Cannot publish private page to live

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.X
• Fix Version/s: 7.1.10 DXP FP18, 7.1.X
• Component/s: Staging
• Labels:
  • 7.1-blocker
  • QA-AUTOMATION
  • QA-FP
  • liferay-fixpack-dxp-18-7110
• Branch Version/s:
  7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Last Working Version:
  7.1.10 DXP FP17
• Git Pull Request: https://github.com/liferay/liferay-portal-ee/pull/19285
• QA Test Name:
  • LocalFile.PGStaging#PublishPrivatePage
• QA Test Score: 5

Note: Steps must be exactly like in the description, or the issue won't show.

Steps to Reproduce:

1. Add a Site named "test site".
2. Add a public page inside the site named "test page".
3. Go to

   http://localhost:8080/web/test-site/

   .

4. Go to Control Panel -> Sites -> Sites.
5. Go to Product Menu -> Publishing -> Staging.
6. Active local staging with all options checked.
7. Go to

   http://localhost:8080/web/test-site/

   .

8. Click the Staging button on the top middle.
9. Add a private page named "test page 2" on Test Site.
10. Go to

    http://localhost:8080/group/test-site-staging/

    .

11. Check "Ready for Publication", and click Publish to Live button.
12. Switch to Advanced Publication.
13. Check Private Pages for 3 times so both Private Pages and test page 2 are checked.
14. Publish to Live.

Expected result:
Publish successfully.

Actual result:
Publish failed. If you open details, the error shows:

An unexpected error occurred with the publication process. Please check your portal and publishing configuration.
The model.resource.com.liferay.portal.kernel.model.LayoutSet true could not be exported because of the following error: null.

In the console, error shows:

2020-05-06 02:16:56.654 ERROR [liferay/background_task-2][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:180)
        at com.liferay.exportimport.kernel.lar.StagedModelDataHandlerUtil.exportReferenceStagedModel(StagedModelDataHandlerUtil.java:156)
        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:180)
        at com.liferay.exportimport.internal.controller.LayoutExportController.doExport(LayoutExportController.java:331)
        at com.liferay.exportimport.internal.controller.LayoutExportController.export(LayoutExportController.java:123)
        at com.liferay.portlet.exportimport.service.impl.ExportImportLocalServiceImpl.exportLayoutsAsFile(ExportImportLocalServiceImpl.java:66)
        at sun.reflect.GeneratedMethodAccessor2474.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at com.liferay.portal.spring.aop.ServiceBeanMethodInvocation.proceed(ServiceBeanMethodInvocation.java:153)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor._execute(DefaultTransactionExecutor.java:203)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor.execute(DefaultTransactionExecutor.java:94)
        at com.liferay.portal.spring.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
        at com.liferay.portal.spring.aop.ServiceBeanMethodInvocation.proceed(ServiceBeanMethodInvocation.java:130)
        at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableMethodAdvice.java:55)
        at com.liferay.portal.spring.aop.ServiceBeanMethodInvocation.proceed(ServiceBeanMethodInvocation.java:130)
        at com.liferay.portal.spring.aop.ServiceBeanAopProxy.invoke(ServiceBeanAopProxy.java:125)
        at com.sun.proxy.$Proxy95.exportLayoutsAsFile(Unknown Source)
        at com.liferay.exportimport.kernel.service.ExportImportLocalServiceUtil.exportLayoutsAsFile(ExportImportLocalServiceUtil.java:43)
        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:41)
        at com.liferay.portal.background.task.internal.ThreadLocalAwareBackgroundTaskExecutor.execute(ThreadLocalAwareBackgroundTaskExecutor.java:72)
        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.exportimport.internal.staging.LayoutStagingImpl.prepareLayoutStagingHandler(LayoutStagingImpl.java:294)
        at com.liferay.exportimport.kernel.staging.LayoutStagingUtil.prepareLayoutStagingHandler(LayoutStagingUtil.java:73)
        at com.liferay.layout.internal.exportimport.data.handler.StagedLayoutSetStagedModelDataHandler.exportLayouts(StagedLayoutSetStagedModelDataHandler.java:428)
        at com.liferay.layout.internal.exportimport.data.handler.StagedLayoutSetStagedModelDataHandler.doExportStagedModel(StagedLayoutSetStagedModelDataHandler.java:230)
        at com.liferay.layout.internal.exportimport.data.handler.StagedLayoutSetStagedModelDataHandler.doExportStagedModel(StagedLayoutSetStagedModelDataHandler.java:90)
        at com.liferay.exportimport.kernel.lar.BaseStagedModelDataHandler.exportStagedModel(BaseStagedModelDataHandler.java:102)
        ... 35 more