Kaleo-forms plugin unable to deploy due to Unsupported major.minor version 51.0

• Type: Regression Bug
• Status: Closed
• Resolution: Won't Fix
• Affects Version/s: 6.1.X EE
• Fix Version/s: None
• Component/s: Business Productivity, Business Productivity > Kaleo Workflow Forms
• Labels: None
• Fix Priority: 3
• JDK:
  Oracle Sun JDK 6
• Git Pull Request: https://github.com/brianchandotcom/liferay-plugins-ee/pull/19611

Note, this is a 61x only issue.

When attempting to deploy the Kaleo-Forms plugin, the following stacktrace is thrown:

18:31:08,617 ERROR [localhost-startStop-2][HotDeployImpl:111] com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering plugins for kaleo-forms-portlet
com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering plugins for kaleo-forms-portlet
        at com.liferay.portal.kernel.deploy.hot.BaseHotDeployListener.throwHotDeployException(BaseHotDeployListener.java:46)
        at com.liferay.portal.deploy.hot.PluginPackageHotDeployListener.invokeDeploy(PluginPackageHotDeployListener.java:64)
        at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:214)
        at com.liferay.portal.deploy.hot.HotDeployImpl.fireDeployEvent(HotDeployImpl.java:98)
        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 com.liferay.portal.security.lang.DoPrivilegedHandler.doInvoke(DoPrivilegedHandler.java:88)
        at com.liferay.portal.security.lang.DoPrivilegedHandler.invoke(DoPrivilegedHandler.java:56)
        at com.sun.proxy.$Proxy29.fireDeployEvent(Unknown Source)
        at com.liferay.portal.kernel.deploy.hot.HotDeployUtil.fireDeployEvent(HotDeployUtil.java:28)
        at com.liferay.portal.kernel.servlet.PluginContextListener.fireDeployEvent(PluginContextListener.java:173)
        at com.liferay.portal.kernel.servlet.PluginContextListener.doPortalInit(PluginContextListener.java:157)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.portalInit(BasePortalLifecycle.java:44)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:74)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:58)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.registerPortalLifecycle(BasePortalLifecycle.java:54)
        at com.liferay.portal.kernel.servlet.PluginContextListener.contextInitialized(PluginContextListener.java:107)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4887)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5381)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1114)
        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1672)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
        at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.UnsupportedClassVersionError: com/liferay/portal/workflow/kaleo/forms/service/messaging/ClpMessageListener : Unsupported major.minor version 51.0 (unable to load class com.liferay.portal.workflow.kaleo.forms.service.messaging.ClpMessageListener)
        at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2899)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1173)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1681)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
        at com.liferay.portal.kernel.deploy.hot.BaseHotDeployListener.registerClpMessageListeners(BaseHotDeployListener.java:121)
        at com.liferay.portal.deploy.hot.PluginPackageHotDeployListener.doInvokeDeploy(PluginPackageHotDeployListener.java:128)
        at com.liferay.portal.deploy.hot.PluginPackageHotDeployListener.invokeDeploy(PluginPackageHotDeployListener.java:61)
        ... 31 more
Sep 2, 2016 6:31:08 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring root WebApplicationContext
Loading file:/F:/Bundles/HPE-153/t5/tomcat-7.0.40/temp/6-kaleo-forms-portlet/WEB-INF/classes/service.properties
18:31:08,780 ERROR [localhost-startStop-2][PortletApplicationContext:111] org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Bean class [com.liferay.portal.workflow.kaleo.forms.service.impl.KaleoProcessLocalServiceImpl] not found_Offending resource: ServletContext resource [/WEB-INF/classes/META-INF/portlet-spring.xml]_Bean 'com.liferay.portal.workflow.kaleo.forms.service.KaleoProcessLocalService'; nested exception is java.lang.ClassNotFoundException: com.liferay.portal.workflow.kaleo.forms.service.impl.KaleoProcessLocalServiceImpl [Sanitized]
org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Bean class [com.liferay.portal.workflow.kaleo.forms.service.impl.KaleoProcessLocalServiceImpl] not found_Offending resource: ServletContext resource [/WEB-INF/classes/META-INF/portlet-spring.xml]_Bean 'com.liferay.portal.workflow.kaleo.forms.service.KaleoProcessLocalService'; nested exception is java.lang.ClassNotFoundException: com.liferay.portal.workflow.kaleo.forms.service.impl.KaleoProcessLocalServiceImpl [Sanitized]
        at org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:68)
        at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:85)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.error(BeanDefinitionParserDelegate.java:291)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseBeanDefinitionElement(BeanDefinitionParserDelegate.java:491)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseBeanDefinitionElement(BeanDefinitionParserDelegate.java:396)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseBeanDefinitionElement(BeanDefinitionParserDelegate.java:365)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.processBeanDefinition(DefaultBeanDefinitionDocumentReader.java:258)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseDefaultElement(DefaultBeanDefinitionDocumentReader.java:153)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:132)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:93)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
        at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:143)
        at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:178)
        at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:149)
        at com.liferay.portal.spring.context.PortletApplicationContext.loadBeanDefinitions(PortletApplicationContext.java:121)
        at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:93)
        at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130)
        at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:467)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:397)
        at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:282)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:204)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
        at com.liferay.portal.spring.context.PortletContextLoaderListener.contextInitialized(PortletContextLoaderListener.java:85)
        at com.liferay.portal.deploy.hot.SpringHotDeployListener.doInvokeDeploy(SpringHotDeployListener.java:79)
        at com.liferay.portal.deploy.hot.SpringHotDeployListener.invokeDeploy(SpringHotDeployListener.java:41)
        at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:214)
        at com.liferay.portal.deploy.hot.HotDeployImpl.fireDeployEvent(HotDeployImpl.java:98)
        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 com.liferay.portal.security.lang.DoPrivilegedHandler.doInvoke(DoPrivilegedHandler.java:88)
        at com.liferay.portal.security.lang.DoPrivilegedHandler.invoke(DoPrivilegedHandler.java:56)
        at com.sun.proxy.$Proxy29.fireDeployEvent(Unknown Source)
        at com.liferay.portal.kernel.deploy.hot.HotDeployUtil.fireDeployEvent(HotDeployUtil.java:28)
        at com.liferay.portal.kernel.servlet.PluginContextListener.fireDeployEvent(PluginContextListener.java:173)
        at com.liferay.portal.kernel.servlet.PluginContextListener.doPortalInit(PluginContextListener.java:157)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.portalInit(BasePortalLifecycle.java:44)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:74)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:58)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.registerPortalLifecycle(BasePortalLifecycle.java:54)
        at com.liferay.portal.kernel.servlet.PluginContextListener.contextInitialized(PluginContextListener.java:107)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4887)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5381)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1114)
        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1672)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
        at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.ClassNotFoundException: com.liferay.portal.workflow.kaleo.forms.service.impl.KaleoProcessLocalServiceImpl
        at java.lang.ClassLoader.findClass(ClassLoader.java:358)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
        at com.liferay.portal.spring.util.FilterClassLoader.loadClass(FilterClassLoader.java:41)
        at org.springframework.util.ClassUtils.forName(ClassUtils.java:257)
        at org.springframework.beans.factory.support.BeanDefinitionReaderUtils.createBeanDefinition(BeanDefinitionReaderUtils.java:63)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.createBeanDefinition(BeanDefinitionParserDelegate.java:616)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseBeanDefinitionElement(BeanDefinitionParserDelegate.java:472)
        ... 55 more
18:31:09,051 ERROR [localhost-startStop-2][ContextLoader:227] Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'liferayHibernateSessionFactory' defined in ServletContext resource [/WEB-INF/classes/META-INF/hibernate-spring.xml]: Invocation of init method failed; nested exception is org.hibernate.MappingException: entity class not found: com.liferay.portal.workflow.kaleo.forms.model.impl.KaleoProcessImpl
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1422)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:518)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:455)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:293)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:290)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:192)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
        at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:282)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:204)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
        at com.liferay.portal.spring.context.PortletContextLoaderListener.contextInitialized(PortletContextLoaderListener.java:85)
        at com.liferay.portal.deploy.hot.SpringHotDeployListener.doInvokeDeploy(SpringHotDeployListener.java:79)
        at com.liferay.portal.deploy.hot.SpringHotDeployListener.invokeDeploy(SpringHotDeployListener.java:41)
        at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:214)
        at com.liferay.portal.deploy.hot.HotDeployImpl.fireDeployEvent(HotDeployImpl.java:98)
        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 com.liferay.portal.security.lang.DoPrivilegedHandler.doInvoke(DoPrivilegedHandler.java:88)
        at com.liferay.portal.security.lang.DoPrivilegedHandler.invoke(DoPrivilegedHandler.java:56)
        at com.sun.proxy.$Proxy29.fireDeployEvent(Unknown Source)
        at com.liferay.portal.kernel.deploy.hot.HotDeployUtil.fireDeployEvent(HotDeployUtil.java:28)
        at com.liferay.portal.kernel.servlet.PluginContextListener.fireDeployEvent(PluginContextListener.java:173)
        at com.liferay.portal.kernel.servlet.PluginContextListener.doPortalInit(PluginContextListener.java:157)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.portalInit(BasePortalLifecycle.java:44)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:74)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:58)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.registerPortalLifecycle(BasePortalLifecycle.java:54)
        at com.liferay.portal.kernel.servlet.PluginContextListener.contextInitialized(PluginContextListener.java:107)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4887)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5381)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1114)
        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1672)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
        at java.lang.Thread.run(Thread.java:662)
Caused by: org.hibernate.MappingException: entity class not found: com.liferay.portal.workflow.kaleo.forms.model.impl.KaleoProcessImpl
        at org.hibernate.mapping.PersistentClass.getMappedClass(PersistentClass.java:125)
        at org.hibernate.tuple.PropertyFactory.getGetter(PropertyFactory.java:191)
        at org.hibernate.tuple.PropertyFactory.buildIdentifierProperty(PropertyFactory.java:67)
        at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:135)
        at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:485)
        at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:133)
        at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:84)
        at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:286)
        at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1872)
        at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:860)
        at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:779)
        at com.liferay.portal.spring.hibernate.PortalHibernateConfiguration.buildSessionFactory(PortalHibernateConfiguration.java:65)
        at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1479)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1419)
        ... 46 more
Caused by: java.lang.ClassNotFoundException: com.liferay.portal.workflow.kaleo.forms.model.impl.KaleoProcessImpl
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:171)
        at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:192)
        at org.hibernate.mapping.PersistentClass.getMappedClass(PersistentClass.java:122)
        ... 60 more
18:31:09,238 ERROR [localhost-startStop-2][HotDeployImpl:111] com.liferay.portal.kernel.deploy.hot.HotDeployException: Error initializing Spring for kaleo-forms-portlet
com.liferay.portal.kernel.deploy.hot.HotDeployException: Error initializing Spring for kaleo-forms-portlet
        at com.liferay.portal.kernel.deploy.hot.BaseHotDeployListener.throwHotDeployException(BaseHotDeployListener.java:46)
        at com.liferay.portal.deploy.hot.SpringHotDeployListener.invokeDeploy(SpringHotDeployListener.java:44)
        at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:214)
        at com.liferay.portal.deploy.hot.HotDeployImpl.fireDeployEvent(HotDeployImpl.java:98)
        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 com.liferay.portal.security.lang.DoPrivilegedHandler.doInvoke(DoPrivilegedHandler.java:88)
        at com.liferay.portal.security.lang.DoPrivilegedHandler.invoke(DoPrivilegedHandler.java:56)
        at com.sun.proxy.$Proxy29.fireDeployEvent(Unknown Source)
        at com.liferay.portal.kernel.deploy.hot.HotDeployUtil.fireDeployEvent(HotDeployUtil.java:28)
        at com.liferay.portal.kernel.servlet.PluginContextListener.fireDeployEvent(PluginContextListener.java:173)
        at com.liferay.portal.kernel.servlet.PluginContextListener.doPortalInit(PluginContextListener.java:157)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.portalInit(BasePortalLifecycle.java:44)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:74)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:58)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.registerPortalLifecycle(BasePortalLifecycle.java:54)
        at com.liferay.portal.kernel.servlet.PluginContextListener.contextInitialized(PluginContextListener.java:107)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4887)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5381)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1114)
        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1672)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
        at java.lang.Thread.run(Thread.java:662)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'liferayHibernateSessionFactory' defined in ServletContext resource [/WEB-INF/classes/META-INF/hibernate-spring.xml]: Invocation of init method failed; nested exception is org.hibernate.MappingException: entity class not found: com.liferay.portal.workflow.kaleo.forms.model.impl.KaleoProcessImpl
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1422)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:518)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:455)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:293)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:290)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:192)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
        at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:282)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:204)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
        at com.liferay.portal.spring.context.PortletContextLoaderListener.contextInitialized(PortletContextLoaderListener.java:85)
        at com.liferay.portal.deploy.hot.SpringHotDeployListener.doInvokeDeploy(SpringHotDeployListener.java:79)
        at com.liferay.portal.deploy.hot.SpringHotDeployListener.invokeDeploy(SpringHotDeployListener.java:41)
        ... 31 more
Caused by: org.hibernate.MappingException: entity class not found: com.liferay.portal.workflow.kaleo.forms.model.impl.KaleoProcessImpl
        at org.hibernate.mapping.PersistentClass.getMappedClass(PersistentClass.java:125)
        at org.hibernate.tuple.PropertyFactory.getGetter(PropertyFactory.java:191)
        at org.hibernate.tuple.PropertyFactory.buildIdentifierProperty(PropertyFactory.java:67)
        at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:135)
        at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:485)
        at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:133)
        at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:84)
        at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:286)
        at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1872)
        at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:860)
        at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:779)
        at com.liferay.portal.spring.hibernate.PortalHibernateConfiguration.buildSessionFactory(PortalHibernateConfiguration.java:65)
        at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1479)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1419)
        ... 46 more
Caused by: java.lang.ClassNotFoundException: com.liferay.portal.workflow.kaleo.forms.model.impl.KaleoProcessImpl
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:171)
        at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:192)
        at org.hibernate.mapping.PersistentClass.getMappedClass(PersistentClass.java:122)
        ... 60 more
18:31:09,433 INFO  [localhost-startStop-2][HookHotDeployListener:587] Registering hook for kaleo-forms-portlet
18:31:09,585 ERROR [localhost-startStop-2][HotDeployImpl:111] com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering hook for kaleo-forms-portlet
com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering hook for kaleo-forms-portlet
        at com.liferay.portal.kernel.deploy.hot.BaseHotDeployListener.throwHotDeployException(BaseHotDeployListener.java:46)
        at com.liferay.portal.deploy.hot.HookHotDeployListener.invokeDeploy(HookHotDeployListener.java:280)
        at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:214)
        at com.liferay.portal.deploy.hot.HotDeployImpl.fireDeployEvent(HotDeployImpl.java:98)
        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 com.liferay.portal.security.lang.DoPrivilegedHandler.doInvoke(DoPrivilegedHandler.java:88)
        at com.liferay.portal.security.lang.DoPrivilegedHandler.invoke(DoPrivilegedHandler.java:56)
        at com.sun.proxy.$Proxy29.fireDeployEvent(Unknown Source)
        at com.liferay.portal.kernel.deploy.hot.HotDeployUtil.fireDeployEvent(HotDeployUtil.java:28)
        at com.liferay.portal.kernel.servlet.PluginContextListener.fireDeployEvent(PluginContextListener.java:173)
        at com.liferay.portal.kernel.servlet.PluginContextListener.doPortalInit(PluginContextListener.java:157)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.portalInit(BasePortalLifecycle.java:44)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:74)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:58)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.registerPortalLifecycle(BasePortalLifecycle.java:54)
        at com.liferay.portal.kernel.servlet.PluginContextListener.contextInitialized(PluginContextListener.java:107)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4887)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5381)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1114)
        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1672)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
        at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.UnsupportedClassVersionError: com/liferay/portal/workflow/kaleo/forms/service/messaging/ClpMessageListener : Unsupported major.minor version 51.0 (unable to load class com.liferay.portal.workflow.kaleo.forms.service.messaging.ClpMessageListener)
        at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2899)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1173)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1681)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
        at com.liferay.portal.kernel.deploy.hot.BaseHotDeployListener.registerClpMessageListeners(BaseHotDeployListener.java:121)
        at com.liferay.portal.deploy.hot.HookHotDeployListener.doInvokeDeploy(HookHotDeployListener.java:708)
        at com.liferay.portal.deploy.hot.HookHotDeployListener.invokeDeploy(HookHotDeployListener.java:277)
        ... 31 more
18:31:09,683 INFO  [localhost-startStop-2][PortletHotDeployListener:295] Registering portlets for kaleo-forms-portlet
18:31:09,768 ERROR [localhost-startStop-2][HotDeployImpl:111] com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering portlets for kaleo-forms-portlet
com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering portlets for kaleo-forms-portlet
        at com.liferay.portal.kernel.deploy.hot.BaseHotDeployListener.throwHotDeployException(BaseHotDeployListener.java:46)
        at com.liferay.portal.deploy.hot.PortletHotDeployListener.invokeDeploy(PortletHotDeployListener.java:123)
        at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:214)
        at com.liferay.portal.deploy.hot.HotDeployImpl.fireDeployEvent(HotDeployImpl.java:98)
        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 com.liferay.portal.security.lang.DoPrivilegedHandler.doInvoke(DoPrivilegedHandler.java:88)
        at com.liferay.portal.security.lang.DoPrivilegedHandler.invoke(DoPrivilegedHandler.java:56)
        at com.sun.proxy.$Proxy29.fireDeployEvent(Unknown Source)
        at com.liferay.portal.kernel.deploy.hot.HotDeployUtil.fireDeployEvent(HotDeployUtil.java:28)
        at com.liferay.portal.kernel.servlet.PluginContextListener.fireDeployEvent(PluginContextListener.java:173)
        at com.liferay.portal.kernel.servlet.PluginContextListener.doPortalInit(PluginContextListener.java:157)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.portalInit(BasePortalLifecycle.java:44)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:74)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:58)
        at com.liferay.portal.kernel.util.BasePortalLifecycle.registerPortalLifecycle(BasePortalLifecycle.java:54)
        at com.liferay.portal.kernel.servlet.PluginContextListener.contextInitialized(PluginContextListener.java:107)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4887)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5381)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1114)
        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1672)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
        at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.UnsupportedClassVersionError: com/liferay/portal/workflow/kaleo/forms/model/KaleoProcess : Unsupported major.minor version 51.0 (unable to load class com.liferay.portal.workflow.kaleo.forms.model.KaleoProcess)
        at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2899)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1173)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1681)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
        at com.liferay.portal.workflow.kaleo.forms.workflow.KaleoProcessWorkflowHandler.<clinit>(KaleoProcessWorkflowHandler.java:43)
        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 java.lang.Class.newInstance0(Class.java:357)
        at java.lang.Class.newInstance(Class.java:310)
        at com.liferay.portal.kernel.util.InstanceFactory.newInstance(InstanceFactory.java:63)
        at com.liferay.portal.kernel.util.InstanceFactory.newInstance(InstanceFactory.java:27)
        at com.liferay.portal.kernel.util.ProxyFactory.newInstance(ProxyFactory.java:38)
        at com.liferay.portlet.PortletBagFactory.newInstance(PortletBagFactory.java:737)
        at com.liferay.portlet.PortletBagFactory.newInstance(PortletBagFactory.java:729)
        at com.liferay.portlet.PortletBagFactory.create(PortletBagFactory.java:238)
        at com.liferay.portal.deploy.hot.PortletHotDeployListener.initPortlet(PortletHotDeployListener.java:541)
        at com.liferay.portal.deploy.hot.PortletHotDeployListener.doInvokeDeploy(PortletHotDeployListener.java:321)
        at com.liferay.portal.deploy.hot.PortletHotDeployListener.invokeDeploy(PortletHotDeployListener.java:120)
        ... 31 more
Sep 2, 2016 6:31:09 PM org.apache.catalina.core.ApplicationContext log
SEVERE: StandardWrapper.Throwable
java.lang.UnsupportedClassVersionError: com/liferay/portal/workflow/kaleo/forms/service/KaleoProcessService : Unsupported major.minor version 51.0 (unable to load class com.liferay.portal.workflow.kaleo.forms.service.KaleoProcessService)
        at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2899)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1173)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1681)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
        at com.liferay.portal.jsonwebservice.JSONWebServiceConfigurator._onJSONWebServiceClass(JSONWebServiceConfigurator.java:310)
        at com.liferay.portal.jsonwebservice.JSONWebServiceConfigurator.onEntry(JSONWebServiceConfigurator.java:213)
        at jodd.io.findfile.ClassFinder.scanEntry(ClassFinder.java:376)
        at jodd.io.findfile.ClassFinder.scanJarFile(ClassFinder.java:269)
        at jodd.io.findfile.ClassFinder.scanPath(ClassFinder.java:238)
        at jodd.io.findfile.ClassFinder.scanPaths(ClassFinder.java:179)
        at com.liferay.portal.jsonwebservice.JSONWebServiceConfigurator._configure(JSONWebServiceConfigurator.java:229)
        at com.liferay.portal.jsonwebservice.JSONWebServiceConfigurator.configure(JSONWebServiceConfigurator.java:172)
        at com.liferay.portal.jsonwebservice.JSONWebServiceServiceAction.<init>(JSONWebServiceServiceAction.java:53)
        at com.liferay.portal.jsonwebservice.JSONWebServiceServlet.getJSONAction(JSONWebServiceServlet.java:138)
        at com.liferay.portal.servlet.JSONServlet.init(JSONServlet.java:52)
        at com.liferay.portal.kernel.servlet.PortalClassLoaderServlet.portalInit(PortalClassLoaderServlet.java:80)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:74)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:58)
        at com.liferay.portal.kernel.servlet.PortalClassLoaderServlet.init(PortalClassLoaderServlet.java:49)
        at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1280)
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1193)
        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1088)
        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5123)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5407)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1114)
        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1672)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
        at java.lang.Thread.run(Thread.java:662)
Sep 2, 2016 6:31:10 PM org.apache.catalina.core.StandardContext loadOnStartup
SEVERE: Servlet /kaleo-forms-portlet threw load() exception
java.lang.UnsupportedClassVersionError: com/liferay/portal/workflow/kaleo/forms/service/KaleoProcessService : Unsupported major.minor version 51.0 (unable to load class com.liferay.portal.workflow.kaleo.forms.service.KaleoProcessService)
        at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2899)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1173)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1681)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
        at com.liferay.portal.jsonwebservice.JSONWebServiceConfigurator._onJSONWebServiceClass(JSONWebServiceConfigurator.java:310)
        at com.liferay.portal.jsonwebservice.JSONWebServiceConfigurator.onEntry(JSONWebServiceConfigurator.java:213)
        at jodd.io.findfile.ClassFinder.scanEntry(ClassFinder.java:376)
        at jodd.io.findfile.ClassFinder.scanJarFile(ClassFinder.java:269)
        at jodd.io.findfile.ClassFinder.scanPath(ClassFinder.java:238)
        at jodd.io.findfile.ClassFinder.scanPaths(ClassFinder.java:179)
        at com.liferay.portal.jsonwebservice.JSONWebServiceConfigurator._configure(JSONWebServiceConfigurator.java:229)
        at com.liferay.portal.jsonwebservice.JSONWebServiceConfigurator.configure(JSONWebServiceConfigurator.java:172)
        at com.liferay.portal.jsonwebservice.JSONWebServiceServiceAction.<init>(JSONWebServiceServiceAction.java:53)
        at com.liferay.portal.jsonwebservice.JSONWebServiceServlet.getJSONAction(JSONWebServiceServlet.java:138)
        at com.liferay.portal.servlet.JSONServlet.init(JSONServlet.java:52)
        at com.liferay.portal.kernel.servlet.PortalClassLoaderServlet.portalInit(PortalClassLoaderServlet.java:80)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:74)
        at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:58)
        at com.liferay.portal.kernel.servlet.PortalClassLoaderServlet.init(PortalClassLoaderServlet.java:49)
        at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1280)
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1193)
        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1088)
        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5123)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5407)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1114)
        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1672)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
        at java.lang.Thread.run(Thread.java:662)
Exception in thread "Thread-40" java.lang.UnsupportedClassVersionError: com/liferay/portal/workflow/kaleo/forms/model/KaleoProcessLinkSoap : Unsupported major.minor version 51.0 (unable to load class com.liferay.portal.workflow.kaleo.forms.model.KaleoProcessLinkSoap)
        at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2899)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1173)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1681)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:249)
        at org.apache.axis.utils.ClassUtils$2.run(ClassUtils.java:177)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.apache.axis.utils.ClassUtils.loadClass(ClassUtils.java:160)
        at org.apache.axis.utils.ClassUtils.forName(ClassUtils.java:100)
        at org.apache.axis.deployment.wsdd.WSDDTypeMapping.getLanguageSpecificType(WSDDTypeMapping.java:183)
        at org.apache.axis.deployment.wsdd.WSDDService.deployTypeMapping(WSDDService.java:542)
        at org.apache.axis.deployment.wsdd.WSDDService.initTMR(WSDDService.java:253)
        at org.apache.axis.deployment.wsdd.WSDDService.<init>(WSDDService.java:233)
        at org.apache.axis.deployment.wsdd.WSDDDeployment.<init>(WSDDDeployment.java:192)
        at org.apache.axis.deployment.wsdd.WSDDDocument.setDocument(WSDDDocument.java:139)
        at org.apache.axis.deployment.wsdd.WSDDDocument.<init>(WSDDDocument.java:65)
        at org.apache.axis.configuration.FileProvider.configureEngine(FileProvider.java:179)
        at org.apache.axis.AxisEngine.init(AxisEngine.java:172)
        at org.apache.axis.AxisEngine.<init>(AxisEngine.java:156)
        at org.apache.axis.server.AxisServer.<init>(AxisServer.java:88)
        at org.apache.axis.server.DefaultAxisServerFactory.createServer(DefaultAxisServerFactory.java:109)
        at org.apache.axis.server.DefaultAxisServerFactory.getServer(DefaultAxisServerFactory.java:73)
        at org.apache.axis.server.AxisServer.getServer(AxisServer.java:73)
        at org.apache.axis.transport.http.AxisServletBase.getEngine(AxisServletBase.java:185)
        at org.apache.axis.transport.http.AxisServletBase.getOption(AxisServletBase.java:396)
        at org.apache.axis.transport.http.AxisServletBase.init(AxisServletBase.java:112)
        at org.apache.axis.transport.http.AxisServlet.init(AxisServlet.java:156)
        at javax.servlet.GenericServlet.init(GenericServlet.java:160)
        at com.liferay.util.axis.AxisServlet.doInit(AxisServlet.java:230)
        at com.liferay.util.axis.AxisServlet$InitThread.run(AxisServlet.java:315)

Regardless of the local version of java the user is deploying/building Kaleo-Forms, this error is generated. This is because the library jar files were built using Java 7. The fix will be to regenerate these files with Java 6.

Reproduced
Plugins 61x: yes 54541006a60ba31eab50f00ab99b815ed1392010
Plugins 62x: no, 62x uses Java 7, so the generated jars are fine.
70x/master: no, the kaleo-forms plugin no longer exists.