Exception while exporting metrics during WildFly initialization --------------------------------------------------------------- Key: WFLY-13188 URL: https://issues.redhat.com/browse/WFLY-13188 Project: WildFly Issue Type: Bug Components: MP Metrics Affects Versions: 18.0.1.Final, 19.0.0.Beta2 Reporter: Ehsan Zaery Moghaddam Assignee: Brian Stansberry Priority: Major Labels: Microprofile When the open tracing system is enabled and some metrics are exposed, if when the WildFly is in the startup process, the Prometheus server calls the /metrics endpoint, WildFly prints a stacktrace for each metrics that is has detected (i.e. more than thousands) with the following message: *WFLYCTL0379: System boot is in process; execution of remote management operations is not currently available * In some cases the error persists, even after the server startup is done and we need to restart the WildFly; but we couldn't find the exact scenario for that. Here is an example for wildfly_jpa_second_level_cache_size_in_memory metric: {code} 2020-03-02 09:38:06,739 WARN [management I/O-2] [metrics] Unable to export metric wildfly_jpa_second_level_cache_size_in_memory: java.lang.IllegalStateException: WFLYMETRICS0003: Unable to read attribute second-level-cache-size-in-memory on [ ("deployment" => "application.ear"), ("subdeployment" => "application-persistence.jar"), ("subsystem" => "jpa"), ("hibernate-persistence-unit" => "application.ear/application-persistence.jar#app"), ("entity-cache" => "com.app.persistence.entity.Country") ]: "WFLYCTL0379: System boot is in process; execution of remote management operations is not currently available". at org.wildfly.extension.microprofile.metrics.MetricCollector.readAttributeValue(MetricCollector.java:303) at org.wildfly.extension.microprofile.metrics.MetricCollector.access$200(MetricCollector.java:70) at org.wildfly.extension.microprofile.metrics.MetricCollector$2.getValue(MetricCollector.java:174) at org.wildfly.extension.microprofile.metrics.MetricCollector$2.getValue(MetricCollector.java:171) at io.smallrye.metrics.exporters.OpenMetricsExporter.createSimpleValueLine(OpenMetricsExporter.java:445) at io.smallrye.metrics.exporters.OpenMetricsExporter.exposeEntries(OpenMetricsExporter.java:178) at io.smallrye.metrics.exporters.OpenMetricsExporter.getEntriesForScope(OpenMetricsExporter.java:150) at io.smallrye.metrics.exporters.OpenMetricsExporter.exportAllScopes(OpenMetricsExporter.java:101) at io.smallrye.metrics.MetricsRequestHandler.handleRequest(MetricsRequestHandler.java:116) at io.smallrye.metrics.MetricsRequestHandler.handleRequest(MetricsRequestHandler.java:73) at org.wildfly.extension.microprofile.metrics.MetricsContextService$1.handleRequest(MetricsContextService.java:81) at org.jboss.as.domain.http.server.security.RealmReadinessHandler.handleRequest(RealmReadinessHandler.java:51) at org.jboss.as.domain.http.server.security.ServerErrorReadinessHandler.handleRequest(ServerErrorReadinessHandler.java:35) at io.undertow.server.handlers.PathHandler.handleRequest(PathHandler.java:91) at io.undertow.server.handlers.ChannelUpgradeHandler.handleRequest(ChannelUpgradeHandler.java:211) at io.undertow.server.handlers.cache.CacheHandler.handleRequest(CacheHandler.java:92) at io.undertow.server.handlers.error.SimpleErrorPageHandler.handleRequest(SimpleErrorPageHandler.java:78) at io.undertow.server.handlers.CanonicalPathHandler.handleRequest(CanonicalPathHandler.java:49) at org.jboss.as.domain.http.server.ManagementHttpRequestHandler.handleRequest(ManagementHttpRequestHandler.java:57) at org.jboss.as.domain.http.server.cors.CorsHttpHandler.handleRequest(CorsHttpHandler.java:75) at org.jboss.as.domain.http.server.ManagementHttpServer$UpgradeFixHandler.handleRequest(ManagementHttpServer.java:666) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:376) at io.undertow.server.protocol.http.HttpReadListener.handleEventWithNoRunningRequest(HttpReadListener.java:255) at io.undertow.server.protocol.http.HttpReadListener.handleEvent(HttpReadListener.java:136) at io.undertow.server.protocol.http.HttpReadListener.handleEvent(HttpReadListener.java:59) at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) at org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66) at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:89) at org.xnio.nio.WorkerThread.run(WorkerThread.java:591) {code}