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https://issues.apache.org/jira/browse/IGNITE-5986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16120175#comment-16120175
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Andrew Mashenkov commented on IGNITE-5986:
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Queries with leading wildcard was disabled by default in one of 4.x Lucene
version.
Fix bug when indexReader wasn't closed properly if query parsing throws
exception.
> Fix failed test in .NET suite.
> ------------------------------
>
> Key: IGNITE-5986
> URL: https://issues.apache.org/jira/browse/IGNITE-5986
> Project: Ignite
> Issue Type: Test
> Components: cache, platforms
> Affects Versions: 2.1
> Reporter: Andrew Mashenkov
> Assignee: Andrew Mashenkov
> Labels: MakeTeamcityGreenAgain
> Fix For: 2.2
>
> Attachments: Fix_Lucene_index_closing_bug_.patch, ignite.log
>
>
> Preface:
> I've found we use closeQuiet() method in LuceneIndex.close() that suppress
> exceptions.
> So, this is why we have no issues here before.
> I'd think when index is closing, it is expected that all queries being
> cancelled and at the moment all QueryCursors (which use IndexReaders) has
> been closed already.
> But I' observe it is not true in some cases.
> Looking at GridCacheProcessor.stopCache() method we call onCacheStop()->
> unregisterCache -> table.onDrop() -> luceneIdx.close().
> Looks like someone forget to close Cursor or\and Cursor wasn't closed during
> query cancelation.
> We have to investigate this and
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