Transformed Blob Cache Requires Writeable Base Directory

The bean transformedBlobCache of type com.coremedia.transform.impl.TransformedBlobCache now validates the configured base path (configuration option com.coremedia.transform.blobCache.basePath) and throws an exception if it finds that the base path is not a writeable directory in which it can cache and rotate temporary files holding the transformed blob data.

(CMS-24132)