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  1. Confluence Data Center
  2. CONFSERVER-11555

JMX registration of MailServer can fail if the MBean already exists

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    Description

      Confluence prints the following error when starting up:

      SEVERE: Exception starting filter jmx
    org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to register MBean
    [com.atlassian.confluence.jmx.JmxSMTPMailServer@199ec67[id=1208645280823,name=SMTP Server,description=<null>,
    server name=<null>,username=confluence@veil.org.ua,password=qwerty,isSessionServer=true,
    defaultFrom=confluence@veil.org.ua,prefix=[confluence],smtpPort=465]] with object name 
    [Confluence:name=MailServer-SMTP Server]; nested exception is javax.management.InstanceAlreadyExistsException:
    Confluence:name=MailServer-SMTP Server
Caused by: javax.management.InstanceAlreadyExistsException: Confluence:name=MailServer-SMTP Server
at com.sun.jmx.mbeanserver.Repository.addMBean(Unknown Source)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.internal_addObject(Unknown Source)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(Unknown Source)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(Unknown Source)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(Unknown Source)
at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(Unknown Source)
at org.springframework.jmx.support.MBeanRegistrationSupport.doRegister(MBeanRegistrationSupport.java:162)
at org.springframework.jmx.export.MBeanExporter.registerManagedResource(MBeanExporter.java:431)
at com.atlassian.confluence.jmx.MBeanExporterWithUnregisterImpl.registerManagedResource(MBeanExporterWithUnregisterImpl.java:93)
at com.atlassian.confluence.jmx.JmxFilter.registerObject(JmxFilter.java:164)
at com.atlassian.confluence.jmx.JmxFilter.doMailServer(JmxFilter.java:87)
at com.atlassian.confluence.jmx.JmxFilter.registerBeans(JmxFilter.java:63)
at com.atlassian.confluence.jmx.JmxFilter.init(JmxFilter.java:42)

      There are two issues to consider here:

      1) Why does the MBean already exist? It should not be registered twice during startup.

      2) If it does exist, we probably shouldn't stop the entire application from starting up. The existence should be checked before registration and it should recover from this error gracefully.

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          is related to

          Bug - A problem which impairs or prevents the functions of the product. CONFSERVER-16217 JMX deregistration of MailServer can fail if the MBean doesn't exist

          • Medium - Medium priority issues
          • Gathering Impact
          supersedes

          Bug - A problem which impairs or prevents the functions of the product. CONFSERVER-11534 Couldn't start confluence

          • Medium - Medium priority issues
          • Closed

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              bnguyen Brian Nguyen (Inactive)
              alynch Andrew Lynch (Inactive)
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                Created:
                Updated:
                Resolved: