[fix][ml] Reset messageMetadataInitialized when recycling RangeCacheEntryWrapper - #25987
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lhotari merged 1 commit intoJun 10, 2026
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…ntryWrapper The flag was never cleared on recycle, so any wrapper that had served a cache hit kept messageMetadataInitialized=true for every entry it was later reused for. getValueInternal then skipped the lazy initializeMessageMetadataIfNeeded call, and cache hits returned entries with null metadata, forcing each dispatcher to re-parse the message metadata per entry per subscription.
void-ptr974
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Jun 10, 2026
dao-jun
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lhotari
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Jun 10, 2026
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Motivation
RangeCacheEntryWrapper.recycle()resets all wrapper fields exceptmessageMetadataInitialized. Once a wrapper has served a cache hit (which sets the flag ingetValueInternal), every entry later stored in that recycled wrapper instance inheritsmessageMetadataInitialized=true, sogetValueInternal()skips the lazyEntryImpl.initializeMessageMetadataIfNeeded()call.After recycler warm-up, cache hits return entries whose message metadata was never parsed, and each dispatcher falls back to
Commands.peekAndCopyMessageMetadata— a full metadata parse plus aMessageMetadatacopy per entry per subscription. This silently defeats the parse-once-per-cached-entry optimization, with the cost multiplied by subscription fan-out.Modifications
Reset
messageMetadataInitializedinrecycle(), matching the reset of the other wrapper fields.recycle()is the wrapper's only return-to-pool path, so this fully restores the intended lazy-init behavior.