Page Template merge fails when User is subscribed to Asset Publisher during Asset Publisher Entry Check

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.2.X EE, 7.0.0 M7
• Fix Version/s: 6.2.4 CE GA5, 6.2.X EE, 7.0.0 M7
• Component/s: Site Templates, WCM, WCM > Publication, WCM > Publication > Asset Publisher
• Labels:
  • liferay-fixpack-portal-65-6210
• Branch Version/s:
  6.2.x
• Backported to Branch:
  Committed
• Story Points: 30
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/28576

Page Template merge fails when User is subscribed to Asset Publisher during Asset Publisher Entry Check is performed.

Steps
1. Set the below property portal-ext.properties:

asset.publisher.check.interval=1

2. Open the liferay-portlet.xml file and edit the below lines:

<property-key>asset.publisher.check.interval</property-key>
<time-unit>hour</time-unit>

to

<property-key>asset.publisher.check.interval</property-key>
<time-unit>minute</time-unit>

3. Start Liferay
4. Create a Page Template
5. Add an Asset Publisher to the Page Template
6. Add some content (a web content article or document for example)
7. In the Asset Publisher, navigate to Subscriptions and enable Email Subscriptions
8. Create a Page using the Page Template
9. Subscribe to the Asset Publisher
10. Wait one minute

Expected
No errors are reported in the log.
Actual
The below error is reported in the log:

16:59:57,424 ERROR [liferay/scheduler_dispatch-2][SitesImpl:1637] java.lang.NullPointerException
java.lang.NullPointerException
        at com.liferay.portlet.sites.util.SitesImpl.applyLayoutPrototype(SitesImpl.java:240)
        at com.liferay.portlet.sites.util.SitesImpl.doMergeLayoutPrototypeLayout(SitesImpl.java:1634)
        at com.liferay.portlet.sites.util.SitesImpl.mergeLayoutPrototypeLayout(SitesImpl.java:1169)
        at com.liferay.portlet.sites.util.SitesUtil.mergeLayoutPrototypeLayout(SitesUtil.java:266)
        at com.liferay.portal.service.impl.LayoutLocalServiceVirtualLayoutsAdvice.invoke(LayoutLocalServiceVirtualLayoutsAdvice.java:102)
        at com.liferay.portal.spring.aop.ServiceBeanMethodInvocation.proceed(ServiceBeanMethodInvocation.java:111)
        at com.liferay.portal.service.impl.LayoutLocalServiceStagingAdvice.invoke(LayoutLocalServiceStagingAdvice.java:141)
        at com.liferay.portal.spring.aop.ServiceBeanMethodInvocation.proceed(ServiceBeanMethodInvocation.java:111)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor.execute(DefaultTransactionExecutor.java:62)
        at com.liferay.portal.spring.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:51)
        at com.liferay.portal.spring.aop.ServiceBeanMethodInvocation.proceed(ServiceBeanMethodInvocation.java:111)
        at com.liferay.portal.spring.aop.ServiceBeanAopProxy.invoke(ServiceBeanAopProxy.java:175)
        at com.sun.proxy.$Proxy34.getLayout(Unknown Source)
        at com.liferay.portal.service.LayoutLocalServiceUtil.getLayout(LayoutLocalServiceUtil.java:230)
        at com.liferay.portlet.assetpublisher.util.AssetPublisherImpl._checkAssetEntries(AssetPublisherImpl.java:1256)
        at com.liferay.portlet.assetpublisher.util.AssetPublisherImpl.access$0(AssetPublisherImpl.java:1251)
        at com.liferay.portlet.assetpublisher.util.AssetPublisherImpl$2.performAction(AssetPublisherImpl.java:318)
        at com.liferay.portal.kernel.dao.orm.BaseActionableDynamicQuery.performActionsInSingleInterval(BaseActionableDynamicQuery.java:324)
        at com.liferay.portal.kernel.dao.orm.BaseActionableDynamicQuery.performActions(BaseActionableDynamicQuery.java:46)
        at com.liferay.portlet.assetpublisher.util.AssetPublisherImpl.checkAssetEntries(AssetPublisherImpl.java:324)
        at com.liferay.portlet.assetpublisher.util.AssetPublisherUtil.checkAssetEntries(AssetPublisherUtil.java:87)
        at com.liferay.portlet.assetpublisher.messaging.CheckAssetEntryMessageListener.doReceive(CheckAssetEntryMessageListener.java:29)
        at com.liferay.portal.kernel.messaging.BaseMessageListener.receive(BaseMessageListener.java:26)
        at sun.reflect.GeneratedMethodAccessor623.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at com.liferay.portal.kernel.bean.ClassLoaderBeanHandler.invoke(ClassLoaderBeanHandler.java:67)
        at com.sun.proxy.$Proxy297.receive(Unknown Source)
        at com.liferay.portal.kernel.scheduler.messaging.SchedulerEventMessageListenerWrapper.receive(SchedulerEventMessageListenerWrapper.java:77)
        at com.liferay.portal.kernel.messaging.InvokerMessageListener.receive(InvokerMessageListener.java:72)
        at com.liferay.portal.kernel.messaging.ParallelDestination$1.run(ParallelDestination.java:71)
        at com.liferay.portal.kernel.concurrent.ThreadPoolExecutor$WorkerTask._runTask(ThreadPoolExecutor.java:682)
        at com.liferay.portal.kernel.concurrent.ThreadPoolExecutor$WorkerTask.run(ThreadPoolExecutor.java:593)
        at java.lang.Thread.run(Unknown Source)