Andrew Mashenkov created IGNITE-5986:
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             Summary: 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
             Fix For: 2.2


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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