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https://issues.apache.org/jira/browse/SOLR-1730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12884078#action_12884078
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Grant Ingersoll commented on SOLR-1730:
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I don't understand why it needs to even do this, what benefit is there to the
QEC if it doesn't have an elevation file? Seems like it should just disable
itself or throw an exception and fail.
> Solr fails to start if QueryElevationComponent config is missing
> ----------------------------------------------------------------
>
> Key: SOLR-1730
> URL: https://issues.apache.org/jira/browse/SOLR-1730
> Project: Solr
> Issue Type: Bug
> Components: SearchComponents - other
> Affects Versions: 1.4
> Reporter: Mark Miller
> Fix For: Next
>
>
> QueryElevationComponent tries to do preload some data if its config file does
> not exist:
> {code}
> if (!exists){
> // preload the first data
> RefCounted<SolrIndexSearcher> searchHolder = null;
> try {
> searchHolder = core.getNewestSearcher(false);
> IndexReader reader = searchHolder.get().getReader();
> getElevationMap( reader, core );
> } finally {
> if (searchHolder != null) searchHolder.decref();
> }
> }
> {code}
> This does not work though, as asking for the newest searcher causes a request
> to be submitted to Solr before its ready to handle it:
> {code}
> [java] SEVERE: java.lang.NullPointerException
> [java] at
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:173)
> [java] at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:131)
> [java] at org.apache.solr.core.SolrCore.execute(SolrCore.java:1317)
> [java] at
> org.apache.solr.core.QuerySenderListener.newSearcher(QuerySenderListener.java:52)
> [java] at org.apache.solr.core.SolrCore$3.call(SolrCore.java:1147)
> [java] at
> java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> [java] at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> {code}
> The SearchHandler has not yet been core informed (as the
> QueryElevationComponent causes this as its getting core informed right before
> the SearchHandler) and so its components arraylist is still null.
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