java.lang.NullPointerException: Cannot invoke method getAt() on null object

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Root Cause Analysis

  1. java.lang.NullPointerException

    Cannot invoke method getAt() on null object

    at org.codehaus.groovy.runtime.NullObject.invokeMethod()
  2. Groovy
    AbstractCallSite.call
    1. org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java:77)[groovy-all-1.7.8.jar:1.7.8]
    2. org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:45)[groovy-all-1.7.8.jar:1.7.8]
    3. org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40)[groovy-all-1.7.8.jar:1.7.8]
    4. org.codehaus.groovy.runtime.callsite.NullCallSite.call(NullCallSite.java:32)[groovy-all-1.7.8.jar:1.7.8]
    5. org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40)[groovy-all-1.7.8.jar:1.7.8]
    6. org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)[groovy-all-1.7.8.jar:1.7.8]
    7. org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124)[groovy-all-1.7.8.jar:1.7.8]
    7 frames
  3. Grails
    GrailsPluginManagerFactoryBean.afterPropertiesSet
    1. org.codehaus.groovy.grails.plugins.GrailsPluginUtils.isValidVersion(GrailsPluginUtils.groovy:77)[grails-core-1.3.7.jar:1.3.7]
    2. org.codehaus.groovy.grails.plugins.AbstractGrailsPluginManager.getGrailsPlugin(AbstractGrailsPluginManager.java:185)[grails-core-1.3.7.jar:1.3.7]
    3. org.codehaus.groovy.grails.plugins.DefaultGrailsPluginManager.hasGrailsPlugin(DefaultGrailsPluginManager.java:627)[grails-core-1.3.7.jar:1.3.7]
    4. org.codehaus.groovy.grails.plugins.DefaultGrailsPluginManager.areDependenciesResolved(DefaultGrailsPluginManager.java:508)[grails-core-1.3.7.jar:1.3.7]
    5. org.codehaus.groovy.grails.plugins.DefaultGrailsPluginManager.attemptPluginLoad(DefaultGrailsPluginManager.java:565)[grails-core-1.3.7.jar:1.3.7]
    6. org.codehaus.groovy.grails.plugins.DefaultGrailsPluginManager.attemptLoadPlugins(DefaultGrailsPluginManager.java:354)[grails-core-1.3.7.jar:1.3.7]
    7. org.codehaus.groovy.grails.plugins.DefaultGrailsPluginManager.loadPlugins(DefaultGrailsPluginManager.java:282)[grails-core-1.3.7.jar:1.3.7]
    8. org.codehaus.groovy.grails.plugins.GrailsPluginManagerFactoryBean.afterPropertiesSet(GrailsPluginManagerFactoryBean.java:105)[grails-core-1.3.7.jar:1.3.7]
    8 frames
  4. Spring Beans
    DefaultListableBeanFactory.preInstantiateSingletons
    1. org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1477)[org.springframework.beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
    2. org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1417)[org.springframework.beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
    3. org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)[org.springframework.beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
    4. org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)[org.springframework.beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
    5. org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)[org.springframework.beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
    6. org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)[org.springframework.beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
    7. org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)[org.springframework.beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
    8. org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)[org.springframework.beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
    9. org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:563)[org.springframework.beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
    9 frames
  5. Spring Context
    AbstractApplicationContext.refresh
    1. org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)[org.springframework.context-3.0.5.RELEASE.jar:3.0.5.RELEASE]
    2. org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)[org.springframework.context-3.0.5.RELEASE.jar:3.0.5.RELEASE]
    2 frames
  6. Spring
    ContextLoader.createWebApplicationContext
    1. org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)[org.springframework.web-3.0.5.RELEASE.jar:3.0.5.RELEASE]
    1 frame
  7. Grails
    GrailsContextLoader.createWebApplicationContext
    1. org.codehaus.groovy.grails.web.context.GrailsContextLoader.createWebApplicationContext(GrailsContextLoader.java:70)[grails-web-1.3.7.jar:1.3.7]
    1 frame
  8. Spring
    ContextLoaderListener.contextInitialized
    1. org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)[org.springframework.web-3.0.5.RELEASE.jar:3.0.5.RELEASE]
    2. org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)[org.springframework.web-3.0.5.RELEASE.jar:3.0.5.RELEASE]
    2 frames
  9. Undertow Servlet
    DeploymentManagerImpl.deploy
    1. io.undertow.servlet.core.ApplicationListeners.contextInitialized(ApplicationListeners.java:173)[undertow-servlet-1.0.10.Final.jar:1.0.10.Final]
    2. io.undertow.servlet.core.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:189)[undertow-servlet-1.0.10.Final.jar:1.0.10.Final]
    2 frames
  10. WildFly: Undertow
    UndertowDeploymentService.start
    1. org.wildfly.extension.undertow.deployment.UndertowDeploymentService.startContext(UndertowDeploymentService.java:86)
    2. org.wildfly.extension.undertow.deployment.UndertowDeploymentService.start(UndertowDeploymentService.java:71)
    2 frames
  11. JBoss Modular Service Container
    ServiceControllerImpl$StartTask.run
    1. org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1948)
    2. org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1881)
    2 frames
  12. Java RT
    Thread.run
    1. java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[rt.jar:1.8.0_05]
    2. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[rt.jar:1.8.0_05]
    3. java.lang.Thread.run(Thread.java:745)[rt.jar:1.8.0_05]
    3 frames