GitHub user laimis opened a pull request:

    https://github.com/apache/lucenenet/pull/140

    use proper random.next

    Occasionally tests TestConcurrentReads fail with expected hit 1 but getting 
back 0. The issue is that the field values being added to the document are 0 to 
numDocs - 1 and the random queries are generated using 0 to numDocs. So if 
random hits the numDocs value, that document is not in the index and test 
fails. Adjusted test to match what Lucene is doing:
    
    
https://github.com/apache/lucene-solr/blob/lucene_solr_4_8_0/lucene/test-framework/src/java/org/apache/lucene/index/BaseStoredFieldsFormatTestCase.java#L439

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/laimis/lucenenet nextrand_fix

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/lucenenet/pull/140.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #140
    
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commit b22388e19134b1d263cf3aa702f63e7f35a62d8f
Author: Laimonas Simutis <[email protected]>
Date:   2015-05-05T01:50:00Z

    use proper random.next

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