[jira] [Created] (LUCENE-3991) Random shared by threads in RandomIndexWriter and MockAnalyzer

["Dawid Weiss (Created) (JIRA)" <ji...@apache.org>]

Random shared by threads in RandomIndexWriter and MockAnalyzer
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                 Key: LUCENE-3991
                 URL: https://issues.apache.org/jira/browse/LUCENE-3991
             Project: Lucene - Java
          Issue Type: Task
            Reporter: Dawid Weiss
            Priority: Minor


This is currently patched by creating a non-asserting Random like this:
{code}
    public MockIndexWriter(Random r, Directory dir, IndexWriterConfig conf) throws IOException {
      super(dir, conf);
      // TODO: this should be solved in a different way; Random should not be shared (!).
      this.r = new Random(r.nextLong());
    }
{code}
and
{code}
  public MockAnalyzer(Random random, CharacterRunAutomaton runAutomaton, boolean lowerCase, CharacterRunAutomaton filter, boolean enablePositionIncrements) {
    super(new PerFieldReuseStrategy());
    // TODO: this should be solved in a different way; Random should not be shared (!).
    this.random = new Random(random.nextLong());
{code}

If you replace new Random(...) with a simple assignment you'll get errors indicating the Random instance is shared (or passed between threads). I don't know how to fix it so I left it as it was before.


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