Java 从LDAP服务器对用户进行身份验证时出现CursOrderApreferralException

代码通过向请求提供LDAP用户名和密码与LDAP服务器交互，从而验证用户是否存在？似乎LDAP服务器正在提供响应，在迭代游标（来自LDAP的响应）时，出现了此问题。请提供一些建议。提前谢谢

String filter = searchFilter.replace(USERNAME_PLACEHOLDER, username);
cursor = connection.search(baseDN, filter, SearchScope.ONELEVEL);
Entry entry = cursor.get();   

错误

2020-01-10_17:41:58.461 [XNIO-1 task-1] ERROR o.j.j.r.s.v.d.AuthResource [service=] [rootService=] - Error occurred authenticating appuser
java.lang.RuntimeException: org.apache.directory.api.ldap.model.exception.LdapException: org.apache.directory.api.ldap.model.cursor.CursorLdapReferralException
        at org.jan.jacs2.auth.impl.LDAPAuthProvider.authenticate(LDAPAuthProvider.java:123)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.jboss.weld.bean.proxy.AbstractBeanInstance.invoke(AbstractBeanInstance.java:38)
        at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:106)
        at org.jan.jacs2.auth.impl.AuthProvider$1164051396$Proxy$_$$_WeldClientProxy.authenticate(Unknown Source)
        at org.jan.jacs2.rest.sync.v2.dataresources.AuthResource.authenticate(AuthResource.java:54)
        at org.jan.jacs2.rest.sync.v2.dataresources.AuthResource$Proxy$_$$_WeldClientProxy.authenticate(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:52)
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:124)
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:167)
        at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:219)
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:79)
        at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:469)
        at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:391)
        at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:80)
        at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:253)
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
        at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
        at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:232)
        at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:680)
        at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:392)
        at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:346)
        at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:365)
        at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:318)
        at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
        at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
        at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
        at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
        at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
        at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132)
        at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
        at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
        at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
        at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
        at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
        at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
        at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
        at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
        at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
        at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
        at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
        at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
        at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
        at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
        at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
        at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
        at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
        at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
        at io.undertow.server.Connectors.executeRootHandler(Connectors.java:364)
        at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.directory.api.ldap.model.exception.LdapException: org.apache.directory.api.ldap.model.cursor.CursorLdapReferralException
        at org.jan.jacs2.auth.impl.LDAPAuthProvider.getUserInfo(LDAPAuthProvider.java:188)
        at org.jan.jacs2.auth.impl.LDAPAuthProvider.authenticate(LDAPAuthProvider.java:110)
        ... 63 common frames omitted
Caused by: org.apache.directory.api.ldap.model.cursor.CursorLdapReferralException: null
        at org.apache.directory.ldap.client.api.EntryCursorImpl.get(EntryCursorImpl.java:171)
        at org.apache.directory.ldap.client.api.EntryCursorImpl.get(EntryCursorImpl.java:52)
        at org.jan.jacs2.auth.impl.LDAPAuthProvider.getUserInfo(LDAPAuthProvider.java:175)
        ... 64 common frames omitted