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fix(storage): preserve flush state across concurrent flushes in async writers - #16274
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This pull request modifies the SetFlushed method in both AsyncWriterConnectionBufferedState and AsyncWriterConnectionResumedState to only reset the flush_ flag to false when there are no remaining pending flush promises. The unit tests have been updated to align with this change, expecting a second flush and query sequence. I have no feedback to provide as there are no review comments.
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #16274 +/- ##
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Coverage 92.29% 92.29%
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Files 2221 2221
Lines 207372 207384 +12
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+ Hits 191386 191399 +13
+ Misses 15986 15985 -1 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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In
SetFlushed(), bothAsyncWriterConnectionBufferedStateandAsyncWriterConnectionResumedStatewere unconditionally resetting the internal state flagflush_ = falseat the very start of the method when a flush succeeded. If a caller issued multiple concurrentFlush()requests (or queued a new Flush() while a previous Flush() was in-flight), resettingflush_ = falseprematurely caused the backgroundWriteLoopto treat any remaining queued data as buffered data rather than explicit flush requests.This PR modifies
SetFlushed()to defer resettingflush_ = falseuntilpending_flush_promises_.empty()evaluates to true (or when handling empty promise edge cases). This guarantees that as long as there are pending flush promises in the queue,flush_remains true, instructing theWriteLoopto continue invoking flush operations on subsequent chunks until all queued flush promises are satisfied.