Hi,

We have just upgraded from 7.4 to 8.6. Search indexing is not working now. I have added indexing/distributed/network/host entry to prconfig but didn't work. Alsoi pyindexerstate is "Failed" on pr_sys_statusnodes table. How can we fix this ?

Log output below;

Exception occured while trying to initialize full text search for this node. 
java.lang.IllegalArgumentException: [cluster.name] must not be empty 
	at org.elasticsearch.cluster.ClusterName.lambda$static$0(ClusterName.java:35) ~[elasticsearch-5.6.9.jar:?] 
	at org.elasticsearch.common.settings.Setting.get(Setting.java:330) ~[elasticsearch-5.6.9.jar:?] 
	at org.elasticsearch.env.Environment.<init>(Environment.java:141) ~[elasticsearch-5.6.9.jar:?] 
	at org.elasticsearch.env.Environment.<init>(Environment.java:118) ~[elasticsearch-5.6.9.jar:?] 
	at com.pega.platform.search.internal.ESSearchProviderEmbedded$ESNode.<init>(ESSearchProviderEmbedded.java:241) ~[search.jar:?] 
	at com.pega.platform.search.internal.ESSearchProviderEmbedded.getESNode(ESSearchProviderEmbedded.java:260) ~[search.jar:?] 
	at com.pega.platform.search.internal.ESSearchProviderEmbedded.invokeES(ESSearchProviderEmbedded.java:247) ~[search.jar:?] 
	at com.pega.platform.search.internal.ESSearchProviderEmbedded.initializeElasticSearchNode(ESSearchProviderEmbedded.java:213) ~[search.jar:?] 
	at com.pega.platform.search.internal.ESSearchProviderEmbedded.startSearch(ESSearchProviderEmbedded.java:90) ~[search.jar:?] 
	at com.pega.platform.search.searchmanager.internal.AbstractSearchManager.startSearch(AbstractSearchManager.java:38) ~[search.jar:?] 
	at com.pega.platform.pegasearch.searchmanager.internal.PegaSearchProviderImpl._initializeFTS(PegaSearchProviderImpl.java:422) ~[pegasearch.jar:?] 
	at com.pega.platform.pegasearch.searchmanager.internal.PegaSearchProviderImpl.reInitializeESNode(PegaSearchProviderImpl.java:642) ~[pegasearch.jar:?] 
	at com.pega.platform.pegasearch.searchmanager.internal.PegaSearchProviderImpl.reinitializeFTS(PegaSearchProviderImpl.java:590) ~[pegasearch.jar:?] 
	at com.pega.platform.pegasearch.searchmanager.internal.PegaSearchProviderImpl.reinitializeFTS(PegaSearchProviderImpl.java:714) ~[pegasearch.jar:?] 
	at com.pega.platform.pegasearch.searchmanager.internal.PegaSearchProviderImpl.configureNodeWithSettings(PegaSearchProviderImpl.java:1021) ~[pegasearch.jar:?] 
	at com.pega.platform.pegasearch.searchmanager.internal.PegaSearchProviderImpl.configureNodesWithSettings(PegaSearchProviderImpl.java:966) ~[pegasearch.jar:?] 
	at com.pega.platform.pegasearch.searchmanager.internal.PegaSearchProviderImpl.configureNodes(PegaSearchProviderImpl.java:931) ~[pegasearch.jar:?] 
	at com.pega.platform.pegasearch.searchmanager.internal.PegaSearchProviderSelector.configureNodes(PegaSearchProviderSelector.java:80) ~[pegasearch.jar:?] 
	at com.pega.platform.pegasearch.searchmanager.internal.PegaSearchManagerImpl.configureNodes(PegaSearchManagerImpl.java:162) ~[pegasearch.jar:?] 
	at com.pega.pegarules.search.internal.es.FTSClusterAdmin.configureNodes(FTSClusterAdmin.java:79) ~[prprivate-search.jar:?] 
	at com.pegarules.generated.activity.ra_action_pzlpftsmanagersavedetails_cc162d10faa2ea7102e6c55c4deff956.step2_circum0(ra_action_pzlpftsmanagersavedetails_cc162d10faa2ea7102e6c55c4deff956.java:298) ~[?:?] 
	at com.pegarules.generated.activity.ra_action_pzlpftsmanagersavedetails_cc162d10faa2ea7102e6c55c4deff956.perform(ra_action_pzlpftsmanagersavedetails_cc162d10faa2ea7102e6c55c4deff956.java:93) ~[?:?] 
	at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:2850) ~[prprivate-session.jar:?] 
	at com.pega.pegarules.session.internal.mgmt.Executable.invokeActivity(Executable.java:11439) ~[prprivate-session.jar:?] 
	at com.pegarules.generated.activity.ra_action_pzlpsearchmanagersavedetailswrapperactivity_b53f47a2c0766df96372dbecb948cb0e.step2_circum0(ra_action_pzlpsearchmanagersavedetailswrapperactivity_b53f47a2c0766df96372dbecb948cb0e.java:177) ~[?:?] 
	at com.pegarules.generated.activity.ra_action_pzlpsearchmanagersavedetailswrapperactivity_b53f47a2c0766df96372dbecb948cb0e.perform(ra_action_pzlpsearchmanagersavedetailswrapperactivity_b53f47a2c0766df96372dbecb948cb0e.java:76) ~[?:?] 
	at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:2850) ~[prprivate-session.jar:?] 
	at com.pegarules.generated.callActivity_080101_2223927609556540475.callActivity08_01_01(callActivity_080101_2223927609556540475.java:134) ~[?:?] 
	at com.pegarules.generated.callActivity_080101_2223927609556540475.invoke(callActivity_080101_2223927609556540475.java:81) ~[?:?] 
	at com.pega.pegarules.generation.internal.library.LibraryRuntime.resolveAndinvokeFunctionViaReflection(LibraryRuntime.java:232) ~[prprivate-generation.jar:?] 
	at com.pega.pegarules.generation.internal.library.LibraryRuntime.invokeLibraryRuntime(LibraryRuntime.java:123) ~[prprivate-generation.jar:?] 
	at com.pega.pegarules.session.internal.mgmt.Executable.invokeLibraryRuntime(Executable.java:9752) ~[prprivate-session.jar:?] 
	at com.pega.pegarules.priv.generator.LibrarySupport.resolveAndInvokeFunctionViaReflectionWithException(LibrarySupport.java:277) ~[prpublic.jar:?] 
	at com.pegarules.generated.flowaction.ra_action_pzlplucenelanding_bafb894a71ee9528a5c6bd81d3394a8e.RunFlowActionActivity_circum0(ra_action_pzlplucenelanding_bafb894a71ee9528a5c6bd81d3394a8e.java:415) ~[?:?] 
	at com.pegarules.generated.flowaction.ra_action_pzlplucenelanding_bafb894a71ee9528a5c6bd81d3394a8e.perform(ra_action_pzlplucenelanding_bafb894a71ee9528a5c6bd81d3394a8e.java:79) ~[?:?] 
	at com.pega.pegarules.session.internal.mgmt.Executable.doAction(Executable.java:2314) ~[prprivate-session.jar:?] 
	at com.pega.pegarules.session.internal.mgmt.Executable.doAction(Executable.java:2215) ~[prprivate-session.jar:?] 
	at com.pegarules.generated.activity.ra_action_pxperformflowaction_f4eb8d1c39231974219953abb40b017f.step7_circum0(ra_action_pxperformflowaction_f4eb8d1c39231974219953abb40b017f.java:974) ~[?:?] 
	at com.pegarules.generated.activity.ra_action_pxperformflowaction_f4eb8d1c39231974219953abb40b017f.perform(ra_action_pxperformflowaction_f4eb8d1c39231974219953abb40b017f.java:206) ~[?:?] 
	at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:2850) ~[prprivate-session.jar:?] 
	at com.pega.pegarules.session.internal.mgmt.Executable.invokeActivity(Executable.java:11439) ~[prprivate-session.jar:?] 
	at com.pegarules.generated.activity.ra_action_pxlocalactionsubmit_4d9f5380ac69b69118d97b265660027c.step2_circum0(ra_action_pxlocalactionsubmit_4d9f5380ac69b69118d97b265660027c.java:267) ~[?:?] 
	at com.pegarules.generated.activity.ra_action_pxlocalactionsubmit_4d9f5380ac69b69118d97b265660027c.perform(ra_action_pxlocalactionsubmit_4d9f5380ac69b69118d97b265660027c.java:93) ~[?:?] 
	at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:2850) ~[prprivate-session.jar:?] 
	at com.pegarules.generated.activity.ra_action_reloadsection_7f53f19b731fce78e8e1eb73e3ab4889.step6_circum0(ra_action_reloadsection_7f53f19b731fce78e8e1eb73e3ab4889.java:1100) ~[?:?] 
	at com.pegarules.generated.activity.ra_action_reloadsection_7f53f19b731fce78e8e1eb73e3ab4889.perform(ra_action_reloadsection_7f53f19b731fce78e8e1eb73e3ab4889.java:161) ~[?:?] 
	at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:2850) ~[prprivate-session.jar:?] 
	at com.pega.pegarules.session.internal.mgmt.base.ThreadRunner.runActivitiesAlt(ThreadRunner.java:653) ~[prprivate-session.jar:?] 
	at com.pega.pegarules.session.internal.mgmt.PRThreadImpl.runActivitiesAlt(PRThreadImpl.java:519) ~[prprivate-session.jar:?] 
	at com.pega.pegarules.session.internal.engineinterface.service.HttpAPI.runActivities(HttpAPI.java:4303) ~[prprivate-session.jar:?] 
	at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequestInner(EngineAPI.java:445) ~[prenginext.jar:?] 
	at sun.reflect.GeneratedMethodAccessor204.invoke(Unknown Source) ~[?:?] 
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_292] 
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_292] 
	at com.pega.pegarules.session.internal.PRSessionProviderImpl.performTargetActionWithLock(PRSessionProviderImpl.java:1391) ~[prprivate-session.jar:?] 
	at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:1123) ~[prprivate-session.jar:?] 
	at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:977) ~[prprivate-session.jar:?] 
	at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequest(EngineAPI.java:368) ~[prenginext.jar:?] 
	at com.pega.pegarules.session.internal.engineinterface.service.HttpAPI.invoke(HttpAPI.java:930) ~[prprivate-session.jar:?] 
	at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl._invokeEngine_privact(EngineImpl.java:338) ~[prprivate-session.jar:?] 
	at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.invokeEngine(EngineImpl.java:282) ~[prprivate-session.jar:?] 
	at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.invokeEngine(EngineImpl.java:259) ~[prprivate-session.jar:?] 
	at com.pega.pegarules.priv.context.JNDIEnvironment.invokeEngineInner(JNDIEnvironment.java:281) ~[prpublic.jar:?] 
	at com.pega.pegarules.priv.context.JNDIEnvironment.invokeEngine(JNDIEnvironment.java:226) ~[prpublic.jar:?] 
	at com.pega.pegarules.web.impl.WebStandardImpl.invokeEngine(WebStandardImpl.java:837) ~[prwebj2ee.jar:?] 
	at com.pega.pegarules.web.impl.WebStandardImpl.makeEtierRequest(WebStandardImpl.java:797) ~[prwebj2ee.jar:?] 
	at com.pega.pegarules.web.impl.WebStandardImpl.doPostInner(WebStandardImpl.java:420) ~[prwebj2ee.jar:?] 
	at sun.reflect.GeneratedMethodAccessor203.invoke(Unknown Source) ~[?:?] 
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_292] 
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_292] 
	at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethod(PRBootstrap.java:388) ~[prbootstrap-8.6.0-101.jar:8.6.0-101] 
	at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethodPropagatingThrowable(PRBootstrap.java:430) ~[prbootstrap-8.6.0-101.jar:8.6.0-101] 
	at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethodPropagatingThrowable(AppServerBridgeToPega.java:225) ~[prbootstrap-api-8.6.0-101.jar:8.6.0-101] 
	at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethod(AppServerBridgeToPega.java:274) ~[prbootstrap-api-8.6.0-101.jar:8.6.0-101] 
	at com.pega.pegarules.internal.web.servlet.WebStandardBoot.doPost(WebStandardBoot.java:164) ~[prbootstrap-api-8.6.0-101.jar:8.6.0-101] 
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:681) ~[servlet-api.jar:4.0.FR] 
	at com.pega.pegarules.internal.web.servlet.WebStandardBoot.service(WebStandardBoot.java:191) ~[prbootstrap-api-8.6.0-101.jar:8.6.0-101] 
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[servlet-api.jar:4.0.FR] 
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:228) ~[catalina.jar:9.0.48] 
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[catalina.jar:9.0.48] 
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-websocket.jar:9.0.48] 
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[catalina.jar:9.0.48] 
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[catalina.jar:9.0.48] 
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[catalina.jar:9.0.48] 
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[catalina.jar:9.0.48] 
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[catalina.jar:9.0.48] 
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[catalina.jar:9.0.48] 
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[catalina.jar:9.0.48] 
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687) ~[catalina.jar:9.0.48] 
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[catalina.jar:9.0.48] 
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[catalina.jar:9.0.48] 
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-coyote.jar:9.0.48] 
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-coyote.jar:9.0.48] 
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-coyote.jar:9.0.48] 
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1723) ~[tomcat-coyote.jar:9.0.48] 
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-coyote.jar:9.0.48] 
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_292] 
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_292] 
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-util.jar:9.0.48] 
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_292]