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https://issues.apache.org/jira/browse/SOLR-3015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14146798#comment-14146798
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Ryan Josal commented on SOLR-3015:
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I ran into a problem with this today. I have a QParserPlugin that would like
to get some info from the index at startup, but without having it
SolrCoreAware, I can't getSolrConfig().getDataDir(). Having run into the
circular init problem before in the past, I understand the motive to reduce
risk of problems. On a related note, I have a SearchComponent that wants to
(but isn't allow to) be ResourceLoaderAware so it can load some data file from
the config dir. Interestingly, QParserPlugin CAN be ResourceLoaderAware. At
least with that one I can put the instanceDir in my config because that
property is automatically populated, but I can't work around the data.dir
problem that way because it is left blank. My personal feeling is that it
would be great if these artificial limitations could be safely lifted somehow.
> 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
> Fix For: 3.6, 4.0-ALPHA
>
> 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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