Spring bean creation failing due to java.lang.NoClassDefFoundError: net/sf/ehcache/Ehcache

Issue

• Trying to use the org.apache.cxf.rs.security.oauth2.provider.DefaultEHCacheOAuthDataProvider for our oauth implementation but its throwing an exception because it cant find the net/sf/ehcache/Ehcache definition in any of the installed bundles. Could you please point me to right direction on this, below is the exception

Caused by: java.lang.NoClassDefFoundError: net/sf/ehcache/Ehcache
    at java.lang.Class.getDeclaredConstructors0(Native Method)[:1.8.0_45]
    at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)[:1.8.0_45]
    at java.lang.Class.getConstructor0(Class.java:3075)[:1.8.0_45]
    at java.lang.Class.getDeclaredConstructor(Class.java:2178)[:1.8.0_45]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:78)[168:org.apache.servicemix.bundles.spring-beans:3.2.12.RELEASE_2]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1032)[168:org.apache.servicemix.bundles.spring-beans:3.2.12.RELEASE_2]
    ... 15 more
Caused by: java.lang.ClassNotFoundException: net.sf.ehcache.Ehcache not found by org.apache.cxf.cxf-rt-rs-security-oauth2 [266]
    at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1556)[org.apache.felix.framework-4.4.1.jar:]
    at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:77)[org.apache.felix.framework-4.4.1.jar:]
    at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1993)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[:1.8.0_45]