java.lang.Exception: DEBUG STACK TRACE for PoolBackedDataSource.close().

    java.lang.Exception: DEBUG STACK TRACE for PoolBackedDataSource.close().

java.lang.Exception: DEBUG STACK TRACE for PoolBackedDataSource.close().

at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.close(AbstractPoolBackedDataSource.java:417)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.beans.factory.support.DisposableBeanAdapter.invokeCustomDestroyMethod(DisposableBeanAdapter.java:350)
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:273)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:540)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:516)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:827)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:485)
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:921)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:490)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4973)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)
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:632)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1073)
at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1857)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
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:745)
DEBUG:Retrieved dependent beans for bean '(inner bean)#3182afc9': [org.springframework.aop.support.DefaultBeanFactoryPointcutAdvisor#0]
ERROR:Context initialization failed
org.springframework.beans.factory.CannotLoadBeanClassException: Error loading class [com.bw.yun.service.impl.UserServiceImpl] for bean with name 'userServiceImpl' defined in file [/home/bigdata/apache-tomcat-7.0.53/webapps/yun/WEB-INF/classes/com/bw/yun/service/impl/UserServiceImpl.class]: problem with class file or dependent class; nested exception is java.lang.UnsupportedClassVersionError: com/bw/yun/service/impl/UserServiceImpl : Unsupported major.minor version 52.0 (unable to load class com.bw.yun.service.impl.UserServiceImpl)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1328)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:594)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1394)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:957)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:683)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4973)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)
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:632)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1073)
at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1857)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.UnsupportedClassVersionError: com/bw/yun/service/impl/UserServiceImpl : Unsupported major.minor version 52.0 (unable to load class com.bw.yun.service.impl.UserServiceImpl)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2961)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1210)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1690)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
at org.springframework.util.ClassUtils.forName(ClassUtils.java:247)
at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:395)
at org.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass(AbstractBeanFactory.java:1346)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1317)
... 22 more
Jun 19, 2018 4:18:39 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error listenerStart
Jun 19, 2018 4:18:39 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Context [/yun] startup failed due to previous errors
Jun 19, 2018 4:18:39 AM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /home/bigdata/apache-tomcat-7.0.53/webapps/examples
Jun 19, 2018 4:18:40 AM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /home/bigdata/apache-tomcat-7.0.53/webapps/host-manager
Jun 19, 2018 4:18:40 AM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /home/bigdata/apache-tomcat-7.0.53/webapps/manager
Jun 19, 2018 4:18:40 AM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /home/bigdata/apache-tomcat-7.0.53/webapps/docs
Jun 19, 2018 4:18:40 AM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /home/bigdata/apache-tomcat-7.0.53/webapps/ROOT
Jun 19, 2018 4:18:40 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Jun 19, 2018 4:18:40 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]

Jun 19, 2018 4:18:40 AM org.apache.catalina.startup.Catalina start

去掉即可。。