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https://issues.apache.org/jira/browse/SOLR-5108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13745090#comment-13745090
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ASF subversion and git services commented on SOLR-5108:
-------------------------------------------------------
Commit 1515852 from [email protected] in branch 'dev/trunk'
[ https://svn.apache.org/r1515852 ]
SOLR-5108: fail plugin info loading if multiple instances exist but only one is
expected
> plugin loading should fail if mor then one instance of a singleton plugin is
> found
> ----------------------------------------------------------------------------------
>
> Key: SOLR-5108
> URL: https://issues.apache.org/jira/browse/SOLR-5108
> Project: Solr
> Issue Type: Bug
> Reporter: Hoss Man
> Assignee: Hoss Man
> Attachments: SOLR-5108.patch
>
>
> Continuing from the config parsing/validation work done in SOLR-4953, we
> should improve SolrConfig so that parsing fails if multiple instances of a
> "plugin" are found for types of plugins where only one is allowed to be used
> at a time.
> at the moment, {{SolrConfig.loadPluginInfo}} happily initializes a
> {{List<PluginInfo>}} for whatever xpath it's given, and then later code can
> either call {{List<PluginInfo> getPluginInfos(String)}} or {{PluginInfo
> getPluginInfo(String)}} (the later just being shorthand for getting the first
> item in the list.
> we could make {{getPluginInfo(String)}} throw an error if the list has
> multiple items, but i think we should also change the signature of
> {{loadPluginInfo}} to be explicit about how many instances we expect to find,
> so we can error earlier, and have a redundant check.
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