I am getting below error while deploying portlet of Liferay 6.0.3 version onto Liferay 6.2.0 version
com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering portlets for message-search-portlet
the error stack is below
com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering portlets for message-search-portletmessage-search-portlet
at com.liferay.portal.kernel.deploy.hot.BaseHotDeployListener.throwHotDeployException(BaseHotDeployListener.java:46)
at com.liferay.portal.deploy.hot.PortletHotDeployListener.invokeDeploy(PortletHotDeployListener.java:127)
at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:205)
at com.liferay.portal.deploy.hot.HotDeployImpl.fireDeployEvent(HotDeployImpl.java:96)
at com.liferay.portal.kernel.deploy.hot.HotDeployUtil.fireDeployEvent(HotDeployUtil.java:27)
at com.liferay.portal.kernel.servlet.PluginContextListener.fireDeployEvent(PluginContextListener.java:164)
at com.liferay.portal.kernel.servlet.PluginContextListener.doPortalInit(PluginContextListener.java:154)
at com.liferay.portal.kernel.util.BasePortalLifecycle.portalInit(BasePortalLifecycle.java:44)
at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:64)
at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:56)
at com.liferay.portal.kernel.util.BasePortalLifecycle.registerPortalLifecycle(BasePortalLifecycle.java:54)
at com.liferay.portal.kernel.servlet.PluginContextListener.contextInitialized(PluginContextListener.java:116)
at com.liferay.portal.kernel.servlet.SecurePluginContextListener.contextInitialized(SecurePluginContextListener.java:151)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3954)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1270)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1439)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:315)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1374)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1530)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1540)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1519)
at java.lang.Thread.run(Unknown Source)
Caused by: net.sf.ehcache.CacheException: Unable to load class net.sf.ehcache.store.DefaultElementValueComparator. Initial cause was net.sf.ehcache.store.DefaultElementValueComparator.<init>(net.sf.ehcache.config.CacheConfiguration)
at net.sf.ehcache.util.ClassLoaderUtil.createNewInstance(ClassLoaderUtil.java:100)
at net.sf.ehcache.config.ElementValueComparatorConfiguration.createElementComparatorInstance(ElementValueComparatorConfiguration.java:57)
at net.sf.ehcache.Cache.<init>(Cache.java:791)
at net.sf.ehcache.Cache.clone(Cache.java:2761)
at net.sf.ehcache.Cache.clone(Cache.java:163)
at net.sf.ehcache.CacheManager.cloneDefaultCache(CacheManager.java:1945)
at net.sf.ehcache.CacheManager.addCache(CacheManager.java:1218)
at com.liferay.portal.cache.ehcache.EhcachePortalCacheManager.addCache(EhcachePortalCacheManager.java:241)
at com.liferay.portal.cache.ehcache.EhcachePortalCacheManager.getCache(EhcachePortalCacheManager.java:136)
at com.liferay.portal.cache.MultiVMPoolImpl.getCache(MultiVMPoolImpl.java:47)
at com.liferay.portal.dao.orm.common.FinderCacheImpl._getPortalCache(FinderCacheImpl.java:231)
at com.liferay.portal.dao.orm.common.FinderCacheImpl.getResult(FinderCacheImpl.java:120)
at com.liferay.portal.kernel.dao.orm.FinderCacheUtil.getResult(FinderCacheUtil.java:47)
at com.liferay.portal.service.persistence.ResourceActionPersistenceImpl.findByName(ResourceActionPersistenceImpl.java:171)
at com.liferay.portal.service.persistence.ResourceActionPersistenceImpl.fetchByName_First(ResourceActionPersistenceImpl.java:308)
at com.liferay.portal.service.impl.ResourceActionLocalServiceImpl.checkResourceActions(ResourceActionLocalServiceImpl.java:91)
at com.liferay.portal.service.impl.ResourceActionLocalServiceImpl.checkResourceActions(ResourceActionLocalServiceImpl.java:62)
at sun.reflect.GeneratedMethodAccessor89.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.liferay.portal.spring.aop.ServiceBeanMethodInvocation.proceed(ServiceBeanMethodInvocation.java:115)
at com.liferay.portal.spring.transaction.DefaultTransactionExecutor.execute(DefaultTransactionExecutor.java:62)
at com.liferay.portal.spring.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:51)
at com.liferay.portal.spring.aop.ServiceBeanMethodInvocation.proceed(ServiceBeanMethodInvocation.java:111)
at com.liferay.portal.spring.aop.ServiceBeanAopProxy.invoke(ServiceBeanAopProxy.java:175)
at com.sun.proxy.$Proxy87.checkResourceActions(Unknown Source)
at com.liferay.portal.service.ResourceActionLocalServiceUtil.checkResourceActions(ResourceActionLocalServiceUtil.java:282)
at com.liferay.portal.deploy.hot.PortletHotDeployListener.doInvokeDeploy(PortletHotDeployListener.java:451)
at com.liferay.portal.deploy.hot.PortletHotDeployListener.invokeDeploy(PortletHotDeployListener.java:124)
... 25 more
Caused by: java.lang.NoSuchMethodException: net.sf.ehcache.store.DefaultElementValueComparator.<init>(net.sf.ehcache.config.CacheConfiguration)
at java.lang.Class.getConstructor0(Unknown Source)
at java.lang.Class.getConstructor(Unknown Source)
at net.sf.ehcache.util.ClassLoaderUtil.createNewInstance(ClassLoaderUtil.java:91)
... 53 more
Kindly suggest best solution for resolving this issue, Thanks in advance