffleSequenceId` tracked in
`ShuffleDependency` in the cases of a indeterministic stage execution
4. Deterministic stage will have `shuffleSequenceId` set to -1 as no special
handling is needed in this case.
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### Why are the changes needed?
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New protocol changes are needed due to the reasons explained above.
### Does this PR introduce _any_ user-facing change?
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No
### How was this patch tested?
Unit tests are WIP.
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