Spring Boot actuator with multiple web applications in a tomcat container throws javax.management.InstanceAlreadyExistsException exception

Question

I am running multiple spring boot applications inside a tomcat container (not embedded - just standalone tomcat container). However, it is giving me the following exceptions when launching the web applications. It is not affecting the functionality of any of the web applications, but is nevertheless something I'd like to resolve to have a clean startup.

Any help on how to fix this is highly appreciated.

Using Spring Boot 1.1.7

org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to register MBean [org.springframework.boot.actuate.endpoint.jmx.DataEndpointMBean@14bee2f1] wit
h key 'metricsEndpoint'; nested exception is javax.management.InstanceAlreadyExistsException: org.springframework.boot:type=Endpoint,name=metricsEndpoint
        at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:609)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.registerEndpoint(EndpointMBeanExporter.java:162)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.locateAndRegisterEndpoints(EndpointMBeanExporter.java:142)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.doStart(EndpointMBeanExporter.java:134)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.start(EndpointMBeanExporter.java:257)
        at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:173)
        at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:51)
        at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:346)
        at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:149)
        at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:112)
        at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:775)
        at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:131)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:485)
        at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:109)
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:691)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
        at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:142)

---

org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to register MBean [org.springframework.boot.actuate.endpoint.jmx.DataEndpointMBean@1be9493f] with key 'traceEndpoint'; nested exception is javax.management.InstanceAlreadyExistsException: org.springframework.boot:type=Endpoint,name=traceEndpoint
        at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:609)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.registerEndpoint(EndpointMBeanExporter.java:162)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.locateAndRegisterEndpoints(EndpointMBeanExporter.java:142)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.doStart(EndpointMBeanExporter.java:134)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.start(EndpointMBeanExporter.java:257)
        at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:173)
        at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:51)
        at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:346)

---

org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to register MBean [org.springframework.boot.actuate.endpoint.jmx.DataEndpointMBean@533a21cd] with key 'dumpEndpoint'; nested exception is javax.management.InstanceAlreadyExistsException: org.springframework.boot:type=Endpoint,name=dumpEndpoint
        at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:609)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.registerEndpoint(EndpointMBeanExporter.java:162)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.locateAndRegisterEndpoints(EndpointMBeanExporter.java:142)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.doStart(EndpointMBeanExporter.java:134)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.start(EndpointMBeanExporter.java:257)
        at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:173)
        at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:51)
        at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:346)
        at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:149)

---

org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to register MBean [org.springframework.boot.actuate.endpoint.jmx.DataEndpointMBean@695b578c] with key 'autoConfigurationAuditEndpoint'; nested exception is javax.management.InstanceAlreadyExistsException: org.springframework.boot:type=Endpoint,name=autoConfigurationAuditEndpoint
        at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:609)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.registerEndpoint(EndpointMBeanExporter.java:162)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.locateAndRegisterEndpoints(EndpointMBeanExporter.java:142)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.doStart(EndpointMBeanExporter.java:134)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.start(EndpointMBeanExporter.java:257)
        at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:173)
        at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:51)
        at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:346)
        at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:149)

---

org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to register MBean [org.springframework.boot.actuate.endpoint.jmx.ShutdownEndpointMBean@7271ef13] with key 'shutdownEndpoint'; nested exception is javax.management.InstanceAlreadyExistsException: org.springframework.boot:type=Endpoint,name=shutdownEndpoint
        at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:609)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.registerEndpoint(EndpointMBeanExporter.java:162)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.locateAndRegisterEndpoints(EndpointMBeanExporter.java:142)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.doStart(EndpointMBeanExporter.java:134)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.start(EndpointMBeanExporter.java:257)
        at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:173)
        at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:51)

---

org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to register MBean [org.springframework.boot.actuate.endpoint.jmx.DataEndpointMBean@34ea9086] with key 'configurationPropertiesReportEndpoint'; nested exception is javax.management.InstanceAlreadyExistsException: org.springframework.boot:type=Endpoint,name=configurationPropertiesReportEndpoint
        at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:609)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.registerEndpoint(EndpointMBeanExporter.java:162)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.locateAndRegisterEndpoints(EndpointMBeanExporter.java:142)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.doStart(EndpointMBeanExporter.java:134)
        at org.springframework.boot.actuate.endpoint.jmx.EndpointMBeanExporter.start(EndpointMBeanExporter.java:257)
        at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:173)
        at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:51)
        at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:346)
        at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:149)

Answer 1

By default all endpoints are registered under the domain org.springboot and with a default name. These can be overridden by setting endpoints.jmx.* properties. See here .

You might want to change either the domain per application or set the endpoints.jmx.unique-names to true.

Answer 2

通过添加以下属性来禁用application.properties中的JMX

spring.jmx.enabled = false

Answer 3

Unique names did not work for me. I had to also add a default domain.

Here's my yml code

spring:
  jmx:
    default-domain: agentservice

endpoints: 
  jmx:
    domain: agentservice
    unique-names: true

Answer 4

spring:
  jmx:
    default-domain: agentservice

endpoints: 
  jmx:
    domain: agentservice
    unique-names: true

Works above config with me while deploying multiple instances on same JVM

Answer 5

To augment Gondy's answer, which I voted up, below is a link that says exactly why it works. PhilWebb says "It turns out registering the JMX information by default can cause some issues if you use Spring's Test Context Framework. .. By default, tests with @ContextConfiguration keep contexts open" and "I think we need to change spring.datasource.jmx-enabled to default to false and make this one opt-in"

See GitHub (at "philwebb commented on 7 Nov 2014")

---

I appreciate this isnt a unique answer. but this problem has been beating me for some time, Gondy's answer helped me and then I subsequently found out why and wanted to share that extra information in the only way available to me

Answer 6

I got this error org.springframework.jmx.export.UnableToRegisterMBeanException due to javax.management.InstanceAlreadyExistsException while deploying multiple webapps (Spring Boot in my case) on a single Tomcat server.
After some searching on the web I found this:
" With spring.jmx.enabled set to true (the default), any beans in the context that are MBeans will be automatically registered with the JMX server. "
Source: https://github.com/spring-projects/spring-boot/issues/9179

Options are:

Option-1) Set spring.jmx.enabled=false
Source: https://github.com/spring-projects/spring-boot/issues/9179

Option-2) Provide unique names to JMX beans for each webapp deployed
spring.jmx.default-domain: app1
spring.jmx.default-domain: app2
Source: https://github.com/jhipster/generator-jhipster/issues/874

Option-3) Change the names of the beans itself, in each webapp
@Bean
public DataSource app1DataSource() {...}
@Bean
public DataSource app2DataSource() {...}