Reindex on Solr fails with "multiple values encountered for non multiValued field configurationModelAttributeName"

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 CE GA1, 7.0.0 DXP SP1
• Fix Version/s: 7.0.1 CE GA2
• Component/s: Search Infrastructure, Search Infrastructure > Solr Connector
• Labels:
  • KNOWNISSUES_DE70
  • ee-7.0.x
• Story Points: 1.25
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/38828

1- Setup Solr 5 with master/7.0: See: https://support-kb.liferay.com/web/knowledge/knowledge-base/-/knowledge_base/article/52685
2- Execute reindex from the Server Administration

Result: reindex generates errors like this:

14:01:00,429 ERROR [liferay/search_writer/SYSTEM_ENGINE-1][SolrUpdateDocumentCommandImpl:111] org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException: Error from server at http://localhost:8983/solr/liferay: ERROR: [doc=com_liferay_configuration_admin_web_portlet_SystemSettingsPortlet_PORTLET_com.liferay.nested.portlets.web.configuration.NestedPortletsPortletInstanceConfiguration] multiple values encountered for non multiValued field configurationModelAttributeName: [Layout template id, Layout templates unsupported]
org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException: Error from server at http://localhost:8983/solr/liferay: ERROR: [doc=com_liferay_configuration_admin_web_portlet_SystemSettingsPortlet_PORTLET_com.liferay.nested.portlets.web.configuration.NestedPortletsPortletInstanceConfiguration] multiple values encountered for non multiValued field configurationModelAttributeName: [Layout template id, Layout templates unsupported]
	at org.apache.solr.client.solrj.impl.HttpSolrClient.executeMethod(HttpSolrClient.java:560)
	at org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:235)
	at org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:227)
	at org.apache.solr.client.solrj.impl.LBHttpSolrClient.request(LBHttpSolrClient.java:526)
	at com.liferay.portal.search.solr.internal.connection.ReadWriteSolrClient.request(ReadWriteSolrClient.java:59)
	at org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:135)
	at org.apache.solr.client.solrj.SolrClient.add(SolrClient.java:107)
	at org.apache.solr.client.solrj.SolrClient.add(SolrClient.java:72)
	at org.apache.solr.client.solrj.SolrClient.add(SolrClient.java:86)
	at com.liferay.portal.search.solr.internal.SolrUpdateDocumentCommandImpl.doUpdateDocuments(SolrUpdateDocumentCommandImpl.java:100)
	at com.liferay.portal.search.solr.internal.SolrUpdateDocumentCommandImpl.updateDocument(SolrUpdateDocumentCommandImpl.java:52)
	at com.liferay.portal.search.solr.internal.SolrIndexWriter.updateDocument(SolrIndexWriter.java:198)
	at sun.reflect.GeneratedMethodAccessor249.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at com.liferay.portal.kernel.messaging.proxy.ProxyRequest.execute(ProxyRequest.java:86)
	at com.liferay.portal.kernel.messaging.proxy.ProxyMessageListener.receive(ProxyMessageListener.java:54)
	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:756)
	at com.liferay.portal.kernel.concurrent.ThreadPoolExecutor$WorkerTask.run(ThreadPoolExecutor.java:667)
	at java.lang.Thread.run(Thread.java:745)

---

Note
As I mentioned in the KB-article, adding attribute multiValued="true" to field configurationModelAttributeName solves the issue:

schema.xml

<field indexed="true" name="configurationModelAttributeName" multiValued="true" stored="true" type="string" />