스택트레이스(Stack Trace)

스택트레이스란 프로그램이 시작도니 시점부터 현재 위치까지의 메서드 호출목록을 뜻한다.

쉽게말해서...요거다..

java.lang.reflect.InvocationTargetException
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at com.mylibrary.ap.xul.builder.handler.MethodCallback.invokeCallback(MethodCallback.java:32)
     at com.mylibrary.ap.xul.builder.handler.ViewHandler.invokeActionResult(ViewHandler.java:581)
     at com.mylibrary.ap.xul.context.impl.ViewContextImpl$2.onActionResult(ViewContextImpl.java:283)
     at com.mylibrary.ap.xul.context.impl.ActionContextImpl.setResult(ActionContextImpl.java:90)
     at com.mylibrary.ap.xul.action.stock.DialogAction.handleDialogClose(DialogAction.java:156)
     at com.mylibrary.ap.xul.action.stock.DialogAction$1.windowClosed(DialogAction.java:142)
     at com.mylibrary.api.Window.fireWindowClosedEvent(Unknown Source)
     at com.mylibrary.api.Window.onClose(Unknown Source)
     at com.mylibrary.api.platform.WindowBase.BaseClose(Native Method)
     at com.mylibrary.api.platform.WindowBase.BaseClose(Unknown Source)
     at com.mylibrary.api.Window.close(Unknown Source)
     at com.mylibrary.ap.xul.ui.MessageDialog.handleButtonClick(MessageDialog.java:145)
     at com.mylibrary.ap.xul.ui.MessageDialog$1.handleClick(MessageDialog.java:134)
     at com.mylibrary.api.ClickableSupport.fireClickEvent(Unknown Source)
     at com.mylibrary.api.ClickableSupport.handleAction(Unknown Source)
     at com.mylibrary.api.Button.actionHook(Unknown Source)
     at com.mylibrary.api.Component.action(Unknown Source)
Caused by: java.lang.NullPointerException
     at com.mycompany.service.impl.PortalManagerImpl.deleteMenuItem(PortalManagerImpl.java:603)
     at com.mycompany.service.impl.PortalManagerImpl.deletePortal(PortalManagerImpl.java:358)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
     at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
     at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
     at org.springframework.security.intercept.method.aopalliance.MethodSecurityInterceptor.invoke(MethodSecurityInterceptor.java:66)
     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
     at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
     at $Proxy54.deletePortal(Unknown Source)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at com.mycompany.util.SpringSecurityContextInvocationHandler.invoke(SpringSecurityContextInvocationHandler.java:62)
     at $Proxy84.deletePortal(Unknown Source)
     at com.mycompany.ui.binding.PortalDataProvider.doDelete(PortalDataProvider.java:81)
     at com.mycompany.ui.binding.PortalDataProvider.doDelete(PortalDataProvider.java:12)
     at com.mycompany.ui.binding.AbstractEISDataProvider.delete(AbstractEISDataProvider.java:105)
     at com.mylibrary.ap.xul.binding.dataset.impl.DatasetImpl.doCommit(DatasetImpl.java:90)
     at com.mylibrary.ap.xul.binding.dataset.impl.AbstractDataset.commit(AbstractDataset.java:251)
     at com.mylibrary.ap.xul.binding.dataset.impl.AbstractDataset.deleteRow(AbstractDataset.java:201)
     at com.mylibrary.ap.xul.action.dataset.DeleteDataRowAction.execute(DeleteDataRowAction.java:22)
     at com.mylibrary.ap.xul.context.impl.ViewContextImpl.execute(ViewContextImpl.java:294)
     at com.mycompany.ui.portal.PortalInfoHandler.onPostConfirmDeleteAction(PortalInfoHandler.java:192)
     ... 21 more

상단 코드에서 유심히 볼건 해당코드로

Caused by: java.lang.NullPointerException
     at com.mycompany.service.impl.PortalManagerImpl.deleteMenuItem(PortalManagerImpl.java:603)
     at com.mycompany.service.impl.PortalManagerImpl.deletePortal(PortalManagerImpl.java:358)

603번째줄 또는 358번째 줄에서 에러가 나타나는것을 의미한다

여기서 나타난 에러는 NullPointerException으로 Null값을 가진 객체나 변수를 참조할떄 에러가 나타난다는 의미이다.

if (item == null) {
    throw new NullArgumentException("item");
}

//중간 생략
List<PortalMenu> children = getMenuItems(item.getPortal().getId(), item.getId()); // 603번째 줄

for (PortalMenu child : children) {
    deleteMenuItem(child);
 }

 

출처 : https://jaehoney.tistory.com/51