Another unnamed CacheManager already exists in the same VM (ehCache 2.5)

Question

This is what happens when I run my junit tests...

Another CacheManager with same name \'cacheManager\' already exists in the same VM. Please 
provide unique          


        

Answer 1

For future readers, the cause of this problem in my case was that in my pom.xml file I had imported the hibernate-ehcache library, which unknown to me also already contained the ehcache library, and then explicitly imported the net.sf.ehache libray.

This seemed to work fine when I was running as a standalone app (a command line utility for example) but it caused the error in the original post when running on a tomcat server.

Changing my pom file from:

        
            org.hibernate
            hibernate-ehcache
            5.0.2.Final
        
        
            net.sf.ehcache
            ehcache
            2.7.4
        

To:

        
            org.hibernate
            hibernate-ehcache
            5.0.2.Final
        
        

Fixed the problem. If anyone has any idea why the problem only appeared when running in a tomcat container I'd be interested to know..