java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].Sta ndardContext[/TestingServlet]]

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    • java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].Sta ndardContext[/TestingServlet]] at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222) at java.util.concurrent.FutureTask.get(FutureTask.java:83) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1128) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:782) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907) at java.lang.Thread.run(Thread.java:619) Caused by: org.apache.catalina.LifecycleException: Failed to start component [St andardEngine[Catalina].StandardHost[localhost].StandardContext[/TestingServlet]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) ... 7 more Caused by: java.lang.UnsupportedClassVersionError: org/dkt/javabrains/TestingSer vlet : Unsupported major.minor version 51.0 (unable to load class org.dkt.javabr ains.TestingServlet) at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2893) 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.apache.catalina.startup.WebAnnotationSet.loadClass(WebAnnotationSet.java:480) at org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:130) at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:66) at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:381) at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:858) at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:345) 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.StandardContext.startInternal(StandardContext.java:5161) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 7 more

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