Some more information on my signal handler problem. At this point I can't
put my finger on whether it's my application, the kernel, or something
else. It seems to randomly work (and not very often).
It seemed to work with my SMP kernel when I saw this:
Unknown HZ value! (93) Assume 100.
Which I noted on google groups could be caused by SMP, so I tried a
non-SMP kernel, to no avail. Then, I dug deeper, upgraded my version of
"procps" to a later version, and tried again. No luck with the signals,
but the "Unknown HZ" message went away. I'm really not sure if that's
related or not.
I suspected it was something in my application that was tripping the
signal to not work, but over the course of the last hour, I have
discovered that is not necessarily the case. It seems to sporadically
work no matter what I change in the kernel, what message I see on the
screen, or what argument I pass to the JVM.
I added the command line argument:
-XX:+AllowUserSignalHandlers
which also did not help.
I will be constructing a basic application that just does the signal
handling similar to my application so I can use it to test.
Thanks,
-nicole
At 13:40 on Mar 11, nicole shook the earth with:
>
> Tony, Sebastien, List,
>
> At 09:10 on Mar 11, Tony Reix shook the earth with:
>
> > Hi Nicole,
> >
> > Would it be possible for you to extract the code that produces the
> > problem and provide a very small program we could use in our labs
> > in order to reproduce the problem with our environment (RedHat 9,
> > last 2.6 kernel version, last NPTL version) ?
>
> I will track down what actually triggers the problem and get you some test
> code, but probably not until early next week (traveling this weekend).
>
> The signal *does* work up until a point in my application initialization,
> I found. After a certain point, it just goes into a black hole. I'll
> figure out what that is and write up some test code.
>
> Thanks!
> -nicole
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