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Posted to dev@jmeter.apache.org by Philippe Mouawad <p....@ubik-ingenierie.com> on 2016/01/25 22:53:14 UTC
Issue in ThreadLocalRandom due to Java Bug JDK-7051516 :
ThreadLocalRandom seed is never initialized so all instances generate the
same sequence
For info
---------- Forwarded message ----------
From: vdaburon <no...@github.com>
Date: Thu, Jan 21, 2016 at 9:51 PM
Subject: Re: [jmeter] Bug 54453 - Performance enhancements : Replace Random
by ThreadLocalRandom (b969ff4)
To: apache/jmeter <jm...@noreply.github.com>
Cc: Philippe M <p....@ubik-ingenierie.com>
Hi,
This modification was not a good idea for jdk 7 because the
ThreadLocalRandom had bugs
http://bugs.java.com/bugdatabase/view_bug.do?bug_id=7051516
JDK-7051516 : ThreadLocalRandom seed is never initialized so all instances
generate the same sequence
May you need to check the jdk version 7 or 8 before choose the
ThreadLocalRandom or not ?
Regards.
Vincent D.
—
Reply to this email directly or view it on GitHub
<https://github.com/apache/jmeter/commit/b969ff4ed9fdc509c32fc09b95732ed137060139#commitcomment-15597343>
.
Re: Issue in ThreadLocalRandom due to Java Bug JDK-7051516 :
ThreadLocalRandom seed is never initialized so all instances generate the
same sequence
Posted by sebb <se...@gmail.com>.
On 25 January 2016 at 22:06, Philippe Mouawad
<p....@ubik-ingenierie.com> wrote:
> I don't think it was a bad idea, JMeter evolution should not be stopped by
> a particular bug in a particular (old) version of Java fixed in a newer
> version.
Agreed.
Only if the bug is not fixed for a long time should we perhaps
consider a work-round for JMeter.
> Regarding this issue, are you sure the bug is not fixed even in Java7 since
> 7u2 ?
>
> -
> http://www.oracle.com/technetwork/java/javase/2col/7u2bugfixes-1394661.html
>
> Regards
>
> Philippe
>
> On Mon, Jan 25, 2016 at 10:53 PM, Philippe Mouawad <
> p.mouawad@ubik-ingenierie.com> wrote:
>
>> For info
>> ---------- Forwarded message ----------
>> From: vdaburon <no...@github.com>
>> Date: Thu, Jan 21, 2016 at 9:51 PM
>> Subject: Re: [jmeter] Bug 54453 - Performance enhancements : Replace
>> Random by ThreadLocalRandom (b969ff4)
>> To: apache/jmeter <jm...@noreply.github.com>
>> Cc: Philippe M <p....@ubik-ingenierie.com>
>>
>>
>> Hi,
>> This modification was not a good idea for jdk 7 because the
>> ThreadLocalRandom had bugs
>> http://bugs.java.com/bugdatabase/view_bug.do?bug_id=7051516
>> JDK-7051516 : ThreadLocalRandom seed is never initialized so all instances
>> generate the same sequence
>>
>> May you need to check the jdk version 7 or 8 before choose the
>> ThreadLocalRandom or not ?
>>
>> Regards.
>> Vincent D.
>>
>> —
>> Reply to this email directly or view it on GitHub
>> <https://github.com/apache/jmeter/commit/b969ff4ed9fdc509c32fc09b95732ed137060139#commitcomment-15597343>
>> .
>>
>>
>
>
> --
> Cordialement.
> Philippe Mouawad.
> Ubik-Ingénierie
>
> UBIK LOAD PACK Web Site <http://www.ubikloadpack.com/>
>
> UBIK LOAD PACK on TWITTER <https://twitter.com/ubikloadpack>
Re: Issue in ThreadLocalRandom due to Java Bug JDK-7051516 :
ThreadLocalRandom seed is never initialized so all instances generate the
same sequence
Posted by Philippe Mouawad <p....@ubik-ingenierie.com>.
I don't think it was a bad idea, JMeter evolution should not be stopped by
a particular bug in a particular (old) version of Java fixed in a newer
version.
Regarding this issue, are you sure the bug is not fixed even in Java7 since
7u2 ?
-
http://www.oracle.com/technetwork/java/javase/2col/7u2bugfixes-1394661.html
Regards
Philippe
On Mon, Jan 25, 2016 at 10:53 PM, Philippe Mouawad <
p.mouawad@ubik-ingenierie.com> wrote:
> For info
> ---------- Forwarded message ----------
> From: vdaburon <no...@github.com>
> Date: Thu, Jan 21, 2016 at 9:51 PM
> Subject: Re: [jmeter] Bug 54453 - Performance enhancements : Replace
> Random by ThreadLocalRandom (b969ff4)
> To: apache/jmeter <jm...@noreply.github.com>
> Cc: Philippe M <p....@ubik-ingenierie.com>
>
>
> Hi,
> This modification was not a good idea for jdk 7 because the
> ThreadLocalRandom had bugs
> http://bugs.java.com/bugdatabase/view_bug.do?bug_id=7051516
> JDK-7051516 : ThreadLocalRandom seed is never initialized so all instances
> generate the same sequence
>
> May you need to check the jdk version 7 or 8 before choose the
> ThreadLocalRandom or not ?
>
> Regards.
> Vincent D.
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/apache/jmeter/commit/b969ff4ed9fdc509c32fc09b95732ed137060139#commitcomment-15597343>
> .
>
>
--
Cordialement.
Philippe Mouawad.
Ubik-Ingénierie
UBIK LOAD PACK Web Site <http://www.ubikloadpack.com/>
UBIK LOAD PACK on TWITTER <https://twitter.com/ubikloadpack>