1b93ea97ac
As of gh-22340, `MimeTypeUtils` has a built-in LRU cache implementation for caching parsed MIME types and avoiding excessive garbage creation at runtime. This implementation, when hit with highly concurrent reads on the same media type (the cache key), can create multiple keys for the same MIME type string. This duplication leads to the cache filling up and evicting entries. When the cache fetches a duplicate key, it is then not associated with a value and the cache can return a `null` value, which is forbidden by the API contract. This commit adds another cache check within the write lock: this avoids creating duplicate entries in the cache and `null` return values. Fixes gh-23211 |
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README.md
Spring Framework
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