Spring Boot - 如何配置 JMX 默认域答案

【问题标题】：Spring Boot - How to configure JMX default-domainSpring Boot - 如何配置 JMX 默认域
【发布时间】：2020-11-14 01:48:36
【问题描述】：

我看到了几个像this 这样的问题，但我不太确定在 JMX 方面正确运行 Spring Boot。这是我在控制台的错误：

2020-07-24 09:54:10.243 ERROR 14272 --- [  restartedMain] o.s.boot.SpringApplication               : Application run failed

org.springframework.context.ApplicationContextException: Failed to register LiveBeansView MBean; nested exception is javax.management.InstanceAlreadyExistsException: DefaultDomain:application=
    at org.springframework.context.support.LiveBeansView.registerApplicationContext(LiveBeansView.java:84) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:901) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:554) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.8.RELEASE.jar:2.2.8.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.8.RELEASE.jar:2.2.8.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.8.RELEASE.jar:2.2.8.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.8.RELEASE.jar:2.2.8.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.8.RELEASE.jar:2.2.8.RELEASE]
    at com.practicas.conexiona.ConexionaApplication.main(ConexionaApplication.java:22) [classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_251]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_251]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_251]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_251]
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.2.8.RELEASE.jar:2.2.8.RELEASE]
Caused by: javax.management.InstanceAlreadyExistsException: DefaultDomain:application=
    at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:437) ~[na:1.8.0_251]
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1898) ~[na:1.8.0_251]
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:966) ~[na:1.8.0_251]
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:900) ~[na:1.8.0_251]
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:324) ~[na:1.8.0_251]
    at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522) ~[na:1.8.0_251]
    at org.springframework.context.support.LiveBeansView.registerApplicationContext(LiveBeansView.java:80) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    ... 13 common frames omitted


Process finished with exit code 0

这是我的 application.properties：

server.port=9898

spring.jpa.database=MYSQL
spring.datasource.url=jdbc:mysql://xxxxxxxxxxxxxxxxxxxxxx
spring.datasource.username=practicas
spring.datasource.password=practicas2020
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.show-sql=true
spring.jpa.generate-ddl=false

#spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQLDialect
spring.jpa.properties.hibernate.id.new_generator_mappings = false
spring.jpa.properties.hibernate.format_sql = true
logging.level.org.hibernate.SQL=DEBUG
logging.level.org.hibernate.type.descriptor.sql.BasicBinder=TRACE 

spring.jpa.hibernate.naming.implicit-strategy=org.hibernate.boot.model.naming.ImplicitNamingStrategyJpaCompliantImpl
spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl

spring.profiles.active=application.properties

spring.jmx.enabled = false
#endpoints.jmx.unique-names = true

spring.jmx.default-domain=xxxxapplication
endpoints.jmx.domain=xxxxapplication

spring.application.admin.enabled=true

这是我现在的 pom.xml：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.8.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>xxxxxxxx</groupId>
    <artifactId>xxxxxxxxxxxx</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>crmiguez-project</name>
    <description>Spring Boot Project</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>1.4.197</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>5.4.2.Final</version>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.4.2.Final</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.4.2.Final</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.0-api</artifactId>
            <version>1.0.1.Final</version>
        </dependency>

        <dependency>
            <groupId>javax.xml.bind</groupId>
            <artifactId>jaxb-api</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.49</version>
        </dependency>


        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>angularjs</artifactId>
            <version>1.8.0</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
            <version>2.3.1.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-dbcp</artifactId>
            <version>9.0.1</version>
        </dependency>

        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>2.0.1.Final</version>
        </dependency>

        <dependency>
            <groupId>javax.transaction</groupId>
            <artifactId>javax.transaction-api</artifactId>
            <scope>compile</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-cache</artifactId>
            <version>2.3.1.RELEASE</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

我尝试删除Tomcat 并重新启动，但它得到了同样的错误。请问这个风景有什么切实可行的解决方案吗？

【问题讨论】：

大家好，早上好。我仍在尝试正确运行 Spring Boot，但它无法正常工作。 :(请有志愿者帮助我吗？我将不胜感激！:)
您提供的信息很难帮助您。此应用程序是否部署为与同一实例中的其他应用程序在 tomcat 上的战争？这是什么 Spring Boot 版本？
@StephaneNicoll 也许 pom.xml 可以为您提供更多帮助。我对此进行了编辑。对不起，如果我以一种奇怪的方式解释，我是那个工具的新手。 :P
pom 中存在许多问题，但没有一个可以解释您遇到的问题。您不应该覆盖所有这些版本，因为它们是由 Spring Boot 提供的。您在同一个项目中混合了两个不同的 Spring Boot 版本。如果没有我们需要的信息，我们将无法有效地帮助您。您能否在 GitHub 存储库上分享一个展示该问题的小示例？它不一定是你的应用，只是一个小样本。
当然，@StephaneNicoll，请稍等。

标签： spring-boot jmx

【解决方案1】：

Intellij IDEA 中的版本之间存在冲突，从 2020.1.2 到 2020.1.4。所以我决定更新最新版本，它可以正确修复 JMX。 @Stephane Nicoll 非常感谢您的耐心等待，对于这一天给您带来的不便，我深表歉意。从西班牙向比利时致以最诚挚的问候。

【讨论】：

@Stephane Nicoll 早上好。为了公司的隐私，我必须删除存储库。我希望在将 Spring Boot 链接到不同的 IDE 时考虑到这类问题。再次感谢您的帮助！ :)