我最近将我们的系统从 Spring Boot 1.5 升级到 2.1.3 并添加了spring-boot-starter-actuator
. 显然,有些东西配置错误,因为有一个NullPointerException
in TomcatMetrics::registerMetricsEventually
:
java.lang.NullPointerException: null
at io.micrometer.core.instrument.binder.tomcat.TomcatMetrics.lambda$registerMetricsEventually$aa4da135$1(TomcatMetrics.java:260)
at java.management/javax.management.NotificationBroadcasterSupport.sendNotification(NotificationBroadcasterSupport.java:238)
at java.management/javax.management.MBeanServerDelegate.sendNotification(MBeanServerDelegate.java:211)
at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.sendNotification(DefaultMBeanServerInterceptor.java:1473)
at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1867)
at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:955)
at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:890)
at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:320)
at java.management/com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)
at org.apache.tomcat.util.modeler.Registry.registerComponent(Registry.java:639)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.register(AbstractProtocol.java:1059)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:823)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:834)
空指针出现在这里:
return objectName.getDomain().equals(getJmxDomain()) && objectName.getKeyProperty(key).equals(value);
因为objectName.getKeyProperty("j2eeType")
返回 null。
这是否表明某些东西明显配置错误?