Thanks for the additional details Matthew. I created this JIRA to track
this problem: https://issues.apache.org/jira/browse/SOLR-15145. Please add
any additional information to that ticket if needed.

Are you able to upgrade your SolrJ client JAR to 8.8.0? If not, I
understand but that would be a quick work-around for this problem if
possible in your env. Otherwise, we'll have to include a fix into 8.8.1

Cheers,
Tim

On Mon, Feb 8, 2021 at 8:27 AM Timothy Potter <thelabd...@gmail.com> wrote:

> What version of SolrJ is embedded in your uleaf.ear file? There have been
> changes in how we deal with URLs stored in ZK in 8.8 --> SOLR-12182
>
> On Fri, Feb 5, 2021 at 2:34 AM Flowerday, Matthew J <
> matthew.flower...@gb.unisys.com> wrote:
>
>> Hi There
>>
>>
>>
>> I have been checking out the latest (8.8.0) SolrCloud database (using
>> Zookeeper 3.6.2) against our application which talks to Solr via the Solr
>> API (I am not too sure of the details as I am not a java developer
>> unfortunately!). The software has Solr 8.7.0/ZooKeeper 3.6.2 libraries
>> ‘embedded’.
>>
>>
>>
>> When our application sends a query to the SolrCloud 8.8.0 database it
>> generates this error:
>>
>>
>>
>> 2021-02-05 05:36:42,644 INFO
>> [org.apache.solr.common.cloud.ConnectionManager] (default task-7) Client is
>> connected to ZooKeeper
>>
>> 2021-02-05 05:36:42,685 INFO
>> [org.apache.solr.common.cloud.ZkStateReader] (default task-7) Updated live
>> nodes from ZooKeeper... (0) -> (1)
>>
>> 2021-02-05 05:36:42,752 INFO
>> [org.apache.solr.client.solrj.impl.ZkClientClusterStateProvider] (default
>> task-7) Cluster at localhost:2185 ready
>>
>> 2021-02-05 05:36:42,785 INFO
>> [org.apache.solr.client.solrj.impl.BaseCloudSolrClient] (default task-7)
>> request was not communication error it seems
>>
>> 2021-02-05 05:36:42,788 INFO
>> [org.apache.solr.client.solrj.impl.BaseCloudSolrClient] (default task-7)
>> Request to collection [holmes] failed due to (0)
>> java.lang.NullPointerException, retry=0 maxRetries=5 commError=false
>> errorCode=0
>>
>> 2021-02-05 05:36:42,789 ERROR
>> [com.unisys.holmes2.h2ng.solr.business.impl.SolrConnectionManagerImpl]
>> (default task-7) Solr exception on query 'test':
>> org.apache.solr.client.solrj.SolrServerException:
>> java.lang.NullPointerException
>>
>>               at
>> deployment.uleaf.ear//org.apache.solr.client.solrj.impl.BaseCloudSolrClient.requestWithRetryOnStaleState(BaseCloudSolrClient.java:1053)
>>
>>               at
>> deployment.uleaf.ear//org.apache.solr.client.solrj.impl.BaseCloudSolrClient.request(BaseCloudSolrClient.java:866)
>>
>>               at
>> deployment.uleaf.ear//org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:214)
>>
>>               at
>> deployment.uleaf.ear//org.apache.solr.client.solrj.SolrClient.query(SolrClient.java:1003)
>>
>>               at
>> deployment.uleaf.ear//org.apache.solr.client.solrj.SolrClient.query(SolrClient.java:1018)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.holmes2.h2ng.solr.business.impl.SolrConnectionManagerImpl.search(SolrConnectionManagerImpl.java:191)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.holmes2.h2ng.solr.business.impl.SolrSearchServiceImpl.search(SolrSearchServiceImpl.java:223)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.holmes2.h2ng.solr.business.impl.SolrSearchServiceImpl.retrieveSearchPages(SolrSearchServiceImpl.java:163)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.holmes2.h2ng.solr.business.impl.SolrSearchServiceImpl.retrieveResults(SolrSearchServiceImpl.java:147)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.holmes2.h2ng.solr.business.impl.SolrSearchServiceImpl.search(SolrSearchServiceImpl.java:132)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.holmes2.h2ng.solr.business.impl.SolrSearchServiceImpl.search(SolrSearchServiceImpl.java:118)
>>
>>               at
>> deployment.uleaf.ear.solr-ui-2.0-SNAPSHOT.war//com.unisys.holmes2.h2ng.solr.presentation.SolrController.search(SolrController.java:163)
>>
>>               at
>> deployment.uleaf.ear.solr-ui-2.0-SNAPSHOT.war//com.unisys.holmes2.h2ng.solr.presentation.SolrController.searchValid(SolrController.java:127)
>>
>>               at
>> deployment.uleaf.ear.solr-ui-2.0-SNAPSHOT.war//com.unisys.holmes2.h2ng.solr.presentation.SolrController.search(SolrController.java:108)
>>
>>               at
>> deployment.uleaf.ear.solr-ui-2.0-SNAPSHOT.war//com.unisys.holmes2.h2ng.solr.presentation.SolrController$$FastClassBySpringCGLIB$$82e1da1b.invoke(<generated>)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:708)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.holmes2.h2ng.persistence.support.AbstractRequestLogger.proceedWithoutDebug(AbstractRequestLogger.java:60)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.holmes2.h2ng.persistence.support.AbstractRequestLogger.logAndInvoke(AbstractRequestLogger.java:36)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.holmes2.h2ng.presentation.support.RequestLogger.request(RequestLogger.java:48)
>>
>>               at
>> jdk.internal.reflect.GeneratedMethodAccessor733.invoke(Unknown Source)
>>
>>               at
>> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>
>>               at
>> java.base/java.lang.reflect.Method.invoke(Method.java:566)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:68)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:168)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:644)
>>
>>               at
>> deployment.uleaf.ear.solr-ui-2.0-SNAPSHOT.war//com.unisys.holmes2.h2ng.solr.presentation.SolrController$$EnhancerBySpringCGLIB$$8bd8fe86.search(<generated>)
>>
>>               at
>> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
>> Method)
>>
>>               at
>> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>>
>>               at
>> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>
>>               at
>> java.base/java.lang.reflect.Method.invoke(Method.java:566)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.web.portlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:369)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.web.portlet.mvc.annotation.AnnotationMethodHandlerAdapter.doHandle(AnnotationMethodHandlerAdapter.java:356)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.web.portlet.mvc.annotation.AnnotationMethodHandlerAdapter.handleResource(AnnotationMethodHandlerAdapter.java:302)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.web.portlet.DispatcherPortlet.doResourceService(DispatcherPortlet.java:859)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.web.portlet.FrameworkPortlet.processRequest(FrameworkPortlet.java:539)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.web.portlet.FrameworkPortlet.serveResource(FrameworkPortlet.java:490)
>>
>>               at
>> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
>> Method)
>>
>>               at
>> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>>
>>               at
>> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>
>>               at
>> java.base/java.lang.reflect.Method.invoke(Method.java:566)
>>
>>               at
>> deployment.uleaf.ear//org.apache.pluto.container.bean.processor.AnnotatedMethod.invoke(AnnotatedMethod.java:187)
>>
>>               at
>> deployment.uleaf.ear//org.apache.pluto.container.bean.processor.PortletInvoker.invokePortletMethod(PortletInvoker.java:137)
>>
>>               at
>> deployment.uleaf.ear//org.apache.pluto.container.bean.processor.PortletInvoker.serveResource(PortletInvoker.java:285)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.uleaf.portal.service.FilterChainImpl.doFilter(FilterChainImpl.java:295)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.uleaf.portal.service.FilterChainImpl.processFilter(FilterChainImpl.java:154)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.uleaf.portal.service.FilterManagerImpl.processFilter(FilterManagerImpl.java:116)
>>
>>               at
>> deployment.uleaf.ear//org.apache.pluto.container.driver.PortletServlet3.dispatch(PortletServlet3.java:510)
>>
>>               at
>> deployment.uleaf.ear//org.apache.pluto.container.driver.PortletServlet3.doGet(PortletServlet3.java:333)
>>
>>               at javax.servlet.api@2.0.0.Final
>> //javax.servlet.http.HttpServlet.service(HttpServlet.java:503)
>>
>>               at javax.servlet.api@2.0.0.Final
>> //javax.servlet.http.HttpServlet.service(HttpServlet.java:590)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.server.handlers.MetricsHandler.handleRequest(MetricsHandler.java:64)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.core.MetricsChainHandler.handleRequest(MetricsChainHandler.java:59)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:251)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.ServletInitialHandler.dispatchToPath(ServletInitialHandler.java:186)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.spec.RequestDispatcherImpl.forwardImpl(RequestDispatcherImpl.java:227)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.spec.RequestDispatcherImpl.access$100(RequestDispatcherImpl.java:54)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.spec.RequestDispatcherImpl$2.call(RequestDispatcherImpl.java:137)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.spec.RequestDispatcherImpl$2.call(RequestDispatcherImpl.java:134)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.spec.ServletContextImpl$5.call(ServletContextImpl.java:202)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.spec.ServletContextImpl$5.call(ServletContextImpl.java:199)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
>>
>>               at org.wildfly.extension.undertow@18.0.1.Final
>> //org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
>>
>>               at org.wildfly.extension.undertow@18.0.1.Final
>> //org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
>>
>>               at org.wildfly.extension.undertow@18.0.1.Final
>> //org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
>>
>>               at org.wildfly.extension.undertow@18.0.1.Final
>> //org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
>>
>>               at org.wildfly.extension.undertow@18.0.1.Final
>> //org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.spec.ServletContextImpl.invokeAction(ServletContextImpl.java:1022)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.spec.RequestDispatcherImpl.forwardImplSetup(RequestDispatcherImpl.java:134)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.spec.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:111)
>>
>>               at
>> deployment.uleaf.ear//org.apache.pluto.driver.container.DefaultPortletInvokerService.invoke(DefaultPortletInvokerService.java:243)
>>
>>               at
>> deployment.uleaf.ear//org.apache.pluto.driver.container.DefaultPortletInvokerService.serveResource(DefaultPortletInvokerService.java:162)
>>
>>               at
>> deployment.uleaf.ear//org.apache.pluto.container.impl.PortletContainerImpl.doServeResource(PortletContainerImpl.java:275)
>>
>>               at
>> deployment.uleaf.ear.portal-ui.war//com.unisys.holmes2.h2ng.portal.presentation.AbstractPortalWebProcessor$UrlAction$5.handleRequest(AbstractPortalWebProcessor.java:347)
>>
>>               at
>> deployment.uleaf.ear.portal-ui.war//com.unisys.holmes2.h2ng.portal.presentation.AbstractPortalWebProcessor.handleRequest(AbstractPortalWebProcessor.java:435)
>>
>>               at
>> deployment.uleaf.ear.portal-ui.war//com.unisys.holmes2.h2ng.portal.presentation.PortalServlet.processPageWithValidSession(PortalServlet.java:233)
>>
>>               at
>> deployment.uleaf.ear.portal-ui.war//com.unisys.holmes2.h2ng.portal.presentation.PortalServlet.processPage(PortalServlet.java:215)
>>
>>               at
>> deployment.uleaf.ear.portal-ui.war//com.unisys.holmes2.h2ng.portal.presentation.PortalServlet.processHttpRequest(PortalServlet.java:144)
>>
>>               at
>> deployment.uleaf.ear.portal-ui.war//com.unisys.holmes2.h2ng.portal.presentation.PortalServlet.service(PortalServlet.java:102)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
>>
>>               at
>> deployment.uleaf.ear.portal-ui.war//com.unisys.holmes2.h2ng.portal.presentation.PortalFaultyMultipartFilter.doFilter(PortalFaultyMultipartFilter.java:83)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.holmes2.h2ng.presentation.filter.SessionValidationFilter.doFilter(SessionValidationFilter.java:80)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.holmes2.h2ng.presentation.filter.LoggingFilter.doFilter(LoggingFilter.java:149)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.holmes2.h2ng.presentation.filter.SpaceRemovingFilter.doFilter(SpaceRemovingFilter.java:214)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
>>
>>               at
>> deployment.uleaf.ear//org.owasp.csrfguard.CsrfGuardFilter.doFilter(CsrfGuardFilter.java:88)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.web.multipart.support.MultipartFilter.doFilterInternal(MultipartFilter.java:118)
>>
>>               at
>> deployment.uleaf.ear//org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
>>
>>               at
>> deployment.uleaf.ear//com.unisys.holmes2.h2ng.presentation.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:21)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
>>
>>               at org.wildfly.extension.undertow@18.0.1.Final
>> //org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
>>
>>               at org.wildfly.extension.undertow@18.0.1.Final
>> //org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
>>
>>               at org.wildfly.extension.undertow@18.0.1.Final
>> //org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.server.handlers.MetricsHandler.handleRequest(MetricsHandler.java:64)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.core.MetricsChainHandler.handleRequest(MetricsChainHandler.java:59)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:269)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
>>
>>               at org.wildfly.extension.undertow@18.0.1.Final
>> //org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
>>
>>               at org.wildfly.extension.undertow@18.0.1.Final
>> //org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
>>
>>               at org.wildfly.extension.undertow@18.0.1.Final
>> //org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
>>
>>               at org.wildfly.extension.undertow@18.0.1.Final
>> //org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
>>
>>               at org.wildfly.extension.undertow@18.0.1.Final
>> //org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78)
>>
>>               at io.undertow.servlet@2.0.27.Final
>> //io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:99)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.server.Connectors.executeRootHandler(Connectors.java:376)
>>
>>               at io.undertow.core@2.0.27.Final
>> //io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
>>
>>               at org.jboss.threads@2.3.3.Final
>> //org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
>>
>>               at org.jboss.threads@2.3.3.Final
>> //org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1982)
>>
>>               at org.jboss.threads@2.3.3.Final
>> //org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
>>
>>               at org.jboss.threads@2.3.3.Final
>> //org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
>>
>>               at java.base/java.lang.Thread.run(Thread.java:834)
>>
>> Caused by: java.lang.NullPointerException
>>
>>               at
>> deployment.uleaf.ear//org.apache.solr.common.cloud.ZkCoreNodeProps.getCoreUrl(ZkCoreNodeProps.java:53)
>>
>>               at
>> deployment.uleaf.ear//org.apache.solr.client.solrj.impl.BaseCloudSolrClient.lambda$sendRequest$2(BaseCloudSolrClient.java:1161)
>>
>>               at
>> java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
>>
>>               at
>> deployment.uleaf.ear//org.apache.solr.client.solrj.impl.BaseCloudSolrClient.sendRequest(BaseCloudSolrClient.java:1159)
>>
>>               at
>> deployment.uleaf.ear//org.apache.solr.client.solrj.impl.BaseCloudSolrClient.requestWithRetryOnStaleState(BaseCloudSolrClient.java:934)
>>
>>               ... 166 more
>>
>>
>>
>> If try the same test pointing to a SolrCloud 8.7.0/Zookeeper 3.6.2 all is
>> well and search returns results. I was wondering if there is some
>> additional config required for Solr 8.8.0 to be connected to via ZooKeeper?
>>
>>
>>
>> When I point our application to a Solr 8.8.0 single server (non-cloud) it
>> connects ok and returns results. The issue just seems to be with SolrCloud.
>>
>>
>>
>> Many Thanks
>>
>>
>>
>> Matthew
>>
>>
>>
>> *Matthew Flowerday* | Consultant | ULEAF
>>
>> Unisys | 01908 774830| matthew.flower...@unisys.com
>>
>> Address Enigma | Wavendon Business Park | Wavendon | Milton Keynes |
>> MK17 8LX
>>
>>
>>
>> [image: unisys_logo] <http://www.unisys.com/>
>>
>>
>>
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