title: java.lang.NoClassDefFoundError: Could not initialize class net.sf.cglib.proxy.Enhancer
body: <p>when i am trying to request to Rest service at time of response it getting exception..</p>
  
  <pre><code>Feb 21, 2013 2:34:49 PM com.sun.jersey.spi.container.ContainerResponse mapMappableContainerException
  SEVERE: The exception contained within MappableContainerException could not be mapped to a response, re-throwing to the HTTP container
  java.lang.NoClassDefFoundError: Could not initialize class net.sf.cglib.proxy.Enhancer
      at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:117)
      at org.hibernate.proxy.pojo.cglib.CGLIBProxyFactory.postInstantiate(CGLIBProxyFactory.java:43)
      at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:162)
      at org.hibernate.tuple.entity.AbstractEntityTuplizer.&lt;init&gt;(AbstractEntityTuplizer.java:135)
      at org.hibernate.tuple.entity.PojoEntityTuplizer.&lt;init&gt;(PojoEntityTuplizer.java:55)
      at org.hibernate.tuple.entity.EntityEntityModeToTuplizerMapping.&lt;init&gt;(EntityEntityModeToTuplizerMapping.java:56)
      at org.hibernate.tuple.entity.EntityMetamodel.&lt;init&gt;(EntityMetamodel.java:302)
      at org.hibernate.persister.entity.AbstractEntityPersister.&lt;init&gt;(AbstractEntityPersister.java:434)
      at org.hibernate.persister.entity.SingleTableEntityPersister.&lt;init&gt;(SingleTableEntityPersister.java:109)
      at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55)
      at org.hibernate.impl.SessionFactoryImpl.&lt;init&gt;(SessionFactoryImpl.java:226)
      at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1300)
      at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:713)
      at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:121)
      at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:52)
      at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:34)
      at de.vogella.jpa.simple.main.Main.getObj(Main.java:18)
      at com.poshs.webapp.MyResource.setIt(MyResource.java:43)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:597)
  </code></pre>
  
  <p>this result i get after run mvn dependency:tree</p>
  
  <pre><code>[INFO] +- com.sun.jersey:jersey-server:jar:1.8:compile 
  [INFO] |  +- asm:asm:jar:3.1:compile
  [INFO] |  \- com.sun.jersey:jersey-core:jar:1.8:compile
  [INFO] +- com.sun.jersey:jersey-json:jar:1.8:compile
  [INFO] |  +- org.codehaus.jettison:jettison:jar:1.1:compile
  [INFO] |  |  \- stax:stax-api:jar:1.0.1:compile
  [INFO] |  +- com.sun.xml.bind:jaxb-impl:jar:2.2.3-1:compile
  [INFO] |  |  \- javax.xml.bind:jaxb-api:jar:2.2.2:compile
  [INFO] |  |     +- javax.xml.stream:stax-api:jar:1.0-2:compile
  [INFO] |  |     \- javax.activation:activation:jar:1.1:compile
  [INFO] |  +- org.codehaus.jackson:jackson-core-asl:jar:1.7.1:compile
  [INFO] |  +- org.codehaus.jackson:jackson-mapper-asl:jar:1.7.1:compile
  [INFO] |  +- org.codehaus.jackson:jackson-jaxrs:jar:1.7.1:compile
  [INFO] |  \- org.codehaus.jackson:jackson-xc:jar:1.7.1:compile
  [INFO] +- junit:junit:jar:4.8.2:test
  [INFO] +- com.sun.jersey:jersey-client:jar:1.8:test
  [INFO] +- org.glassfish.distributions:web-all:jar:10.0-build-20080430:test
  [INFO] +- org.glassfish.embedded:gf-embedded-api:jar:1.0-alpha-4:test
  [INFO] |  +- org.glassfish.api:dtds:jar:resources:9.0.2:test
  [INFO] |  \- org.glassfish.api:schemas:jar:resources:9.0.2:test
  [INFO] +- org.apache.httpcomponents:httpclient:jar:4.0-alpha4:compile
  [INFO] |  +- org.apache.httpcomponents:httpcore:jar:4.0-beta1:compile
  [INFO] |  \- commons-codec:commons-codec:jar:1.3:compile
  [INFO] +- com.google.code.gson:gson:jar:2.2.2:compile
  [INFO] +- org.apache.openejb:commons-dbcp-all:jar:1.3-r699049:compile
  [INFO] +- org.apache.directory.studio:org.apache.commons.pool:jar:1.6:compile
  [INFO] |  \- commons-pool:commons-pool:jar:1.6:compile
  [INFO] +- org.nuiton.thirdparty:asm-attrs:jar:1.5.4-snapshot:compile
  [INFO] +- org.sonatype.sisu.inject:cglib:jar:2.2.2:compile
  [INFO] +- org.jvnet.hudson.dom4j:dom4j:jar:1.6.1-hudson-3:compile
  [INFO] +- org.hibernate:ejb3-persistence:pom:3.3.2.Beta1:compile
  [INFO] +- org.hibernate:hibernate:jar:3.2.6.ga:compile
  [INFO] |  +- net.sf.ehcache:ehcache:jar:1.2.3:compile
  [INFO] |  +- javax.transaction:jta:jar:1.0.1B:compile
  [INFO] |  +- asm:asm-attrs:jar:1.5.3:compile
  [INFO] |  +- dom4j:dom4j:jar:1.6.1:compile
  [INFO] |  +- antlr:antlr:jar:2.7.6:compile
  [INFO] |  \- cglib:cglib:jar:2.1_3:compile
  [INFO] +- org.hibernate:hibernate-annotations:jar:3.2.1.ga:compile
  [INFO] |  \- javax.persistence:persistence-api:jar:1.0:compile
  [INFO] +- org.hibernate:hibernate-commons-annotations:jar:3.0.0.ga:compile
  [INFO] +- org.hibernate:hibernate-entitymanager:jar:3.2.1.ga:compile
  [INFO] |  +- jboss:javassist:jar:3.3.ga:compile
  [INFO] |  \- jboss:jboss-archive-browsing:jar:5.0.0alpha-200607201-119:compile
  [INFO] +- org.hibernate:hibernate-validator-annotation-processor:jar:5.0.0.Beta1:compile
  [INFO] +- commons-beanutils:commons-beanutils-bean-collections:jar:1.8.3:compile
  [INFO] +- jboss:jboss-common:jar:4.2.2.GA:compile
  [INFO] +- javassist:javassist:jar:3.12.1.GA:compile
  [INFO] +- hibernate:hibernate-entitymanager:pom:3.4.0.GA:compile
  [INFO] |  +- org.hibernate:ejb3-persistence:jar:1.0.2.GA:compile
  [INFO] |  \- org.hibernate:hibernate-core:jar:3.3.0.SP1:compile
  [INFO] +- org.hibernate:hibernate-validator:jar:5.0.0.Beta1:compile
  [INFO] |  +- javax.validation:validation-api:jar:1.1.0.Beta3:compile
  [INFO] |  +- org.jboss.logging:jboss-logging:jar:3.1.1.GA:compile
  [INFO] |  +- com.fasterxml:classmate:jar:0.8.0:compile
  [INFO] |  +- de.odysseus.juel:juel-spi:jar:2.2.5:compile
  [INFO] |  +- de.odysseus.juel:juel-api:jar:2.2.5:compile
  [INFO] |  \- de.odysseus.juel:juel-impl:jar:2.2.5:compile
  [INFO] +- commons-collections:commons-collections:jar:3.1:compile
  [INFO] +- commons-logging:commons-logging:jar:1.1.1:compile
  [INFO] +- org.slf4j:slf4j-api:jar:1.7.2:compile
  [INFO] +- org.slf4j:slf4j-simple:jar:1.7.2:compile
  [INFO] +- com.google.sitebricks:slf4j:jar:0.8.3:compile
  [INFO] |  \- com.google.inject:guice:jar:2.0:compile
  [INFO] |     \- aopalliance:aopalliance:jar:1.0:compile
  [INFO] +- org.slf4j:slf4j-log4j12:jar:1.7.2:compile
  [INFO] |  \- log4j:log4j:jar:1.2.17:compile
  [INFO] +- postgresql:postgresql:jar:9.1-901.jdbc4:compile
  [INFO] +- com.tunnelvisionlabs:antlr4:jar:4.0:compile
  [INFO] |  +- com.tunnelvisionlabs:antlr4-runtime:jar:4.0:compile
  [INFO] |  |  \- org.abego.treelayout:org.abego.treelayout.core:jar:1.0.1:compile
  [INFO] |  +- org.antlr:antlr-runtime:jar:3.5:compile
  [INFO] |  |  \- org.antlr:stringtemplate:jar:3.2.1:compile
  [INFO] |  \- org.antlr:ST4:jar:4.0.7:compile
  [INFO] +- cglib:cglib-nodep:jar:2.2.2:compile
  [INFO] +- org.ow2.asm:asm:jar:4.1:compile
  [INFO] \- org.ow2.asm:asm-util:jar:4.1:compile
  [INFO]    \- org.ow2.asm:asm-tree:jar:4.1:compile
  </code></pre>
  
  <p>This is get after run the mvn dependency:tree ,
  i have checked my dependency for cglib but i not sure for version compatible, kindly check let me know which are compatible for my project.</p>
  
  <p>Thanks</p>