Hi all, We're encountering a NullPointerException during our scraping of JMX Metrics in Keycloak. More precisely: - We're exporting the jmx via Prometheus Exporter Agent (javaagent) - Our additional run params are the following: "-Djava.util.logging.manager=org.jboss.logmanager.LogManager -Djboss.modules.system.pkgs=org.jboss.byteman,org.jboss.logmanager -Xbootclasspath/p:/opt/jboss/keycloak/modules/system/layers/base/org/jboss/logmanager/main/jboss-logmanager-2.1.7.Final.jar -Xbootclasspath/p:$JBOSS_HOME/modules/system/layers/base/org/wildfly/common/main/wildfly-common-1.4.0.Final.jar -javaagent:/opt/jboss/keycloak/jmx_prometheus_javaagent.jar=18080:/home/config.yaml" - Everytime Prometheus scrapes on the 18080 port, we encounter a lot of Null pointer exceptions related to LockingMetric.java. See the following error: 12:42:08,318 ERROR [org.jboss.as.controller.management-operation] (pool-1-thread-3) WFLYCTL0013: Operation ("read-attribute") failed - address: ([ keycloak_1 | ("subsystem" => "infinispan"), keycloak_1 | ("cache-container" => "keycloak"), keycloak_1 | ("local-cache" => "users"), keycloak_1 | ("component" => "locking") keycloak_1 | ]): java.lang.NullPointerException keycloak_1 | at org.jboss.as.clustering.infinispan.subsystem.LockingMetric$1.execute(LockingMetric.java:41) keycloak_1 | at org.jboss.as.clustering.infinispan.subsystem.LockingMetric$1.execute(LockingMetric.java:38) keycloak_1 | at org.jboss.as.clustering.infinispan.subsystem.LockingMetricExecutor.execute(LockingMetricExecutor.java:46) keycloak_1 | at org.jboss.as.clustering.infinispan.subsystem.LockingMetricExecutor.execute(LockingMetricExecutor.java:37) keycloak_1 | at org.jboss.as.clustering.controller.MetricHandler.executeRuntimeStep(MetricHandler.java:75) keycloak_1 | at org.jboss.as.controller.AbstractRuntimeOnlyHandler$1.execute(AbstractRuntimeOnlyHandler.java:59) keycloak_1 | at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:999) keycloak_1 | at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:743) keycloak_1 | at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:467) keycloak_1 | at org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1411) keycloak_1 | at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:423) keycloak_1 | at org.jboss.as.controller.ModelControllerImpl.lambda$execute$0(ModelControllerImpl.java:227) keycloak_1 | at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:265) keycloak_1 | at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:231) keycloak_1 | at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:227) keycloak_1 | at org.jboss.as.jmx.model.ModelControllerMBeanHelper.execute(ModelControllerMBeanHelper.java:555) keycloak_1 | at org.jboss.as.jmx.model.ModelControllerMBeanHelper.getAttribute(ModelControllerMBeanHelper.java:316) keycloak_1 | at org.jboss.as.jmx.model.ModelControllerMBeanHelper.getAttributes(ModelControllerMBeanHelper.java:294) keycloak_1 | at org.jboss.as.jmx.model.ModelControllerMBeanServerPlugin.getAttributes(ModelControllerMBeanServerPlugin.java:146) keycloak_1 | at org.jboss.as.jmx.PluggableMBeanServerImpl.getAttributes(PluggableMBeanServerImpl.java:416) keycloak_1 | at io.prometheus.jmx.shaded.io.prometheus.jmx.JmxScraper.scrapeBean(JmxScraper.java:151) keycloak_1 | at io.prometheus.jmx.shaded.io.prometheus.jmx.JmxScraper.doScrape(JmxScraper.java:117) keycloak_1 | at io.prometheus.jmx.shaded.io.prometheus.jmx.JmxCollector.collect(JmxCollector.java:460) keycloak_1 | at io.prometheus.jmx.shaded.io.prometheus.client.CollectorRegistry$MetricFamilySamplesEnumeration.findNextElement(CollectorRegistry.java:183) keycloak_1 | at io.prometheus.jmx.shaded.io.prometheus.client.CollectorRegistry$MetricFamilySamplesEnumeration.nextElement(CollectorRegistry.java:216) keycloak_1 | at io.prometheus.jmx.shaded.io.prometheus.client.CollectorRegistry$MetricFamilySamplesEnumeration.nextElement(CollectorRegistry.java:137) keycloak_1 | at io.prometheus.jmx.shaded.io.prometheus.client.exporter.common.TextFormat.write004(TextFormat.java:22) keycloak_1 | at io.prometheus.jmx.shaded.io.prometheus.client.exporter.HTTPServer$HTTPMetricHandler.handle(HTTPServer.java:59) keycloak_1 | at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:79) keycloak_1 | at sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:83) keycloak_1 | at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:82) keycloak_1 | at sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:675) keycloak_1 | at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:79) keycloak_1 | at sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:647) keycloak_1 | at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) keycloak_1 | at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) keycloak_1 | at java.lang.Thread.run(Thread.java:748) We're getting this error on Keycloak 6.0.0, 5.0.0 and 4.8.3Final versions (we didn't try with previous versions). Is there something we're missing? Thank you in advance, Matteo -- Like <https://www.facebook.com/cuebiq/> I Follow <https://twitter.com/Cuebiq>I Connect <https://www.linkedin.com/company/cuebiq> This email is reserved exclusively for sending and receiving messages inherent working activities, and is not intended nor authorized for personal use. Therefore, any outgoing messages or incoming response messages will be treated as company messages and will be subject to the corporate IT policy and may possibly to be read by persons other than by the subscriber of the box. Confidential information may be contained in this message. If you are not the address indicated in this message, please do not copy or deliver this message to anyone. In such case, you should notify the sender immediately and delete the original message.