CacheFilter: Ensure that cache key hash function is long-term stable
Open
area/cache
help wanted
- Dominant language
- C++
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Description
CacheFilter uses MessageUtil::hash to compute key hashes, but it isn't clear whether MessageUtil::hash is guaranteed stable across releases, operating systems, etc. This stability is needed for persistent caches, to avoid cache flushes.
Not a blocker for most deployments.
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