users@grizzly.java.net

Re: Comet - growing CPU usage

From: Jeanfrancois Arcand <Jeanfrancois.Arcand_at_Sun.COM>
Date: Fri, 12 Jun 2009 16:13:51 -0400

Salut,

FredrikJ wrote:
> Short update, I have tested the application on a different setup and when
> running on Windows XP, single core CPU, jdk 1.6_u13, Grizzly patch 1.0.29
> with moderate load, the CPU issue is not observed.
>
> Thus it seems like the issue may be correlated to specific hardware/jdk etc.
> and I think we need to pinpoint this better on our side before moving on. I
> will try to get some time to make an isolated version of the application
> (without the business end of it) that can trigger the behavior. The 1.0.29
> patch certainly fixed the worst initial CPU leak though.
>
> I am not sure what to do about the deadlock, or if to do anything at all...
> Even if we get a fix backported, it will not be guaranteed anyway since we
> have no way of reliably reproduce the deadlock. I think we might have to run
> our application long term and see how frequent (if at all) we can reproduce
> it before making any decisions.

OK. I'm working on the backport anyway as the OpenESB team asked the
same fix :-)

Thanks!

-- Jeanfrancois


>
>
>
>