I don't think current eviction policy can do what you want. Best bet is to customize the LRUPolicy yourself to achieve this requirement. E.g., when an item is older than 200 seconds, do remove instead of evict.
Thanks for the confirmation. That's what I suspected anyhow.
From a complete newcomer perspective, it does seem like a reasonable feature to have in there though.
I'll have to say this requirement is unusal though. However, please feel free to open a Jira such that people can vote on it.