We are in the phase of moving our Wiki content from MediaWiki to XWiki but from one day to the other, the XWiki instance only shows blank pages and the error output below.
Any ideas how to solve this? We have not changed anything in the setup for at least two weeks, so I have not a clue where to start…
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | 2021-09-13 14:42:46,447 [localhost-startStop-1] INFO iPropertiesConfigurationSource - Loading [xwiki.properties] from [file:/usr/local/tomcat/webapps/ROOT/WEB-INF/xwiki.properties]
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | 2021-09-13 14:42:46,562 [localhost-startStop-1] INFO o.x.e.i.ServletEnvironment - Using permanent directory [/usr/local/xwiki/data]
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | 2021-09-13 14:42:51,527 [localhost-startStop-1] INFO o.x.s.s.i.EmbeddedSolr - Starting embedded Solr server...
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | 2021-09-13 14:42:51,527 [localhost-startStop-1] INFO o.x.s.s.i.EmbeddedSolr - Using Solr home directory: [/usr/local/xwiki/data/store/solr]
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | 2021-09-13 14:42:52,206 [localhost-startStop-1] WARN o.e.j.u.s.S.config - Trusting all certificates configured for Client@b234b85[provider=null,keyStore=null,trustStore=null]
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | 2021-09-13 14:42:52,206 [localhost-startStop-1] WARN o.e.j.u.s.S.config - No Client EndPointIdentificationAlgorithm configured for Client@b234b85[provider=null,keyStore=null,trustStore=null]
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | 2021-09-13 14:42:52,323 [localhost-startStop-1] WARN o.e.j.u.s.S.config - Trusting all certificates configured for Client@7454644b[provider=null,keyStore=null,trustStore=null]
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | 2021-09-13 14:42:52,323 [localhost-startStop-1] WARN o.e.j.u.s.S.config - No Client EndPointIdentificationAlgorithm configured for Client@7454644b[provider=null,keyStore=null,trustStore=null]
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | 2021-09-13 14:42:52,343 [localhost-startStop-1] WARN o.a.s.c.CoreContainer - Not all security plugins configured! authentication=disabled authorization=disabled. Solr is only as secure as you make it. Consider configuring authentication/authorization before exposing Solr to users internal or external. See https://s.apache.org/solrsecurity for more info
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | 2021-09-13 14:42:54,822 [localhost-startStop-1] INFO o.x.s.s.i.EmbeddedSolr - Started embedded Solr server.
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | 2021-09-13 14:42:54,938 [Finalizer] ERROR o.a.s.u.SolrIndexWriter - SolrIndexWriter was not closed prior to finalize(), indicates a bug -- POSSIBLE RESOURCE LEAK!!!
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | 2021-09-13 14:42:54,944 [Finalizer] ERROR o.a.s.u.SolrIndexWriter - Error closing IndexWriter
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | org.apache.lucene.store.AlreadyClosedException: this Directory is closed
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.lucene.store.BaseDirectory.ensureOpen(BaseDirectory.java:51)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.lucene.store.FSDirectory.getDirectory(FSDirectory.java:321)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.lucene.util.IOUtils.spins(IOUtils.java:503)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.lucene.index.ConcurrentMergeScheduler.initDynamicDefaults(ConcurrentMergeScheduler.java:412)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.lucene.index.ConcurrentMergeScheduler.merge(ConcurrentMergeScheduler.java:501)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.lucene.index.IndexWriter.waitForMerges(IndexWriter.java:2538)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.lucene.index.IndexWriter.shutdown(IndexWriter.java:1045)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1087)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.solr.update.SolrIndexWriter.close(SolrIndexWriter.java:298)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.solr.update.SolrIndexWriter.finalize(SolrIndexWriter.java:357)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at java.base/java.lang.System$2.invokeFinalize(System.java:2125)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at java.base/java.lang.ref.Finalizer.runFinalizer(Finalizer.java:87)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at java.base/java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:171)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | Suppressed: java.lang.NullPointerException: null
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.lucene.index.IndexWriter.rollbackInternalNoCommit(IndexWriter.java:2326)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.lucene.index.IndexWriter.rollbackInternal(IndexWriter.java:2269)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.lucene.index.IndexWriter.shutdown(IndexWriter.java:1051)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | ... 6 common frames omitted
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | 2021-09-13 14:42:54,966 [localhost-startStop-1] ERROR .o.i.DefaultObservationManager - Failed to lookup listeners
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | org.xwiki.component.manager.ComponentLookupException: Failed to lookup component with type [interface org.xwiki.observation.EventListener] and hint [EventStreamStoreListener]
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.xwiki.component.embed.EmbeddableComponentManager.getInstanceMap(EmbeddableComponentManager.java:245)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.xwiki.component.embed.EmbeddableComponentManager.getInstanceList(EmbeddableComponentManager.java:225)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.xwiki.observation.internal.DefaultObservationManager.initializeListeners(DefaultObservationManager.java:166)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.xwiki.observation.internal.DefaultObservationManager.getListenersByEvent(DefaultObservationManager.java:132)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:283)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.xwiki.component.internal.StackingComponentEventManager.sendEvent(StackingComponentEventManager.java:151)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.xwiki.component.internal.StackingComponentEventManager.flushEvents(StackingComponentEventManager.java:92)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.xwiki.container.servlet.XWikiServletContextListener.contextInitialized(XWikiServletContextListener.java:124)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4763)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5232)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:753)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:727)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:695)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1177)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1925)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | at java.base/java.lang.Thread.run(Thread.java:829)
ecap-wiki_web.1.mnxs3ltuh7g3@pi1085 | Caused by: org.xwiki.component.manager.ComponentLookupException: Failed to lookup component [org.xwiki.eventstream.store.internal.DocumentEventRecorder] identified by type [class org.xwiki.eventstream.store.internal.DocumentEventRecorder] and hint [default]