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Posted to java-dev@axis.apache.org by "Davanum Srinivas (JIRA)" <ax...@ws.apache.org> on 2005/04/22 00:06:28 UTC

[jira] Resolved: (AXIS-1943) ID dups with FastUUIDGen

     [ http://issues.apache.org/jira/browse/AXIS-1943?page=all ]
     
Davanum Srinivas resolved AXIS-1943:
------------------------------------

    Resolution: Fixed

Applied patch. (http://marc.theaimsgroup.com/?l=axis-dev&m=111405036422574&w=2)

thanks.
-- dims

> ID dups with FastUUIDGen
> ------------------------
>
>          Key: AXIS-1943
>          URL: http://issues.apache.org/jira/browse/AXIS-1943
>      Project: Axis
>         Type: Bug
>     Versions: current (nightly)
>  Environment: IA-32 PC, GNU/Linux, Fedora Core 3, kernel 2.6.11-1.14_FC3, JDK 1.4.2_06-b03
>     Reporter: M Kisimoto
>     Priority: Minor
>  Attachments: patch.txt
>
> org.apache.axis.components.uuid.FastUUIDGen
> generates (probabilistic) duplicated IDs.
> The definition
> (http://www.opengroup.org/onlinepubs/9629399/apdxa.htm#tagcjh_20_02_01)
> claims to increment sequence, but FastUUIDGen uses
> random numbers to update. Because birthday paradox
> (http://en.wikipedia.org/wiki/Birthday_paradox),
> this cause relatively (very) high possibility of
> duplication.
> I'll attach fix patch.

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