[SOLR-8347] Asynchronous searcher for custom component

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Not A Problem
• Component/s: SearchComponents - other
• Assignee: Unassigned
• Reporter: Bogdan Marinescu
• Created: 27/Nov/15 11:14
• Updated: 03/Dec/15 15:03
• Resolved: 03/Dec/15 15:03

Description

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

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)

Is there a way of locking the IndexReader so it doesn't get closed by other threads?