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https://issues.apache.org/jira/browse/AMQ-4247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13546725#comment-13546725
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Dejan Bosanac commented on AMQ-4247:
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Hi Lionel,
I can reproduce this. What are you trying to access at j4p? There's a brief
explanation how to access ActiveMQ MBean information using Jolokia here
http://activemq.apache.org/rest.html#REST-RestManagement
For more info on url syntax, take a look at Jolokia manual.
> Jolokia error in latest 5.8 snapshot
> ------------------------------------
>
> Key: AMQ-4247
> URL: https://issues.apache.org/jira/browse/AMQ-4247
> Project: ActiveMQ
> Issue Type: Bug
> Environment: activemq-5.8-20130105.031543-65
> Reporter: Lionel Cons
>
> Using the latest ActiveMQ 5.8 snapshot, I'm getting errors when trying to
> access /j4p:
> HTTP ERROR 503
> Problem accessing /j4p/. Reason:
> java.lang.IllegalStateException: Cannot load extractor
> org.jolokia.converter.json.simplifier.ClassSimplifier defined in
> jar:file:/usr/activemq/lib/web/jolokia-core-1.0.6.jar!/META-INF/simplifiers-default
> : java.lang.ClassCastException:
> org.jolokia.converter.json.simplifier.ClassSimplifier cannot be cast to
> org.jmx4perl.converter.json.Extractor. Aborting
> Is this a known problem? Is there any documentation on how to use and/or
> configure Jolokia with ActiveMQ?
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