Re: [uml-user] JDK1.5 CPU Problems

[John M F. <jo...@hj...>]

On Mon, Jan 10, 2005 at 05:33:30PM +1300, Peter wrote:
> I have some users running 1.5 Java VMs.  They run for a bit.  Then=20
> seem=20
> to get 'locked up'.
> The process maxes out the UML CPU.  They do not respond to a kill=20
> -3=20
> (which normally causes a Java stack trace to be output).  The=20
> process=20
> does not output anything when I strace it (after it locks up).
> This happens when the 1.5 JDK is used to start Tomcat.  And it has=20
> happened running other Java apps as well.  I don't see the problem=20
> with=20
> any non-Java apps.  The problem also happens with the Update 1=20
> release=20
> of the 1.5 JDK.
> I never see the problem with the 'old' 1.4.* releases.  I don't see=20
> any=20
> reports like this with JDK 1.5 users on non-UML systems.
> So I'm guessing there is a UML/JD1.5 interaction issue here=20
> somewhere.

i see the exact same problem with another uml provider (not rimu).
they're running 2.4.26-2um.  i'm running debian unstable on it.

my jboss 4 or 3 instances exhibit this same behavior when i run them=20
in jdk1.5.  starting the jvm with -Xint alleviates the problem, but=20
i'm pretty sure it's making the whole app run slower.

experimenting locally with the 2.4.26-3um-1 kernel that debian=20
packages, my entire machine locks and i need to kill the whole linux
process.

i don't know how to fix or debug it, either.  if anyone has any ideas,
i'd be happy to try them.
--=20
John M Flinchbaugh
jo...@hj...