Java – Error while deploying jar in weblogic

An error occurred during activation of changes, please see the log for details.

Message icon – Error Exception preparing module:
EJBModule(Demo_web_service) [EJB:011023]An error occurred while
reading the deployment descriptor. The error was: Error processing
annotations: . Message icon – Error There are 1 nested errors:
weblogic.j2ee.dd.xml.AnnotationProcessException: [EJB:015002]Unable to
load class com.cms.webservice.CMSWebServiceBean in Jar
D:\Aswin\Demo_web_service.jar : java.lang.ClassNotFoundException:
Class bytes found but defineClass()failed for:
'com.cms.webservice.CMSWebServiceBean'

Message icon – Error Exception preparing module:
EJBModule(Demo_web_service) Unable to deploy EJB: Demo_web_service.jar
from Demo_web_service.jar: There are 1 nested errors:
java.io.IOException: JDT compilation error! at
weblogic.ejb.container.ejbc.CompilerForJDT.compile(CompilerForJDT.java:66)
at
weblogic.ejb.container.ejbc.EJBCompiler.doCompile(EJBCompiler.java:358)
at
weblogic.ejb.container.ejbc.EJBCompiler.compileEJB(EJBCompiler.java:556)
at
weblogic.ejb.container.ejbc.EJBCompiler.compileEJB(EJBCompiler.java:523)
at
weblogic.ejb.container.deployer.EJBDeployer.runEJBC(EJBDeployer.java:441)
at
weblogic.ejb.container.deployer.EJBDeployer.compileJar(EJBDeployer.java:766)
at
weblogic.ejb.container.deployer.EJBDeployer.compileIfNecessary(EJBDeployer.java:666)
at
weblogic.ejb.container.deployer.EJBDeployer.prepare(EJBDeployer.java:1241)
at
weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:427)
at
weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:199)
at
weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:391)
at
weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:83)
at
weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:59)
at
weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:43)
at
weblogic.application.internal.BaseDeployment$1.next(BaseDeployment.java:1221)
at
weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:83)
at
weblogic.application.internal.BaseDeployment.prepare(BaseDeployment.java:367)
at
weblogic.application.internal.SingleModuleDeployment.prepare(SingleModuleDeployment.java:39)
at
weblogic.application.internal.DeploymentStateChecker.prepare(DeploymentStateChecker.java:154)
at
weblogic.deploy.internal.targetserver.AppContainerInvoker.prepare(AppContainerInvoker.java:60)
at
weblogic.deploy.internal.targetserver.operations.ActivateOperation.createAndPrepareContainer(ActivateOperation.java:207)
at
weblogic.deploy.internal.targetserver.operations.ActivateOperation.doPrepare(ActivateOperation.java:98)
at
weblogic.deploy.internal.targetserver.operations.AbstractOperation.prepare(AbstractOperation.java:217)
at
weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentPrepare(DeploymentManager.java:747)
at
weblogic.deploy.internal.targetserver.DeploymentManager.prepareDeploymentList(DeploymentManager.java:1216)
at
weblogic.deploy.internal.targetserver.DeploymentManager.handlePrepare(DeploymentManager.java:250)
at
weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.prepare(DeploymentServiceDispatcher.java:159)
at
weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doPrepareCallback(DeploymentReceiverCallbackDeliverer.java:157)
at
weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$000(DeploymentReceiverCallbackDeliverer.java:12)
at
weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$1.run(DeploymentReceiverCallbackDeliverer.java:45)
at
weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:516)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201) at
weblogic.work.ExecuteThread.run(ExecuteThread.java:173) Message icon –
Error JDT compilation error!

Can you please help me out to solve this?