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https://issues.apache.org/jira/browse/SOLR-3015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13183759#comment-13183759
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Hoss Man commented on SOLR-3015:
--------------------------------
bq. I wonder if this is a bug?
it sounds distinct from this issue, so yes please file a bug.
BTW: the backstory on why there are limitations on what can implement
SolrCoreAware can all be found in SOLR-414 ... the crux of hte issue is that
back when there was a SolrCore singleton, it was very easy to get into circular
init refrence hell of plugins trying to do things with the SolrCore before it
was fully initialized. even now with the SolrCoreAware interface being called
*after* all the plugins have been inited, we still have to watch out for the
possibility that one type of plugin (like a RequestHandler) might attempt to
use access another type of plugin (like a QParserPlugin) in it's own
MyRequestHandler.inform(SolrCore) before the QParserPlugin.inform(SolrCore)
method has been called.
There needs to be a really strong reason to add things to the SolrCoreAware
list, because every interface we add is another dimensional increase in the
risk of problems people might run into.
> QParserPlugins can not be SolrCoreAware
> ---------------------------------------
>
> Key: SOLR-3015
> URL: https://issues.apache.org/jira/browse/SOLR-3015
> Project: Solr
> Issue Type: New Feature
> Reporter: Karl Wright
> Labels: closehook, qparserplugin, solrcoreaware
> Attachments: SOLR-3015.patch
>
>
> QParserPlugin cannot be made SolrCoreAware:
> {code}
> [junit] org.apache.solr.common.SolrException: Invalid 'Aware' object:
> org.apache.solr.mcf.ManifoldCFQParserPlugin@18941f7 --
> org.apache.solr.util.plugin.SolrCoreAware must be an instance of:
> [org.apache.solr.request.SolrRequestHandler]
> [org.apache.solr.response.QueryResponseWriter]
> [org.apache.solr.handler.component.SearchComponent]
> [org.apache.solr.update.processor.UpdateRequestProcessorFactory]
> [org.apache.solr.handler.component.ShardHandlerFactory]
> {code}
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