SpringBoot專案部署在同一個tomcat容器報錯

在一個Tomcat容器中部署了兩個springboot的應用，在啟動時發現一直都是第一個啟動的專案能啟動成功，第二個專案啟動報錯，錯誤資訊如下：

2018-01-30 15:49:27.810 ERROR 7534 --- [ost-startStop-1] o.s.boot.SpringApplication               : Application startup failed

org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to
 
 register MBean [{
        CreateTime:"2018-01-30 15:49:24",
        ActiveCount:0,
        PoolingCount:0,
        CreateCount:0,
        DestroyCount:0,
        CloseCount:0,
        ConnectCount:0,
        Connections:[
        ]
}] with key 'dataSource'; nested exception is javax.management.InstanceAlreadyExistsException: com.alibaba.druid.pool:name
 
=dataSource,type=DruidDataSource
        at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:628) ~[spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.springframework.jmx.export.MBeanExporter.registerBeans(MBeanExporter.java:550) ~[spring-context-4.3
 
.10.RELEASE.jar:4.3.10.RELEASE]
        at org.springframework.jmx.export.MBeanExporter.afterSingletonsInstantiated(MBeanExporter.java:432) ~[spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:781) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) ~[spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) ~[spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) ~[spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
        at org.springframework.boot.web.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:151) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
        at org.springframework.boot.web.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:131) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
        at org.springframework.boot.web.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:86) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
        at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:169) [spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5621) [catalina.jar:7.0.84]
        at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:169) [spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5621) [catalina.jar:7.0.84]
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) [catalina.jar:7.0.84]
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:1015) [catalina.jar:7.0.84]
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:991) [catalina.jar:7.0.84]
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652) [catalina.jar:7.0.84]
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1296) [catalina.jar:7.0.84]
        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:2038) [catalina.jar:7.0.84]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [na:1.7.0_55]
        at java.util.concurrent.FutureTask.run(FutureTask.java:262) [na:1.7.0_55]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_55]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_55]
        at java.lang.Thread.run(Thread.java:745) [na:1.7.0_55]
Caused by: javax.management.InstanceAlreadyExistsException: com.alibaba.druid.pool:name=dataSource,type=DruidDataSource
        at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:437) ~[na:1.7.0_55]
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1898) ~[na:1.7.0_55]
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:966) ~[na:1.7.0_55]
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:900) ~[na:1.7.0_55]
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:324) ~[na:1.7.0_55]
        at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522) ~[na:1.7.0_55]
        at org.springframework.jmx.support.MBeanRegistrationSupport.doRegister(MBeanRegistrationSupport.java:195) ~[spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.springframework.jmx.export.MBeanExporter.registerBeanInstance(MBeanExporter.java:674) ~[spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:618) ~[spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        ... 25 common frames omitted

因此在專案的application.yml檔案中新增如下配置即可：

• proj01
  spring.jmx.default-domain=proj01
• proj02
  spring.jmx.default-domain=proj02

配置成不一樣的，再啟動即可啟動成功。