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java.lang.LinkageError: loader (instance of  sun/misc/Launcher$ExtClassLoader): attempted  duplicate class definition for name: "org/xerial/snappy/SnappyNativeLoader"	at java.lang.ClassLoader.defineClass1(Native Method)	at java.lang.ClassLoader.defineClass(ClassLoader.java:791)	at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:601)	at org.xerial.snappy.SnappyLoader.injectSnappyNativeLoader(SnappyLoader.java:268)	at org.xerial.snappy.SnappyLoader.load(SnappyLoader.java:217)	at org.xerial.snappy.Snappy.(Snappy.java:44)	at org.apache.cassandra.transport.FrameCompressor$SnappyCompressor.(FrameCompressor.java:68)	at org.apache.cassandra.transport.FrameCompressor$SnappyCompressor.(FrameCompressor.java:43)	at com.datastax.driver.core.ProtocolOptions$Compression.(ProtocolOptions.java:32)	at com.datastax.driver.core.Cluster$Builder.(Cluster.java:256)	at com.xxxxxx.xxx.dao.utils.PersistentUnit$CCluster.(PersistentUnit.java:417)	at com.xxxxxx.xxx.dao.utils.PersistentUnit$CCluster.create(PersistentUnit.java:408)	at com.xxxxxx.xxx.dao.utils.PersistentUnit.buildCluster(PersistentUnit.java:85)	at com.xxxxxx.xxx.dao.utils.PersistentUnit.getSession(PersistentUnit.java:96)	at com.xxxxxx.xxx.dao.utils.PersistentUnit.getSession(PersistentUnit.java:126)	at com.xxxxxx.xxx.dao.repository.AbstractRepository.(AbstractRepository.java:108)	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:266)	at org.jboss.invocation.proxy.AbstractProxyFactory.afterClassLoad(AbstractProxyFactory.java:94)	at org.jboss.invocation.proxy.AbstractClassFactory.defineClass(AbstractClassFactory.java:166)	at org.jboss.invocation.proxy.AbstractProxyFactory.getCachedMethods(AbstractProxyFactory.java:145)	at org.jboss.as.ejb3.component.singleton.SingletonComponentDescription$4.configure(SingletonComponentDescription.java:185)	at org.jboss.as.ee.component.ComponentDescription$DefaultComponentConfigurator.configure(ComponentDescription.java:929)	at org.jboss.as.ee.component.deployers.EEModuleConfigurationProcessor.deploy(EEModuleConfigurationProcessor.java:80)	at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:120)	at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811)	at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at java.lang.Thread.run(Thread.java:722)