Incorrect Version of ehcache

Within a web application I'm currently working on, I've just added the Hibernate entity mappings into the hibernate.cfg.xml file. These look something like:

<mapping class="project.entity.MyClass" />

and follow a cache configuration line that says:

<property name="cache.use_second_level_cache">true</property>
<property name="hibernate.cache.provider_class">
net.sf.ehcache.hibernate.SingletonEhCacheProvider
</property>

However, when I launch Tomcat, I get the following errors:


org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/bean-defs-6-session.xml]: Invocation of init method failed; nested exception is java.lang.NoSuchMethodError: net.sf.ehcache.CacheManager.getEhcache(Ljava/lang/String;)Lnet/sf/ehcache/Ehcache;
Caused by:
java.lang.NoSuchMethodError: net.sf.ehcache.CacheManager.getEhcache(Ljava/lang/String;)Lnet/sf/ehcache/Ehcache;
at net.sf.ehcache.hibernate.SingletonEhCacheProvider.buildCache(SingletonEhCacheProvider.java:89)
at ...

It turns out that the application is using an old version of ehcache.jar. Further investigation revealed that the reason for this is that the MyEclipse "Hibernate 3.1 Core Libraries" includes a copy of "ehcache-1.1.jar". Even though I had "ehcache-1.3.0.jar" included as a project library (and even changed its order above the Hibernate Core Libraries in the "Order and Export" tab), the application was still defaulting to the ehcache-1.1.jar version.

To fix this, I removed the Hibernate 3.1 Core Libraries from the project libraries. (Subsequently you can add it back in, if you want, as it will now be below the ehcache-1.3.0.jar so the correct version of ehcache will now be used, if you need other bits from the Hibernate 3.1 Core libraries).