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https://issues.apache.org/jira/browse/CASSANDRA-12869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eduard Tudenhoefner updated CASSANDRA-12869:
--------------------------------------------
Reproduced In: 3.x (was: 3.0.9)
> Don't load mx4j beans twice
> ---------------------------
>
> Key: CASSANDRA-12869
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12869
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Eduard Tudenhoefner
> Assignee: Eduard Tudenhoefner
>
> This happens on *cassandra-3.X* and *trunk* because there are two calls to
> {{Mx4jTool.maybeLoad()}}. I think this was an unintentional side-effect of
> CASSANDRA-12274
> {code}
> WARN [main] 2016-11-02 09:07:09,294 Mx4jTool.java:72 - Could not start
> register mbean in JMX
> javax.management.InstanceAlreadyExistsException: system:name=http
> at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:437)
> ~[na:1.8.0_91]
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1898)
> ~[na:1.8.0_91]
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:966)
> ~[na:1.8.0_91]
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:900)
> ~[na:1.8.0_91]
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:324)
> ~[na:1.8.0_91]
> at
> com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)
> ~[na:1.8.0_91]
> at org.apache.cassandra.utils.Mx4jTool.maybeLoad(Mx4jTool.java:55)
> ~[main/:na]
> at
> org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:414)
> [main/:na]
> at
> org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:603)
> [main/:na]
> at
> org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:737)
> [main/:na]
> {code}
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