tomcat 7 major.minor version 51.0

[Jan-Marcek]

If I place unifiedviews.war into tomcat7 then I get these exception.

SEVERE: Context initialization failed
org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: file [/usr/share/unifiedviews/webapp/WEB-INF/classes/cz/cuni/mff/xrg/odcs/frontend/gui/views/dpu/DPUPresenterImpl.class]; nested exception is java.lang.UnsupportedClassVersionError: cz/cuni/mff/xrg/odcs/frontend/navigation/Address : Unsupported major.minor version 51.0 (unable to load class cz.cuni.mff.xrg.odcs.frontend.navigation.Address)
        at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:262)
        at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:242)
        at org.springframework.context.annotation.ComponentScanBeanDefinitionParser.parse(ComponentScanBeanDefinitionParser.java:84)
        at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:73)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1423)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1413)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:184)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:140)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:111)
        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:174)
        at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:209)
        at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180)
        at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:124)
        at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:93)
        at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:131)
        at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:530)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:444)
        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 org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4790)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5284)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:899)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:875)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618)
        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:650)
        at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1582)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:701)
Caused by: java.lang.UnsupportedClassVersionError: cz/cuni/mff/xrg/odcs/frontend/navigation/Address : Unsupported major.minor version 51.0 (unable to load class cz.cuni.mff.xrg.odcs.frontend.navigation.Address)
        at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2905)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1170)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1678)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
        at org.springframework.core.type.classreading.RecursiveAnnotationAttributesVisitor.visitEnd(AnnotationAttributesReadingVisitor.java:163)
        at org.springframework.asm.ClassReader.a(Unknown Source)
        at org.springframework.asm.ClassReader.accept(Unknown Source)
        at org.springframework.asm.ClassReader.accept(Unknown Source)
        at org.springframework.core.type.classreading.SimpleMetadataReader.<init>(SimpleMetadataReader.java:59)
        at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:80)
        at org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:101)
        at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:238)
        ... 37 more
Dec 11, 2014 6:12:27 AM org.apache.catalina.core.StandardContext startInternal

[Jan-Marcek]

SOLUTION:
tomcat7 is running on different java version.

You have to set java 7 in tomcat. To resolve these add line into /etc/default/tomcat7.

JAVA_HOME= {location of your JAVA 7 HOME}

and restart tomcat:

 service tomcat7 restart