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https://issues.apache.org/jira/browse/SOLR-3015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13183742#comment-13183742
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Karl Wright edited comment on SOLR-3015 at 1/11/12 12:40 AM:
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Making it possible for a QParserPlugin to be SolrCoreAware seems to work fine.
But one other thing that happens that is a bit of a surprise is that TWO copies
of the QParserPlugin class are created. So I get two sets of resources
allocated, and two freed. This is for lucene/solr trunk; haven't tried this
diagnostic for 3.x yet. I was able to verify that SearchComponents behave in
exactly the same way, though, so this is not related to QParserPlugins per se.
was (Author: [email protected]):
Making it possible for a QParserPlugin to be SolrCoreAware seems to work
fine. But one other thing that happens that is a bit of a surprise is that TWO
copies of the QParserPlugin class are created. So I get two sets of resources
allocated, and two freed. This is for lucene/solr trunk; haven't tried this
diagnostic for 3.x yet.
> CloseHook cannot be used with QParserPlugins
> --------------------------------------------
>
> Key: SOLR-3015
> URL: https://issues.apache.org/jira/browse/SOLR-3015
> Project: Solr
> Issue Type: Bug
> Reporter: Karl Wright
> Labels: closehook, qparserplugin, solrcoreaware
> Attachments: SOLR-3015.patch
>
>
> For some kinds of plugins, the CloseHook API works well to allow the plugin
> to clean up any resources it was using prior to Solr shutdown. But for
> QParserPlugins, CloseHook does not work; you get an error if you try to use
> it. This occurs because the 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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