Intel Xserve kernel errors

Question

when I use java threats on intel Xserve cause this a kernel panic (interlock timeout for mutex)
I can reproduce Is problem with a simple java script ( see below)
Has anybody the same problem or a solution for this problem ?
how to test
save script as MutexSimulator.java and run
# javac MutexSimulator.java
# java MutexSimulator
result : the server gives a kernel error.. and reboots
public class MutexSimulator implements Runnable
public static int nSimultaneousProcs = 0;
protected Thread runner;
MutexSimulator()
nSimultaneousProcs++;
runner = new Thread(this);
runner.start();
public void run()
try
Runtime rt = Runtime.getRuntime();
Process p = null;
try
p = rt.exec(new String[]{"ls","-al","/"});
p.waitFor();
catch(Exception e)
System.err.println("Exception "+e.getMessage());
if(p!=null)
p.destroy();
catch(Exception e)
System.err.println("Exception "+e.getMessage());
nSimultaneousProcs--;
public static void main(String [] args)
int nProcsInQueue = 0;
while(true)
if(MutexSimulator.nSimultaneousProcs<200)
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
try
Thread.sleep(50);
} catch (InterruptedException e)
System.err.println("Exception "+e.getMessage());
//System.out.println("Running "MutexSimulator.nSimultaneousProcs" processes.");
public class MutexSimulator implements Runnable
public static int nSimultaneousProcs = 0;
protected Thread runner;
MutexSimulator()
nSimultaneousProcs++;
runner = new Thread(this);
runner.start();
public void run()
try
Runtime rt = Runtime.getRuntime();
Process p = null;
try
p = rt.exec(new String[]{"ls","-al","/"});
p.waitFor();
catch(Exception e)
System.err.println("Exception "+e.getMessage());
if(p!=null)
p.destroy();
catch(Exception e)
System.err.println("Exception "+e.getMessage());
nSimultaneousProcs--;
public static void main(String [] args)
int nProcsInQueue = 0;
while(true)
if(MutexSimulator.nSimultaneousProcs<200)
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
new MutexSimulator();
try
Thread.sleep(50);
} catch (InterruptedException e)
System.err.println("Exception "+e.getMessage());
//System.out.println("Running "MutexSimulator.nSimultaneousProcs" processes.");
}

Answer 1

While I have found a few problems as well, I have gotten the intel xserve fairly stable (it did take a while and a lot of apple support calling)
I haven't had kernal panics, but I haven't been able to get the processors above 45% when doing compression. Also, I had some nasty lun masking problems with the fibre card which did result in corrpution of a HFS raid volume.
On the topic of xsan and the intel xserve, it is a BAD idea to try to install anything prior to 1.4.0. Had hangs, crashes and even corruption of the serial licensing daemon. Installing 1.4 and upgrading to 1.4.1 was a huge fix to those issues.
Overall, after a lot of work, it is working well, and does play back 100MB/s video extremely well off an xsan volume. Although, I would be fully content if I could get compressor's utilization of the CPU from 40 to 100%.