Prevent cache pollution by storing only the factories #34732
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Update `SpringFactoriesLoader` so that the cache stores only the factories and not the complete loader. Prior to this commit, if a cache entry was added with the thread conect classloader, the loader instance would a added and the classloader stored. If the thread context classloader subsequently changes, and a call is made to `forDefaultResourceLocation` with `null` for the classloader, the cached entry would be used which contains the older classloader. Fixes spring-projectsgh-34732
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Update `SpringApplication` to work around `SpringFactoriesLoader` cache pollution by loading factories using a `null` class loader. See spring-projects/spring-framework#34732 for details.
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Update
SpringFactoriesLoaderso that the cache stores only the factories and not the complete loader.Prior to this commit, if a cache entry was added with the thread conect classloader, the loader instance would a added and the classloader stored. If the thread context classloader subsequently changes, and a call is made to
forDefaultResourceLocationwithnullfor the classloader, the cached entry would be used which contains the older classloader.