Re: [ljc] JVM is messed up when system clock is rolled backward

From: matt f.
Sent on: Friday, September 6, 2013 1:09 PM
I'm not sure if this has already been covered but does this only occur when the change in time is of-the-order of an hour, or does it still occur with much smaller times (minutes, seconds or less)?


On Thu, Sep 5, 2013 at 7:45 PM, Bruno Bossola <[address removed]> wrote:
Hi all,

I just wanted to get you an update about the issue. I have been having few overnight discussions with the VM engineers with quite a lot of interesting points, you can get some insight on my blog.
A deep explanation of the issue:
http://bbossola.wordpress.com/2013/09/04/jvm-issue-concurrency-is-affected-by-changing-the-date-of-the-system/
A simple Pool written in java using a ReentrantLock that hangs:
http://bbossola.wordpress.com/2013/09/05/jvm-issue-concurrency-is-affected-by-changing-the-date-of-the-system-part-2/

This is where we are:
- the bug is now public
- the priority of the bug is P3
- a fix is being attempted for JDK8, with the opportunity to backport to 7, but there's no official commitment to fix this

I also just discovered that also Eclipse is affected by the issue :)

Will keep you posted.
Cheers,

    Bruno





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