This error is not related to Runtime and is not a functional issue.
By default, Java runtime uses LRUMemoryCache class provided by JCS to cache licenses. LRUMemoryCache provides useful implementation to process least recently used objects from its cache.
The error message is more concerned for Disk Caching and since LRU cache is used internally, this error doesn’t really belong to Cloud Runtime.
As a workaround, following properties can be added to cache.ccf file in order to bypass this fake error: