NPE Error in Extension Manager when installing Analytics Application Pro on Tomcat

[ilieandriuta]

Environment: Windows 11 Pro, Edge 133, using a local instance of XWiki 16.10.3 on PostgreSQL 16, Tomcat 9.0.98, Java 21 (Oracle)

STEPS TO REPRODUCE

1. Go to Administer Wiki > Extensions > Extensions
2. Install Analytics Application Pro 1.2.0

EXPECTED RESULTS

No errors are encountered.

ACTUAL RESULTS

In EM logs, there is the following error displayed:

Cannot invoke "com.xpn.xwiki.objects.BaseObject.getName()" because "object" is null

having the following stacktrace:

class org.xwiki.component.manager.ComponentLookupException: Failed to lookup component [com.xwiki.analytics.internal.AnalyticsApplicationListener] identified by type [interface org.xwiki.observation.EventListener] and hint [AnalyticsApplicationListener] at org.xwiki.component.embed.EmbeddableComponentManager.getInstance(EmbeddableComponentManager.java:332) at org.xwiki.component.embed.EmbeddableComponentManager.getInstance(EmbeddableComponentManager.java:317) at org.xwiki.observation.internal.DefaultObservationManager.onEventListenerComponentAdded(DefaultObservationManager.java:400) at org.xwiki.observation.internal.DefaultObservationManager.onComponentEvent(DefaultObservationManager.java:371) at org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:317) at org.xwiki.component.internal.StackingComponentEventManager.sendEvent(StackingComponentEventManager.java:151) at org.xwiki.component.internal.StackingComponentEventManager.flushEvents(StackingComponentEventManager.java:92) at org.xwiki.extension.jar.internal.handler.JarExtensionHandler.loadComponents(JarExtensionHandler.java:261) at org.xwiki.extension.jar.internal.handler.JarExtensionHandler.install(JarExtensionHandler.java:183) at org.xwiki.extension.handler.internal.DefaultExtensionHandlerManager.install(DefaultExtensionHandlerManager.java:85) at org.xwiki.extension.job.internal.AbstractExtensionJob.installExtension(AbstractExtensionJob.java:330) at org.xwiki.extension.job.internal.AbstractExtensionJob.applyAction(AbstractExtensionJob.java:233) at org.xwiki.extension.job.internal.AbstractExtensionJob.applyActions(AbstractExtensionJob.java:181) at org.xwiki.extension.job.internal.InstallJob.runInternal(InstallJob.java:140) at org.xwiki.job.AbstractJob.runInContext(AbstractJob.java:246) at org.xwiki.job.AbstractJob.run(AbstractJob.java:223) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) at java.base/java.lang.Thread.run(Thread.java:1583) Caused by: class java.lang.NullPointerException: Cannot invoke "com.xpn.xwiki.objects.BaseObject.getName()" because "object" is null at com.xpn.xwiki.plugin.scheduler.SchedulerPlugin.getObjectUniqueId(SchedulerPlugin.java:659) at com.xpn.xwiki.plugin.scheduler.SchedulerPlugin.getJobStatus(SchedulerPlugin.java:356) at wiki:xwiki//com.xwiki.analytics.internal.AnalyticsApplicationListener.scheduleJob(AnalyticsApplicationListener.java:158) at wiki:xwiki//com.xwiki.analytics.internal.AnalyticsApplicationListener.prepareJobs(AnalyticsApplicationListener.java:136) at wiki:xwiki//com.xwiki.analytics.internal.AnalyticsApplicationListener.initialize(AnalyticsApplicationListener.java:101) at org.xwiki.component.embed.InitializableLifecycleHandler.handle(InitializableLifecycleHandler.java:39) at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:550) at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:636) at org.xwiki.component.embed.EmbeddableComponentManager.getInstance(EmbeddableComponentManager.java:329) at org.xwiki.component.embed.EmbeddableComponentManager.getInstance(EmbeddableComponentManager.java:317) at org.xwiki.observation.internal.DefaultObservationManager.onEventListenerComponentAdded(DefaultObservationManager.java:400) at org.xwiki.observation.internal.DefaultObservationManager.onComponentEvent(DefaultObservationManager.java:371) at org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:317) at org.xwiki.component.internal.StackingComponentEventManager.sendEvent(StackingComponentEventManager.java:151) at org.xwiki.component.internal.StackingComponentEventManager.flushEvents(StackingComponentEventManager.java:92) at org.xwiki.extension.jar.internal.handler.JarExtensionHandler.loadComponents(JarExtensionHandler.java:261) at org.xwiki.extension.jar.internal.handler.JarExtensionHandler.install(JarExtensionHandler.java:183) at org.xwiki.extension.handler.internal.DefaultExtensionHandlerManager.install(DefaultExtensionHandlerManager.java:85) at org.xwiki.extension.job.internal.AbstractExtensionJob.installExtension(AbstractExtensionJob.java:330) at org.xwiki.extension.job.internal.AbstractExtensionJob.applyAction(AbstractExtensionJob.java:233) at org.xwiki.extension.job.internal.AbstractExtensionJob.applyActions(AbstractExtensionJob.java:181) at org.xwiki.extension.job.internal.InstallJob.runInternal(InstallJob.java:140) at org.xwiki.job.AbstractJob.runInContext(AbstractJob.java:246) at org.xwiki.job.AbstractJob.run(AbstractJob.java:223) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) at java.base/java.lang.Thread.run(Thread.java:1583)

The error apparently could not be reproduced on XWiki 16.10.3 Jetty/HSQL demo package version.

[ilieandriuta]

Reproduced as well on XWiki 17.4.2. in XWiki logs, there is the following error:

2025-07-25 15:45:59,917 [XWiki Solr index thread] ERROR gesSolrEntityMetadataExtractor - Failed to index the right for document [xwiki:Analytics.Code.AggregateData.LastVisitStorage]
java.lang.NullPointerException: Cannot invoke "String.trim()" because the return value of "com.xpn.xwiki.doc.XWikiDocument.getXClassXML()" is null
        at com.xwiki.admintools.internal.usage.metadataExtractor.EmptyPagesSolrEntityMetadataExtractor.extract(EmptyPagesSolrEntityMetadataExtractor.java:54)
        at com.xwiki.admintools.internal.usage.metadataExtractor.EmptyPagesSolrEntityMetadataExtractor.extract(EmptyPagesSolrEntityMetadataExtractor.java:40)
        at org.xwiki.search.solr.internal.metadata.SolrMetadataExtractorUtils.extract(SolrMetadataExtractorUtils.java:81)
        at org.xwiki.search.solr.internal.metadata.DocumentSolrMetadataExtractor.setFieldsInternal(DocumentSolrMetadataExtractor.java:155)
        at org.xwiki.search.solr.internal.metadata.AbstractSolrMetadataExtractor.getSolrDocument(AbstractSolrMetadataExtractor.java:171)
        at org.xwiki.search.solr.internal.DefaultSolrIndexer.lambda$getSolrDocument$0(DefaultSolrIndexer.java:615)
        at org.xwiki.bridge.internal.DefaultDocumentContextExecutor.call(DefaultDocumentContextExecutor.java:65)
        at org.xwiki.search.solr.internal.DefaultSolrIndexer.getSolrDocument(DefaultSolrIndexer.java:615)
        at org.xwiki.search.solr.internal.DefaultSolrIndexer.processBatch(DefaultSolrIndexer.java:504)
        at org.xwiki.search.solr.internal.DefaultSolrIndexer.run(DefaultSolrIndexer.java:466)
        at java.base/java.lang.Thread.run(Thread.java:1583)