使用DruidDataSource配置多数据源，项目启动报错，DuridMetrics类报空指针异常，

一、该问题的重现步骤是什么？

1. 配置多数据源使用

DruidDataSource

获取每个数据源配置

将多个数据源加载到MltiRouteDataSource中

2. 

3.

二、你期待的结果是什么？实际看到的又是什么？

期待结果：项目正常启动且访问无异常

实际看到：启动报错，无法正常启动

三、你正在使用的是什么产品，什么版本？在什么操作系统上？

bladex 3.0.1升级到3.4.0 windows

四、请提供详细的错误堆栈信息，这很重要。

org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is java.lang.RuntimeException: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'webMvcMetricsFilter' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/web/servlet/WebMvcMetricsAutoConfiguration.class]: Unsatisfied dependency expressed through method 'webMvcMetricsFilter' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'prometheusMeterRegistry' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/export/prometheus/PrometheusMetricsExportAutoConfiguration.class]: Initialization of bean failed; nested exception is java.lang.NullPointerException

at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:165) ~[spring-boot-2.7.18.jar:2.7.18]

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:585) ~[spring-context-5.3.31.jar:5.3.31]

at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.18.jar:2.7.18]

at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:732) ~[spring-boot-2.7.18.jar:2.7.18]

at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:409) ~[spring-boot-2.7.18.jar:2.7.18]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) ~[spring-boot-2.7.18.jar:2.7.18]

at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:164) [spring-boot-2.7.18.jar:2.7.18]

at org.springblade.core.launch.BladeApplication.run(BladeApplication.java:50) [blade-core-launch-3.4.0.RELEASE.jar:na]

at org.springblade.zdtalentportrait.ZdtalentportraitApplication.main(ZdtalentportraitApplication.java:37) [classes/:na]

Caused by: java.lang.RuntimeException: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'webMvcMetricsFilter' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/web/servlet/WebMvcMetricsAutoConfiguration.class]: Unsatisfied dependency expressed through method 'webMvcMetricsFilter' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'prometheusMeterRegistry' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/export/prometheus/PrometheusMetricsExportAutoConfiguration.class]: Initialization of bean failed; nested exception is java.lang.NullPointerException

at io.undertow.servlet.core.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:257) ~[undertow-servlet-2.2.28.Final.jar:2.2.28.Final]

at org.springframework.boot.web.embedded.undertow.UndertowServletWebServerFactory.createManager(UndertowServletWebServerFactory.java:330) ~[spring-boot-2.7.18.jar:2.7.18]

at org.springframework.boot.web.embedded.undertow.UndertowServletWebServerFactory.getWebServer(UndertowServletWebServerFactory.java:299) ~[spring-boot-2.7.18.jar:2.7.18]

at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:184) ~[spring-boot-2.7.18.jar:2.7.18]

at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:162) ~[spring-boot-2.7.18.jar:2.7.18]

... 8 common frames omitted

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'webMvcMetricsFilter' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/web/servlet/WebMvcMetricsAutoConfiguration.class]: Unsatisfied dependency expressed through method 'webMvcMetricsFilter' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'prometheusMeterRegistry' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/export/prometheus/PrometheusMetricsExportAutoConfiguration.class]: Initialization of bean failed; nested exception is java.lang.NullPointerException

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:801) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:536) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1352) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1195) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:213) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.boot.web.servlet.ServletContextInitializerBeans.getOrderedBeansOfType(ServletContextInitializerBeans.java:213) ~[spring-boot-2.7.18.jar:2.7.18]

at org.springframework.boot.web.servlet.ServletContextInitializerBeans.getOrderedBeansOfType(ServletContextInitializerBeans.java:204) ~[spring-boot-2.7.18.jar:2.7.18]

at org.springframework.boot.web.servlet.ServletContextInitializerBeans.addServletContextInitializerBeans(ServletContextInitializerBeans.java:98) ~[spring-boot-2.7.18.jar:2.7.18]

at org.springframework.boot.web.servlet.ServletContextInitializerBeans.<init>(ServletContextInitializerBeans.java:86) ~[spring-boot-2.7.18.jar:2.7.18]

at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.getServletContextInitializerBeans(ServletWebServerApplicationContext.java:262) ~[spring-boot-2.7.18.jar:2.7.18]

at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.selfInitialize(ServletWebServerApplicationContext.java:236) ~[spring-boot-2.7.18.jar:2.7.18]

at org.springframework.boot.web.embedded.undertow.UndertowServletWebServerFactory$Initializer.onStartup(UndertowServletWebServerFactory.java:508) ~[spring-boot-2.7.18.jar:2.7.18]

at io.undertow.servlet.core.DeploymentManagerImpl$1.call(DeploymentManagerImpl.java:204) ~[undertow-servlet-2.2.28.Final.jar:2.2.28.Final]

at io.undertow.servlet.core.DeploymentManagerImpl$1.call(DeploymentManagerImpl.java:187) ~[undertow-servlet-2.2.28.Final.jar:2.2.28.Final]

at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:42) ~[undertow-servlet-2.2.28.Final.jar:2.2.28.Final]

at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43) ~[undertow-servlet-2.2.28.Final.jar:2.2.28.Final]

at io.undertow.servlet.core.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:255) ~[undertow-servlet-2.2.28.Final.jar:2.2.28.Final]

... 12 common frames omitted

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'prometheusMeterRegistry' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/export/prometheus/PrometheusMetricsExportAutoConfiguration.class]: Initialization of bean failed; nested exception is java.lang.NullPointerException

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:628) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1391) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1311) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:911) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:788) ~[spring-beans-5.3.31.jar:5.3.31]

... 33 common frames omitted

Caused by: java.lang.NullPointerException: null

at org.springblade.core.metrics.druid.DruidMetrics.lambda$bindTo$0(DruidMetrics.java:69) ~[blade-starter-metrics-3.4.0.RELEASE.jar:na]

at java.util.HashMap.forEach(HashMap.java:1289) ~[na:1.8.0_191]

at org.springblade.core.metrics.druid.DruidMetrics.bindTo(DruidMetrics.java:67) ~[blade-starter-metrics-3.4.0.RELEASE.jar:na]

at org.springframework.boot.actuate.autoconfigure.metrics.MeterRegistryConfigurer.lambda$addBinders$1(MeterRegistryConfigurer.java:87) ~[spring-boot-actuator-autoconfigure-2.7.18.jar:2.7.18]

at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) ~[na:1.8.0_191]

at java.util.ArrayList.forEach(ArrayList.java:1257) ~[na:1.8.0_191]

at java.util.stream.SortedOps$RefSortingSink.end(SortedOps.java:390) ~[na:1.8.0_191]

at java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:1.8.0_191]

at java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:1.8.0_191]

at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) ~[na:1.8.0_191]

at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[na:1.8.0_191]

at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) ~[na:1.8.0_191]

at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) ~[na:1.8.0_191]

at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_191]

at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418) ~[na:1.8.0_191]

at org.springframework.boot.actuate.autoconfigure.metrics.MeterRegistryConfigurer.addBinders(MeterRegistryConfigurer.java:87) ~[spring-boot-actuator-autoconfigure-2.7.18.jar:2.7.18]

at org.springframework.boot.actuate.autoconfigure.metrics.MeterRegistryConfigurer.configure(MeterRegistryConfigurer.java:68) ~[spring-boot-actuator-autoconfigure-2.7.18.jar:2.7.18]

at org.springframework.boot.actuate.autoconfigure.metrics.MeterRegistryPostProcessor.postProcessAfterInitialization(MeterRegistryPostProcessor.java:64) ~[spring-boot-actuator-autoconfigure-2.7.18.jar:2.7.18]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:455) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1808) ~[spring-beans-5.3.31.jar:5.3.31]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.31.jar:5.3.31]

... 43 common frames omitted

五、若有更多详细信息，请在下面提供。

debug查找是DuridMetrics类的buildto方法报空指针异常如图一。3.0.1版本debug测试查看调用的是

druidDataSourceMetadataProvider方法，如图二。
升级3.4.0后debug测试不再调用druidDataSourceMetadataProvider方法， 改调用
public DruidMetrics druidMetrics(ObjectProvider<Map<String, DataSource>> dataSourcesProvider) 方法

图一：

图二：