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

Coderanch | Jdinesh Tiwari | 4 years ago
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Root Cause Analysis

  1. 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()
  2. Glassfish Core
    ContainerBase$StartChild.call
    1. org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2893)
    2. org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1170)
    3. org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1678)
    4. org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
    5. org.apache.catalina.startup.WebAnnotationSet.loadClass(WebAnnotationSet.java:480)
    6. org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:130)
    7. org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:66)
    8. org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:381)
    9. org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:858)
    10. org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:345)
    11. org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
    12. org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
    13. org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5161)
    14. org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    15. org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566)
    16. org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556)
    16 frames
  3. Java RT
    Thread.run
    1. java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    2. java.util.concurrent.FutureTask.run(FutureTask.java:138)
    3. java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
    4. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
    5. java.lang.Thread.run(Thread.java:619)
    5 frames