[branch-54] Resolve lost wakeup in SpillPoolReader with multiple conc…#23654
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…urrent SpillPoolWriters (minimal backport apache#23522)
alamb
approved these changes
Jul 16, 2026
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Which issue does this PR close?
54.1.0(minor/patch) Release #2254754.x branch backport of fix for #23447
Rationale for this change
See main PR #23522
What changes are included in this PR?
See main PR #23522
Are these changes tested?
Additional test cases added to verify existing behaviour
Fix manually tested with reproduction code from #23447
Are there any user-facing changes?
No