NullPointerException thrown when enabling staging with a Web Content article referenced from a deleted site

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.0.0 DXP FP66, 7.0.X, 7.1.10 DXP FP5, 7.1.10.1 SP1, 7.1.2 CE GA3, 7.1.X, Master
• Component/s: Staging
• Labels:
  • ee-ts
  • liferay-dxp-70-sp10
  • liferay-dxp-71-sp1
  • liferay-fixpack-de-66-7010
  • liferay-fixpack-dxp-5-7110
• Branch Version/s:
  7.1.x, 7.0.x
• Backported to Branch:
  Committed
• Story Points: 0.25
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/65574

Steps to Reproduce

1. Create two sites, Site A and Site B
2. On Site A create a new Web Content article
3. On Site B add the Web Content Display widget to a page and choose the article created in Site A
4. Delete Site A
5. Enable Local Live Staging for Site B

Expected Results

Staging would be enabled successfully.

Actual Results

The follow exception is thrown and staging is not enabled:

2018-11-30 15:31:54.916 ERROR [liferay/background_task-1][BackgroundTaskMessageListener:173] Unable to execute background task
com.liferay.exportimport.kernel.lar.PortletDataException
	at com.liferay.exportimport.kernel.lar.BaseStagedModelDataHandler.exportStagedModel(BaseStagedModelDataHandler.java:149)
	at com.liferay.exportimport.data.handler.base.BaseStagedModelDataHandler.exportStagedModel(BaseStagedModelDataHandler.java:80)
	at com.liferay.exportimport.kernel.lar.StagedModelDataHandlerUtil.exportStagedModel(StagedModelDataHandlerUtil.java:183)
	at com.liferay.exportimport.kernel.lar.StagedModelDataHandlerUtil.exportReferenceStagedModel(StagedModelDataHandlerUtil.java:159)
	at com.liferay.layout.internal.exportimport.data.handler.StagedLayoutSetStagedModelDataHandler.exportLayouts(StagedLayoutSetStagedModelDataHandler.java:395)
	at com.liferay.layout.internal.exportimport.data.handler.StagedLayoutSetStagedModelDataHandler.doExportStagedModel(StagedLayoutSetStagedModelDataHandler.java:201)
	at com.liferay.layout.internal.exportimport.data.handler.StagedLayoutSetStagedModelDataHandler.doExportStagedModel(StagedLayoutSetStagedModelDataHandler.java:85)
	at com.liferay.exportimport.kernel.lar.BaseStagedModelDataHandler.exportStagedModel(BaseStagedModelDataHandler.java:102)
	at com.liferay.exportimport.data.handler.base.BaseStagedModelDataHandler.exportStagedModel(BaseStagedModelDataHandler.java:80)
	at com.liferay.exportimport.kernel.lar.StagedModelDataHandlerUtil.exportStagedModel(StagedModelDataHandlerUtil.java:183)
	at com.liferay.exportimport.kernel.lar.StagedModelDataHandlerUtil.exportReferenceStagedModel(StagedModelDataHandlerUtil.java:159)
	at com.liferay.site.internal.exportimport.data.handler.StagedGroupStagedModelDataHandler.doExportStagedModel(StagedGroupStagedModelDataHandler.java:242)
	at com.liferay.site.internal.exportimport.data.handler.StagedGroupStagedModelDataHandler.doExportStagedModel(StagedGroupStagedModelDataHandler.java:78)
	at com.liferay.exportimport.kernel.lar.BaseStagedModelDataHandler.exportStagedModel(BaseStagedModelDataHandler.java:102)
	at com.liferay.exportimport.data.handler.base.BaseStagedModelDataHandler.exportStagedModel(BaseStagedModelDataHandler.java:80)
	at com.liferay.exportimport.kernel.lar.StagedModelDataHandlerUtil.exportStagedModel(StagedModelDataHandlerUtil.java:183)
	at com.liferay.exportimport.internal.controller.LayoutExportController.doExport(LayoutExportController.java:334)
	at com.liferay.exportimport.internal.controller.LayoutExportController.export(LayoutExportController.java:126)
	at com.liferay.portlet.exportimport.service.impl.ExportImportLocalServiceImpl.exportLayoutsAsFile(ExportImportLocalServiceImpl.java:66)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.liferay.portal.spring.aop.AopMethod.invoke(AopMethod.java:88)
	at com.liferay.portal.spring.aop.ServiceBeanMethodInvocation.proceed(ServiceBeanMethodInvocation.java:96)
	at com.liferay.portal.spring.transaction.DefaultTransactionExecutor._execute(DefaultTransactionExecutor.java:129)
	at com.liferay.portal.spring.transaction.DefaultTransactionExecutor.execute(DefaultTransactionExecutor.java:52)
	at com.liferay.portal.spring.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:66)
	at com.liferay.portal.spring.aop.ServiceBeanMethodInvocation.proceed(ServiceBeanMethodInvocation.java:93)
	at com.liferay.portal.spring.aop.ServiceBeanAopInvocationHandler.invoke(ServiceBeanAopInvocationHandler.java:45)
	at com.sun.proxy.$Proxy98.exportLayoutsAsFile(Unknown Source)
	at com.liferay.exportimport.kernel.service.ExportImportLocalServiceUtil.exportLayoutsAsFile(ExportImportLocalServiceUtil.java:46)
	at com.liferay.exportimport.internal.background.task.LayoutStagingBackgroundTaskExecutor.execute(LayoutStagingBackgroundTaskExecutor.java:139)
	at com.liferay.portal.background.task.internal.SerialBackgroundTaskExecutor.execute(SerialBackgroundTaskExecutor.java:62)
	at com.liferay.portal.kernel.backgroundtask.DelegatingBackgroundTaskExecutor.execute(DelegatingBackgroundTaskExecutor.java:43)
	at com.liferay.portal.background.task.internal.ThreadLocalAwareBackgroundTaskExecutor.execute(ThreadLocalAwareBackgroundTaskExecutor.java:75)
	at com.liferay.portal.background.task.internal.messaging.BackgroundTaskMessageListener.doReceive(BackgroundTaskMessageListener.java:132)
	at com.liferay.portal.kernel.messaging.BaseMessageListener.receive(BaseMessageListener.java:26)
	at com.liferay.portal.kernel.messaging.InvokerMessageListener.receive(InvokerMessageListener.java:74)
	at com.liferay.portal.kernel.messaging.ParallelDestination$1.run(ParallelDestination.java:52)
	at com.liferay.portal.kernel.concurrent.ThreadPoolExecutor$WorkerTask._runTask(ThreadPoolExecutor.java:752)
	at com.liferay.portal.kernel.concurrent.ThreadPoolExecutor$WorkerTask.run(ThreadPoolExecutor.java:664)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
	at com.liferay.journal.content.web.internal.exportimport.portlet.preferences.processor.JournalContentExportImportPortletPreferencesProcessor.processExportPortletPreferences(JournalContentExportImportPortletPreferencesProcessor.java:138)
	at com.liferay.exportimport.internal.controller.PortletExportControllerImpl.exportPortletPreference(PortletExportControllerImpl.java:1060)
	at com.liferay.exportimport.internal.controller.PortletExportControllerImpl.exportPortletPreferences(PortletExportControllerImpl.java:1157)
	at com.liferay.exportimport.internal.controller.PortletExportControllerImpl.exportPortlet(PortletExportControllerImpl.java:515)
	at com.liferay.layout.admin.web.internal.exportimport.data.handler.LayoutStagedModelDataHandler.exportLayoutPortlets(LayoutStagedModelDataHandler.java:821)
	at com.liferay.layout.admin.web.internal.exportimport.data.handler.LayoutStagedModelDataHandler.doExportStagedModel(LayoutStagedModelDataHandler.java:320)
	at com.liferay.layout.admin.web.internal.exportimport.data.handler.LayoutStagedModelDataHandler.doExportStagedModel(LayoutStagedModelDataHandler.java:129)
	at com.liferay.exportimport.kernel.lar.BaseStagedModelDataHandler.exportStagedModel(BaseStagedModelDataHandler.java:102)
	... 42 more