java.lang.IllegalArgumentException: Prometheus requires that all meters with the same name have the same set of tag keys.
创建Spring Cloud Sleuth对应Zipkin服务，引入依赖：
<dependency> <groupId>io.zipkin.java</groupId> <artifactId>zipkin-server</artifactId> <version>2.12.3</version> </dependency> <dependency> <groupId>io.zipkin.java</groupId> <artifactId>zipkin-autoconfigure-ui</artifactId> <version>2.12.3</version> </dependency>
properties文件：
server.port=8083
spring.application.name=DEMO-ZIPKIN
# consul
spring.cloud.consul.host=127.0.0.1
spring.cloud.consul.port=8500
启动类中加入@EnableZipkinServer
服务启动成功，但是在访问时（http://localhost:8083）出现以下错误：
2019-08-29 23:23:58.120 ERROR 60481 --- [ XNIO-1 task-2] io.undertow.request : UT005023: Exception handling request to /favicon.ico java.lang.IllegalArgumentException: Prometheus requires that all meters with the same name have the same set of tag keys. There is already an existing meter named 'http_server_requests_seconds' containing tag keys [method, status, uri]. The meter you are attempting to register has keys [exception, method, outcome, status, uri]. at io.micrometer.prometheus.PrometheusMeterRegistry.lambda$collectorByName$9(PrometheusMeterRegistry.java:372) ~[micrometer-registry-prometheus-1.1.5.jar:1.1.5] at java.util.concurrent.ConcurrentHashMap.compute(ConcurrentHashMap.java:1877) ~[na:1.8.0_191] at io.micrometer.prometheus.PrometheusMeterRegistry.collectorByName(PrometheusMeterRegistry.java:359) ~[micrometer-registry-prometheus-1.1.5.jar:1.1.5] at io.micrometer.prometheus.PrometheusMeterRegistry.newTimer(PrometheusMeterRegistry.java:165) ~[micrometer-registry-prometheus-1.1.5.jar:1.1.5] at io.micrometer.core.instrument.MeterRegistry.lambda$timer$2(MeterRegistry.java:270) ~[micrometer-core-1.1.5.jar:1.1.5] at io.micrometer.core.instrument.MeterRegistry.getOrCreateMeter(MeterRegistry.java:575) ~[micrometer-core-1.1.5.jar:1.1.5] at io.micrometer.core.instrument.MeterRegistry.registerMeterIfNecessary(MeterRegistry.java:528) ~[micrometer-core-1.1.5.jar:1.1.5] at io.micrometer.core.instrument.MeterRegistry.timer(MeterRegistry.java:268) ~[micrometer-core-1.1.5.jar:1.1.5] at io.micrometer.core.instrument.Timer$Builder.register(Timer.java:464) ~[micrometer-core-1.1.5.jar:1.1.5] at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.stop(WebMvcMetricsFilter.java:180) ~[spring-boot-actuator-2.1.7.RELEASE.jar:2.1.7.RELEASE] at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.record(WebMvcMetricsFilter.java:169) ~[spring-boot-actuator-2.1.7.RELEASE.jar:2.1.7.RELEASE] at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:130) ~[spring-boot-actuator-2.1.7.RELEASE.jar:2.1.7.RELEASE] at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:104) ~[spring-boot-actuator-2.1.7.RELEASE.jar:2.1.7.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE] at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) ~[undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) ~[undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE] at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) ~[undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) ~[undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84) ~[undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) ~[undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68) ~[undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) ~[undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68) ~[undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132) ~[undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) ~[undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) ~[undertow-core-2.0.23.Final.jar:2.0.23.Final] at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) ~[undertow-core-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) ~[undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60) ~[undertow-core-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77) ~[undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43) ~[undertow-core-2.0.23.Final.jar:2.0.23.Final] at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) ~[undertow-core-2.0.23.Final.jar:2.0.23.Final] at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) ~[undertow-core-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:269) [undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78) [undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133) [undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130) [undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48) [undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43) [undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249) [undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78) [undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:99) [undertow-servlet-2.0.23.Final.jar:2.0.23.Final] at io.undertow.server.Connectors.executeRootHandler(Connectors.java:376) [undertow-core-2.0.23.Final.jar:2.0.23.Final] at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830) [undertow-core-2.0.23.Final.jar:2.0.23.Final] at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35) [jboss-threads-2.3.2.Final.jar:2.3.2.Final] at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985) [jboss-threads-2.3.2.Final.jar:2.3.2.Final] at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487) [jboss-threads-2.3.2.Final.jar:2.3.2.Final] at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1378) [jboss-threads-2.3.2.Final.jar:2.3.2.Final] at java.lang.Thread.run(Thread.java:748) [na:1.8.0_191]
解决方法：
在配置文件中加入：management.metrics.web.server.auto-time-requests=false
源码MetricsProperties类中的内部类：
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