It could be replaced by the ehcache dependency version 2.7.2 (same groupId : net.sf.ehcache).

However, in fact, the net.sf.ehcache.statistics.LiveCacheStatistics class used by the cas-server-integration-ehcache module does not exist any more in the version 2.7.2.
To avoid too much modification, I'll propose to downgrad to version 2.6.6.

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Misagh's message :

I do see the changed groupid here:
http://mvnrepository.com/artifact/net.sf.ehcache.internal/ehcache-core/2.7.2

Note the comment: "Internal ehcache-core module. This artifact is not meant to be used directly"

But then I also see:
http://mvnrepository.com/artifact/net.sf.ehcache/ehcache/2.7.2