[jira] [Comment Edited] (MATH-899) A random crash of MersenneTwister random generator

["Thomas Neidhart (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MATH-899?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13499869#comment-13499869 ] 

Thomas Neidhart edited comment on MATH-899 at 11/18/12 6:35 PM:
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You could and should provide a test that shows that the wrapper provides the same result as a wrapped RandomGenerator (using the same seed), imho.
                
      was (Author: tn):
    You could and should provide a test that shows that wrapper provides the same result as a RandomGenerator (using the same seed), imho.
                  
> A random crash of MersenneTwister random generator
> --------------------------------------------------
>
>                 Key: MATH-899
>                 URL: https://issues.apache.org/jira/browse/MATH-899
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.0
>         Environment: Windows 7, JDK 1.7.05
>            Reporter: Alexander Nozik
>            Priority: Minor
>         Attachments: SynchronizedRandomGenerator.java, SynchronizedRandomGeneratorTest.java
>
>
> There is a very small probability that MersenneTwister generator gives a following error: 
> java.lang.ArrayIndexOutOfBoundsException: 624
> in MersenneTwister.java line 253
> The error is completely random and its probability is about 1e-8.
> UPD: The problem most probably arises only in multy-thread mode.

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