[jira] [Commented] (LUCENE-5023) Only reader that contains fields can be added into readerContext

["Bao Yang Yang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-5023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13672298#comment-13672298 ] 

Bao Yang Yang commented on LUCENE-5023:
---------------------------------------

thank you for your quick response, this is exactly what I mean. 
                
> Only reader that contains fields can be added into readerContext
> ----------------------------------------------------------------
>
>                 Key: LUCENE-5023
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5023
>             Project: Lucene - Core
>          Issue Type: Bug
>    Affects Versions: 4.2
>            Reporter: Bao Yang Yang
>            Assignee: Uwe Schindler
>            Priority: Critical
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> When there is only Segements in solr core, which means no any indexes, in CompositeReaderContext.build() method, the atomicReader that has no fields returned should not be added into leaves. Otherwise, in SolrIndexSearcher.getDocSetNC(Query query, DocSet filter), when execute line fields.terms(t.field()), a nullpointerexception will occur since fields variable is null.

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