# KC 20.0.1 Prometheus /metrics Internal Server Error **URL:** \ **Category:** Configuring the server\ **Created:** [April 13, 2023, 8:43am UTC](https://forum.keycloak.org/t/kc-20-0-1-prometheus-metrics-internal-server-error/21460 "2023-04-13T08:43:25Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![NATION42](https://yyz2.discourse-cdn.com/free1/user_avatar/forum.keycloak.org/nation42/32/8258_2.png) [@NATION42](https://forum.keycloak.org/u/NATION42)\ **Post date:** [April 13, 2023, 8:43am UTC](https://forum.keycloak.org/t/kc-20-0-1-prometheus-metrics-internal-server-error/21460/1 "2023-04-13T08:43:25Z")
Hello, we have updated a test system (Linux RHEL 8.5 | Java OpenJdk-11.0.16) from Keycloak 18.0.1 to 20.0.1, with version 18.x the Prometheus endpoint [https://xx.xx.xx.xx/auth/metrics](https://xx.xx.xx.xx/auth/metrics) worked but after updating to version 20.0.1 we got an internal server error. - kc.sh build we have done and the KC starts without optimized - KC is behind a reverse proxy the aerogear/keycloak-metrics-spi metrics work but the internal ones do not. with KC 20.0.5 the same can someone help? thank you ERROR: ```auto 2023-04-13 10:31:57,269 ERROR [io.quarkus.vertx.http.runtime.QuarkusErrorHandler] (executor-thread-0) HTTP Request to /auth/metrics failed, error id: 8b5a3e96-0f7a-449c-b557-7088369dead6-4: java.lang.NullPointerException at org.keycloak.services.error.KeycloakErrorHandler.getResponse(KeycloakErrorHandler.java:61) at org.keycloak.services.error.KeycloakErrorHandler.toResponse(KeycloakErrorHandler.java:56) at org.jboss.resteasy.core.ExceptionHandler.executeExceptionMapper(ExceptionHandler.java:136) at org.jboss.resteasy.core.ExceptionHandler.handleException(ExceptionHandler.java:309) at org.jboss.resteasy.core.SynchronousDispatcher.writeException(SynchronousDispatcher.java:218) at org.jboss.resteasy.core.SynchronousDispatcher.lambda$invoke$4(SynchronousDispatcher.java:258) at org.jboss.resteasy.core.SynchronousDispatcher.lambda$preprocess$0(SynchronousDispatcher.java:161) at org.jboss.resteasy.core.interception.jaxrs.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:364) at org.jboss.resteasy.core.SynchronousDispatcher.preprocess(SynchronousDispatcher.java:164) at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:247) at io.quarkus.resteasy.runtime.standalone.RequestDispatcher.service(RequestDispatcher.java:73) at io.quarkus.resteasy.runtime.standalone.VertxRequestHandler.dispatch(VertxRequestHandler.java:151) at io.quarkus.resteasy.runtime.standalone.VertxRequestHandler$1.run(VertxRequestHandler.java:91) at io.quarkus.vertx.core.runtime.VertxCoreRecorder$14.runWith(VertxCoreRecorder.java:564) at org.jboss.threads.EnhancedQueueExecutor$Task.run(EnhancedQueueExecutor.java:2449) at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1478) at org.jboss.threads.DelegatingRunnable.run(DelegatingRunnable.java:29) at org.jboss.threads.ThreadLocalResettingRunnable.run(ThreadLocalResettingRunnable.java:29) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.base/java.lang.Thread.run(Thread.java:829) ``` config: ```auto # Basic settings for running in production. Change accordingly before deploying the server. # Database # The database vendor. db=mariadb # The username of the database user. db-username=keycloakdbuser # The password of the database user. db-password=s0m3P4$$ # The full database JDBC URL. If not provided, a default URL is set based on the selected database vendor. db-url=jdbc:mariadb://localhost:3306/keycloakdb # Observability # If the server should expose healthcheck endpoints. #health-enabled=true # If the server should expose metrics endpoints. metrics-enabled=true # HTTP # The file path to a server certificate or certificate chain in PEM format. #https-certificate-file=${kc.home.dir}conf/server.crt.pem # The file path to a private key in PEM format. #https-certificate-key-file=${kc.home.dir}conf/server.key.pem # The proxy address forwarding mode if the server is behind a reverse proxy. proxy=edge # Do not attach route to cookies and rely on the session affinity capabilities from reverse proxy #spi-sticky-session-encoder-infinispan-should-attach-route=false # Bindung an alle interfaces http-relative-path=auth ## Port conf http-port=9080 https-port=9443 ##http-port=80 ##https-port=443 # Hostname for the Keycloak server. # hostname=someIP hostname-strict=false ``` ![KC-metrics-error](https://global.discourse-cdn.com/free1/uploads/keycloak/original/2X/2/25708552ed045444713da9183bcfe6585eafba24.jpeg) ---
**Author:** ![mebo4b](https://avatars.discourse-cdn.com/v4/letter/m/8edcca/32.png) [@mebo4b](https://forum.keycloak.org/u/mebo4b)\ **Post date:** [April 24, 2023, 6:54am UTC](https://forum.keycloak.org/t/kc-20-0-1-prometheus-metrics-internal-server-error/21460/2 "2023-04-24T06:54:24Z")
Hi, we had the same issue in our environment and figured out, that the relative path must start with a “/” for the quarkus metrics. changing `http-relative-path=auth` to `http-relative-path=/auth` should fix your issue. ---
**Author:** ![NATION42](https://yyz2.discourse-cdn.com/free1/user_avatar/forum.keycloak.org/nation42/32/8258_2.png) [@NATION42](https://forum.keycloak.org/u/NATION42)\ **Post date:** [April 25, 2023, 5:12am UTC](https://forum.keycloak.org/t/kc-20-0-1-prometheus-metrics-internal-server-error/21460/3 "2023-04-25T05:12:44Z")
thanks for your help it works. ---
**Author:** ![stancristian88](https://yyz2.discourse-cdn.com/free1/user_avatar/forum.keycloak.org/stancristian88/32/6845_2.png) [@stancristian88](https://forum.keycloak.org/u/stancristian88)\ **Post date:** [June 13, 2023, 8:40pm UTC](https://forum.keycloak.org/t/kc-20-0-1-prometheus-metrics-internal-server-error/21460/4 "2023-06-13T20:40:26Z")
I am so grateful to you for this response! very good find.