title: GroovyConsole ActiveMQ error: NoClassDefFoundError: Could not initialize class org.apache.activemq.ActiveMQPrefetchPolicy
body: <p>I am trying to run a very simple ActiveMQ client script in GroovyConsole.  I've included activemq-all-5.5.0.jar and slf4j-api-1.5.11.jar through the Script > Add Jar to ClassPath menu.  I see org.apache.activemq.ActiveMQPrefetchPolicy in the activemq jar, yet I am getting the exception below.</p>
  
  <p>Here is the script:</p>
  
  <pre><code>import org.apache.activemq.*
  import org.apache.activemq.command.*
  import javax.jms.*
  //
  //
  //
  
  def connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616")
  def connection =connectionFactory.createConnection()
  
  def session = connection.createSession(false,Session.AUTO_ACKNOWLEDGE)
  def dest = new ActiveMQQueue("fieldrepresentative.updatelatlong.queue")
  def producer = session.createProducer(dest)
  connection.start()
  
  def MapMessage message = session.createMapMessage()
  message.setString("employeeId", "TS12345")
  message.setString("latitude", "12345")
  message.setString("longitude", "97874")
  
  producer.send(message)
  
  session.close()
  connection.close()
  </code></pre>
  
  <p>The exception is:
      Jul 19, 2011 6:04:26 PM org.codehaus.groovy.runtime.StackTraceUtils sanitize</p>
  
  <pre><code>WARNING: Sanitizing stacktrace:
  
  java.lang.NoClassDefFoundError: Could not initialize class org.apache.activemq.ActiveMQPrefetchPolicy
  
  at org.apache.activemq.ActiveMQConnectionFactory.&lt;init&gt;(ActiveMQConnectionFactory.java:88)
  
  at org.apache.activemq.ActiveMQConnectionFactory.&lt;init&gt;(ActiveMQConnectionFactory.java:131)
  
  at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
  
  at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
  
  at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
  
  at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
  
  at org.codehaus.groovy.reflection.CachedConstructor.invoke(CachedConstructor.java:77)
  
  at org.codehaus.groovy.runtime.callsite.ConstructorSite$ConstructorSiteNoUnwrapNoCoerce.callConstructor(ConstructorSite.java:102)
  
  at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallConstructor(CallSiteArray.java:54)
  
  at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:182)
  
  at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:190)
  
  at MDBClient.run(MDBClient.groovy:8)
  
  at groovy.lang.GroovyShell.runScriptOrMainOrTestOrRunnable(GroovyShell.java:266)
  
  at groovy.lang.GroovyShell.run(GroovyShell.java:517)
  
  at groovy.lang.GroovyShell.run(GroovyShell.java:172)
  
  at groovy.lang.GroovyShell$run.call(Unknown Source)
  
  at groovy.ui.Console$_runScriptImpl_closure16.doCall(Console.groovy:910)
  
  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)
  
  at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
  
  at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
  
  at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:272)
  
  at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:885)
  
  at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:66)
  
  at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
  
  at groovy.ui.Console$_runScriptImpl_closure16.doCall(Console.groovy)
  
  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)
  
  at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
  
  at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
  
  at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:272)
  
  at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:885)
  
  at groovy.lang.Closure.call(Closure.java:405)
  
  at groovy.lang.Closure.call(Closure.java:399)
  
  at groovy.lang.Closure.run(Closure.java:483)
  
  at java.lang.Thread.run(Thread.java:662)
  
  java.lang.NoClassDefFoundError: Could not initialize class org.apache.activemq.ActiveMQPrefetchPolicy
  
  at org.apache.activemq.ActiveMQConnectionFactory.&lt;init&gt;(ActiveMQConnectionFactory.java:88)
  
  at org.apache.activemq.ActiveMQConnectionFactory.&lt;init&gt;(ActiveMQConnectionFactory.java:131)
  
  at MDBClient.run(MDBClient.groovy:8)
  </code></pre>