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https://issues.apache.org/jira/browse/SOLR-918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12658016#action_12658016
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Shalin Shekhar Mangar commented on SOLR-918:
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Alright. When JMX is enabled, it uses the JmxMonitoredMap which extends
ConcurrentHashMap so order is not maintained anyway. Let's stick with
ConcurrentHashMap, I'll scan through the code and remove all synchronization
during iteration and update the javadocs.
> Thread safety issue in SolrCore.infoRegistry
> --------------------------------------------
>
> Key: SOLR-918
> URL: https://issues.apache.org/jira/browse/SOLR-918
> Project: Solr
> Issue Type: Bug
> Reporter: Shalin Shekhar Mangar
> Assignee: Shalin Shekhar Mangar
> Priority: Minor
> Fix For: 1.4
>
> Attachments: SOLR-918.patch
>
>
> SolrCore.infoRegistry is used for keeping a reference to the SolrInfoMBean
> objects. When JMX is disabled, it is initialized to a LinkedHashMap which is
> not synchronized.
> We can change this to a ConcurrentHashMap instead of a LinkedHashMap.
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