You should shut down a CacheManager after use. It does have a shut-down hook, but it is a best practice to shut it down in your code.

The following shuts down the singleton CacheManager:

The following shuts down a CacheManager instance, assuming you have a reference to the CacheManager called manager:

For additional examples, see CacheManagerTest at http://ehcache.org/xref-test/net/sf/ehcache/CacheManagerTest.html.