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Details

Type: Bug
Resolution: Solved By
Priority: Blocker
Fix Version/s: 17.10.3, 18.1.0-rc-1
Affects Version/s: 17.10.2
Component/s: Administration
Labels:
- regression
Environment:
Windows 11 Pro, Edge 144, using an instance of XWiki 17.10.2 on PostgreSQL 17, Tomcat 10, Docker, Java 21, reproducible also on Jetty/HSQL demo packaging

Difficulty:
Unknown
Documentation:
N/A
Documentation in Release Notes:
N/A
Similar issues:

Description

Steps to reproduce

Login as Admin
Go to Administer Wiki > Content > Localization
Select another Default Language from the drop-down (e.g. FR)
Click 'Save'
Select again EN
Click 'Save' as well
Observe the XWiki logs

Other steps on which the issue was reproduced:

Go to Administer Wiki > Content > Localization
On Multilingual, select 'Yes'
Under Supported Languages, select another language (e.g. FR)
Click 'Save'

Expected results

No errors are displayed in the logs.

Actual results

The following stacktrace is displayed in XWiki console:

2026-01-29 13:27:04,447 [http-nio-8080-exec-3 - http://localhost:1113/bin/saveandcontinue/XWiki/XWikiPreferences] ERROR rIndexAvailableLocalesListener - Failed to handle event [org.xwiki.bridge.event.DocumentUpdatedEvent@bb170136] with source [XWiki.XWikiPreferences]
org.apache.solr.client.solrj.SolrServerException: java.lang.RuntimeException: java.lang.IllegalArgumentException: Invalid locale format: stored,indexed,tokenized,omitNorms,indexOptions=DOCS<doclocale:>
        at org.apache.solr.client.solrj.embedded.EmbeddedSolrServer.request(EmbeddedSolrServer.java:277)
        at org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:234)
        at org.apache.solr.client.solrj.SolrClient.getQueryResponse(SolrClient.java:1010)
        at org.apache.solr.client.solrj.SolrClient.queryAndStreamResponse(SolrClient.java:993)
        at org.apache.solr.client.solrj.SolrClient.queryAndStreamResponse(SolrClient.java:1031)
        at org.xwiki.search.solr.internal.AbstractSolrInstance.queryAndStreamResponse(AbstractSolrInstance.java:134)
        at org.xwiki.search.solr.internal.SolrIndexAvailableLocalesListener.onEvent(SolrIndexAvailableLocalesListener.java:182)
        at org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:338)
        at org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:303)
        at com.xpn.xwiki.XWiki.afterSave(XWiki.java:2009)
        at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:2097)
        at com.xpn.xwiki.web.SaveAction.save(SaveAction.java:309)
        at com.xpn.xwiki.web.SaveAndContinueAction.doWrappedAction(SaveAndContinueAction.java:114)
        at com.xpn.xwiki.web.SaveAndContinueAction.action(SaveAndContinueAction.java:156)
        at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:636)
        at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:339)
        at com.xpn.xwiki.web.LegacyActionServlet.service(LegacyActionServlet.java:111)
        at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)
        at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:123)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:162)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)
        at org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:71)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:162)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:162)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)
        at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:66)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:162)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)
        at org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:135)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:162)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)
        at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:212)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:162)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)
        at org.xwiki.container.servlet.filters.internal.SafeRedirectFilter.doFilter(SafeRedirectFilter.java:106)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:162)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)
        at org.xwiki.container.servlet.filters.internal.ResolveRelativeRedirectFilter.doFilter(ResolveRelativeRedirectFilter.java:129)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:162)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)
        at org.xwiki.container.servlet.filters.internal.SourceURLResolverFilter.doFilter(SourceURLResolverFilter.java:177)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:162)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)
        at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:120)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:162)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:165)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:88)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:113)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:83)
        at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:654)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:72)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:903)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1774)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
        at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:973)
        at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:491)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
        at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.RuntimeException: java.lang.IllegalArgumentException: Invalid locale format: stored,indexed,tokenized,omitNorms,indexOptions=DOCS<doclocale:>
        at org.apache.solr.client.solrj.embedded.EmbeddedSolrServer.request(EmbeddedSolrServer.java:267)
        ... 66 common frames omitted
Caused by: java.lang.IllegalArgumentException: Invalid locale format: stored,indexed,tokenized,omitNorms,indexOptions=DOCS<doclocale:>
        at org.apache.commons.lang3.LocaleUtils.parseLocale(LocaleUtils.java:294)
        at org.apache.commons.lang3.LocaleUtils.toLocale(LocaleUtils.java:376)
        at org.xwiki.search.solr.internal.reference.SolrEntityReferenceResolver.getDocumentReferenceWithLocale(SolrEntityReferenceResolver.java:121)
        at org.xwiki.search.solr.internal.reference.SolrEntityReferenceResolver.getEntityReference(SolrEntityReferenceResolver.java:72)
        at org.xwiki.search.solr.internal.reference.SolrEntityReferenceResolver.resolve(SolrEntityReferenceResolver.java:63)
        at org.xwiki.search.solr.internal.reference.SolrEntityReferenceResolver.resolve(SolrEntityReferenceResolver.java:46)
        at org.xwiki.search.solr.internal.reference.SolrDocumentReferenceResolver.resolve(SolrDocumentReferenceResolver.java:48)
        at org.xwiki.search.solr.internal.reference.SolrDocumentReferenceResolver.resolve(SolrDocumentReferenceResolver.java:38)
        at org.xwiki.search.solr.internal.SolrIndexAvailableLocalesListener$1.streamSolrDocument(SolrIndexAvailableLocalesListener.java:173)
        at org.apache.solr.client.solrj.embedded.EmbeddedSolrServer$4.writeSolrDocument(EmbeddedSolrServer.java:333)
        at org.apache.solr.response.BinaryResponseWriter$Resolver.writeResultsBody(BinaryResponseWriter.java:143)
        at org.apache.solr.client.solrj.embedded.EmbeddedSolrServer$1.writeResults(EmbeddedSolrServer.java:245)
        at org.apache.solr.response.BinaryResponseWriter$Resolver.resolve(BinaryResponseWriter.java:100)
        at org.apache.solr.common.util.JavaBinCodec.writeVal(JavaBinCodec.java:267)
        at org.apache.solr.common.util.JavaBinCodec.writeNamedList(JavaBinCodec.java:252)
        at org.apache.solr.common.util.JavaBinCodec.writeKnownType(JavaBinCodec.java:360)
        at org.apache.solr.common.util.JavaBinCodec.writeVal(JavaBinCodec.java:257)
        at org.apache.solr.common.util.JavaBinCodec.marshal(JavaBinCodec.java:167)
        at org.apache.solr.client.solrj.embedded.EmbeddedSolrServer.request(EmbeddedSolrServer.java:257)
        ... 66 common frames omitted

The issue doesn't seem to reproduce on XWiki 16.10.16 or 17.4.8.

"Failed to handle event" error in the logs when adding or replacing a language in Administration

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