[ 
https://issues.apache.org/jira/browse/SOLR-8347?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Upayavira resolved SOLR-8347.
-----------------------------
    Resolution: Not A Problem

As I said, please ask this question on the Solr user mailing list, where 
hopefully you will find the help you are looking for. I am not aware of any 
conscious attempt to support threading within a single search request, thus 
this is *not* an issue for Solr, so it cannot be considered a bug. Please 
discuss it on the user list, and only bring it here if the discussion concludes 
some development is needed. Marking this issue as resolved, for now.

> Asynchronous searcher for custom component
> ------------------------------------------
>
>                 Key: SOLR-8347
>                 URL: https://issues.apache.org/jira/browse/SOLR-8347
>             Project: Solr
>          Issue Type: Bug
>          Components: SearchComponents - other
>            Reporter: Bogdan Marinescu
>            Priority: Critical
>
> I'm trying to write a custom component for fuzzy searches. 
> After solr calls my component, I create a Thread and give it the 
> SolrIndexSearcher and some params.
> Problem is after a few seconds I get an Exception that the indexreader was 
> closed 
> {code}
> org.apache.lucene.store.AlreadyClosedException: this IndexReader cannot be 
> used anymore as one of its child readers was closed
>         at 
> org.apache.lucene.index.IndexReader.ensureOpen(IndexReader.java:279)
>         at 
> org.apache.lucene.index.FilterLeafReader.getLiveDocs(FilterLeafReader.java:374)
>         at 
> org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:768)
>         at 
> org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:485)
>         at 
> org.apache.solr.search.SolrIndexSearcher.buildAndRunCollectorChain(SolrIndexSearcher.java:202)
>         at 
> org.apache.solr.search.SolrIndexSearcher.getDocListNC(SolrIndexSearcher.java:1666)
>         at 
> org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1485)
>         at 
> org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:561)
>         at 
> org.apache.solr.search.SolrIndexSearcher.getDocList(SolrIndexSearcher.java:1350)
>         at 
> awinta.mdm.solr.components.FuzzyLikeThisComponent$FLTHelper.getLikeThis(FuzzyLikeThisComponent.java:336)
>         at 
> awinta.mdm.solr.components.FLTWorker.getLikeThese(FLTWorker.java:161)
>         at awinta.mdm.solr.components.FLTWorker.call(FLTWorker.java:94)
>         at awinta.mdm.solr.components.FLTWorker.call(FLTWorker.java:35)
>         at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>         at java.lang.Thread.run(Thread.java:745)
> {code}
> Is there a way of locking the IndexReader so it doesn't get closed by other 
> threads? 



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