I am attempting to follow the [instructions for testing SCIM API with UMA authorization](https://gluu.org/docs/gluu-server/user-management/scim2/#simple-retrieval). I followed the instructions for enabling SCIM and UMA, importing the TLS cert into my local Java keystore (in this case that cert comes from our loadbalancer), downloading the scim-rp.jks file, and I extracted the keystore password from Vault. I was expecting to see a log entry with the admin user's display name, but the sample code is throwing an exception because a 502 page is returned instead of the expected JSON results. This is the sample code I'm using: ``` package org.tcp.usermgmtclient; import gluu.scim2.client.factory.ScimClientFactory; import gluu.scim2.client.rest.ClientSideService; import org.gluu.oxtrust.model.scim2.BaseScimResource; import org.gluu.oxtrust.model.scim2.ListResponse; import org.gluu.oxtrust.model.scim2.user.UserResource; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.boot.CommandLineRunner; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import javax.ws.rs.core.Response; import java.util.List; @SpringBootApplication public class UserMgmtClientApplication implements CommandLineRunner { private String domainURL = "https://auth.tcpdev.org/identity/restv1"; private String umaAatClientId = "1202.fa5c7517-d54b-4b53-90b9-e1ba387e44aa"; private String umaAatClientJksPath = "certs/scim-rp.jks"; private String umaAatClientJksPassword = "tR6J4wtIU8l8"; private String umaAatClientKeyId = ""; private static final Logger LOG = LoggerFactory .getLogger(UserMgmtClientApplication.class); public static void main(String[] args) { LOG.info("STARTING THE APPLICATION"); SpringApplication.run(UserMgmtClientApplication.class, args); LOG.info("APPLICATION FINISHED"); } @Override public void run(String... args) throws Exception { LOG.info("EXECUTING : command line runner"); ClientSideService client = ScimClientFactory.getClient(domainURL, umaAatClientId, umaAatClientJksPath, umaAatClientJksPassword, umaAatClientKeyId); String filter = "userName eq \"admin\""; Response response = client.searchUsers(filter, 1, 1, null, null, null, null); LOG.info("Got response : Status Code " + response.getStatus()); List<BaseScimResource> resources = response.readEntity(ListResponse.class).getResources(); LOG.info("Length of results list is: {}", resources.size()); UserResource admin = (UserResource) resources.get(0); LOG.info("First user in the list is: {}" + admin.getDisplayName()); client.close(); for (int i = 0; i < args.length; ++i) { LOG.info("args[{}]: {}", i, args[i]); } } } ``` This is the output and stack trace: ``` 2020-09-11 14:41:13.692 INFO 7013 --- [ main] o.t.u.UserMgmtClientApplication : Got response : Status Code 502 2020-09-11 14:41:13.696 INFO 7013 --- [ main] ConditionEvaluationReportLoggingListener : Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2020-09-11 14:41:13.702 ERROR 7013 --- [ main] o.s.boot.SpringApplication : Application run failed java.lang.IllegalStateException: Failed to execute CommandLineRunner at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:798) ~[spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE] at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:779) ~[spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:322) ~[spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) ~[spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE] at org.tcp.usermgmtclient.UserMgmtClientApplication.main(UserMgmtClientApplication.java:31) ~[classes/:na] Caused by: javax.ws.rs.ProcessingException: RESTEASY003145: Unable to find a MessageBodyReader of content-type text/html and type class org.gluu.oxtrust.model.scim2.ListResponse at org.jboss.resteasy.core.interception.ClientReaderInterceptorContext.throwReaderNotFound(ClientReaderInterceptorContext.java:42) ~[resteasy-jaxrs-3.5.1.Final.jar:3.5.1.Final] at org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.getReader(AbstractReaderInterceptorContext.java:80) ~[resteasy-jaxrs-3.5.1.Final.jar:3.5.1.Final] at org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.proceed(AbstractReaderInterceptorContext.java:53) ~[resteasy-jaxrs-3.5.1.Final.jar:3.5.1.Final] at org.jboss.resteasy.client.jaxrs.internal.ClientResponse.readFrom(ClientResponse.java:324) ~[resteasy-client-3.5.1.Final.jar:3.5.1.Final] at org.jboss.resteasy.client.jaxrs.internal.ClientResponse.readEntity(ClientResponse.java:251) ~[resteasy-client-3.5.1.Final.jar:3.5.1.Final] at org.jboss.resteasy.specimpl.BuiltResponse.readEntity(BuiltResponse.java:237) ~[resteasy-jaxrs-3.5.1.Final.jar:3.5.1.Final] at org.tcp.usermgmtclient.UserMgmtClientApplication.run(UserMgmtClientApplication.java:46) ~[classes/:na] at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:795) ~[spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE] ... 5 common frames omitted ``` Thanks in advance for any insight, Chris