Confluence doesn't start with JMX error

[Licensing User]

Confluence is failing with following error:

2020-05-08 09:10:31,371 ERROR [localhost-startStop-1] [ContainerBase.[Standalone].[localhost].[/]] log Exception starting filter [jmx]
javax.management.RuntimeOperationsException
	at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:413)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1898)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:966)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:900)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:324)
	at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)
	at org.springframework.jmx.support.MBeanRegistrationSupport.doRegister(MBeanRegistrationSupport.java:195)
	at org.springframework.jmx.export.MBeanExporter.registerManagedResource(MBeanExporter.java:486)
	at com.atlassian.confluence.jmx.MBeanExporterWithUnregisterImpl.registerManagedResource(MBeanExporterWithUnregisterImpl.java:125)
	at com.atlassian.confluence.jmx.MBeanExporterWithUnregisterImpl.safeRegisterManagedResource(MBeanExporterWithUnregisterImpl.java:116)
	at com.atlassian.confluence.jmx.JmxFilter.safeRegisterObject(JmxFilter.java:132)
	at com.atlassian.confluence.jmx.JmxFilter.doMailServer(JmxFilter.java:79)
	at com.atlassian.confluence.jmx.JmxFilter.registerBeans(JmxFilter.java:63)
	at com.atlassian.confluence.jmx.JmxFilter.init(JmxFilter.java:45)
	at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:270)
	at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:251)
	at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:102)
	at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4491)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5135)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1429)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalArgumentException: Repository: cannot add mbean for pattern name Confluence:name=MailServer-Proxy?

Using steps descrbes in https://confluence.atlassian.com/confkb/unable-to-start-confluence-due-to-jmx-182158269.html doesn't work - it fails with:

2020-05-11 11:51:39,031 ERROR [localhost-startStop-1] [springframework.web.context.ContextLoader] initWebApplicationContext Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'exporter' defined in class path resource [jmxContext.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'enabled' of bean class [com.atlassian.confluence.jmx.MBeanExporterWithUnregisterImpl]: Bean property 'enabled' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?

But when I use jmxContext.xml from source code of mine version confluence it gives initial error:

Caused by: java.lang.IllegalArgumentException: Repository: cannot add mbean for pattern name Confluence:name=MailServer-Proxy?

[Diego]

Hello @Licensing User !

As I understand, your Confluence Instance is not starting and a few errors are present in your log.

Looking at the error itself:

Caused by: java.lang.IllegalArgumentException: Repository: cannot add mbean for pattern name Confluence:name=MailServer-Proxy?

I am inclined to believe that there might something wrong with your mail server configuration.

I recommend that you start by looking into your jmxContext.xml file and check that everything is correctly typed there. Be sure to use a Plain text editor.

Also, when following the workaround from here:

• [Confluence Server] Unable to Start Confluence Due to JMX

Be sure to:

1. Back up your jmxContext.xml file
2. Shutdown Confluence completely
3. Be sure to place the file under <confluence-install>/confluence/WEB-INF/classes
4. Restart Tomcat

I also have a few questions about your instance! Here we go:

1. Was this instance working at some point in the past?
2. Was there any change applied to the instance?
3. Is there any other Atlassian application running on the same server?

Looking forward to your reply.