Hi. Sorry about not posting the version info.
I'm seeing the problems on various kernels. UML kernels of 2.4.27 and 2.6.9-bb4 (which seems to work very well, btw). Skas kernels of 2.6.8.1 + skas3-v7.
The host and guest distro I've noticed this on are White Box Enterprise Linux 3. They report rpm -qa | grep glibc reports: glibc-common-2.3.2-95.30. I yhink I recall seeing the problem on a Debian UML instance, so it may be cross distro as well.
strace, as I mentioned, reports nothing.
I'm open to wild speculation as to a cause/fix here. Or suggestions on how else to find the problem. Maybe I could use gdb?
Paulo if you're interested I can set you up with an account so you can poke around/test.
Regards, Peter http://rimuhosting.com
Blaisorblade wrote:
On Monday 10 January 2005 05:33, Peter wrote:
I have some users running 1.5 Java VMs. They run for a bit. Then seem to get 'locked up'.
The process maxes out the UML CPU. They do not respond to a kill -3 (which normally causes a Java stack trace to be output). The process 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 happened running other Java apps as well. I don't see the problem with any non-Java apps. The problem also happens with the Update 1 release of the 1.5 JDK.
I never see the problem with the 'old' 1.4.* releases. I don't see any 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 somewhere.
Is anyone else seeing this issue? And can someone give me an idea of how to collect more information about this problem. Oh, and wild guesses at the cause of the problem are also invited :)
First post the host/guest kernel and glibc version, at least... running strace on the Java process may give more info.
Also, try running different UML releases, as 2.6.9-bb4.
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