Mryange opened a new pull request, #67490:
URL: https://github.com/apache/doris/pull/67490
When FE local shuffle planning inserted a local exchange into a pipeline
whose parent pipeline was serial, it could increase only the downstream
pipeline task count while the paired sink and source operators remained
one-to-one. This produced inconsistent pipeline concurrency and could fail
during execution. Root cause: FE did not propagate the serial state of a parent
pipeline across pipeline boundaries. This change tracks that state and skips
local exchange insertion when the parent pipeline is serial, matching the
existing BE planning constraint.
### Release note
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [ ] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR should
merge into -->
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