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https://issues.apache.org/jira/browse/SOLR-7876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14662397#comment-14662397
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Yonik Seeley commented on SOLR-7876:
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I tried implementing something that would use a different reader when a timeout
isn't needed on a per-query basis, but I ran into issues
>From TermQuery / TermWeight:
{code}
assert termStates.topReaderContext ==
ReaderUtil.getTopLevelContext(context) : "The top-reader used to create Weight
(" + termStates.topReaderContext + ") is not the same as the current reader's
top-reader (" + ReaderUtil.getTopLevelContext(context);
{code}
createWeight takes a searcher, and the TermWeight implementation remembers the
top reader context from that searcher, later comparing it against the readers
used for scoring.
> Support disabling ExitableDirectory wrapper when not needed
> -----------------------------------------------------------
>
> Key: SOLR-7876
> URL: https://issues.apache.org/jira/browse/SOLR-7876
> Project: Solr
> Issue Type: Bug
> Affects Versions: 5.0, 5.1, 5.2, 5.2.1
> Reporter: Tomás Fernández Löbbe
> Fix For: 5.3
>
>
> ExitableDirectoryReader can cause some overhead in Solr for some use cases,
> even when not really used. There should be a way of not using it when not
> needed.
> See http://search-lucene.com/m/l6pAi1HLrodLhNUd
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