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https://issues.apache.org/jira/browse/SOLR-5095?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13725020#comment-13725020
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Alan Woodward commented on SOLR-5095:
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Possibly related: https://issues.apache.org/jira/browse/SOLR-4735
> SolrCore.infoRegistry needs overhauled with some form of "namespacing"
> ----------------------------------------------------------------------
>
> Key: SOLR-5095
> URL: https://issues.apache.org/jira/browse/SOLR-5095
> Project: Solr
> Issue Type: Bug
> Reporter: Hoss Man
> Attachments: SOLR-5095_bug_demo.patch
>
>
> While investigating SOLR-3616 / SOLR-2715, I realized the failure i was
> seeing didn't seem to be related to the initial report of that bug, and
> instead seemed to be due to an obvious and fundemental limitation in the way
> SolrCore keeps track of "plugins" using the infoRegistry: It's just a
> {{Map<String, SolrInfoMBean>}} keyed off of the name of the plugin, but there
> is not "namespacing" used in the infoRegistry, so two completley different
> types of plugins with the same name will overwrite each other.
> When looking at data using something like /admin/mbeans, this manifests
> itself solely as missing objects: last one .put() into the infoRegistry
> "wins" -- using JMX, both objects are actually visible because of how JMX
> ObjectNames are built arround a set of key=val pairs, and a bug in how
> JmxMonitorMap unregisters existing MBeans when .put() is called on a key it
> already knows about (the unregister call is made using an ObjectName built
> using the infoBean passed to the put() call -- if infoBean.getName() is not
> exactly the same as the previous infoBean put() with the same key, then the
> MbeanServer will continue to know about both of them)
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