Hi Chris,
It is a DesktopApplication. I'm having trouble running applets because
of Java browser plugin installation issues, so I can't tell if
ComponentExplorer or KitchenSink works or not. I have a smaller Pivot
desktop app that seems to run fine, but it doesn't have a lot of the
interaction of our main app (no right-click menus, no tree view, etc.).
I can't (yet) run our application from a browser, so I can't tell if
that would make a difference or not.
It happens at irregular times, but often just when I right click on a
tree view node, or at application startup time when I am loading
components into the tree on the "main" thread. It still happens even
with all my own background threads disabled, so the only threads running
are the ones launched by the JVM and the AWT-EventQueue-0 thread (or
possibly Pivot Tasks doing resource loading). I have had it run for 10
or fifteen minutes sometimes, but lately it crashes fairly soon into the
application. Usually when it crashes it also crashes the dump
generator, so there is no reliable stack frame in the
"hs_err_pidxxxx.log" file either. "valgrind" reports no problems, "gdb"
is unable to print a stack frame, and "strace" shows nothing unusual
either. Usually, but not always, what's reported is a SIGSEGV or
SIGABRT that crashes the JVM and the crashing address is somewhere
inside a monitor wait (like "pthread_cond_wait", or sometimes in "kill").
The identical Java/Pivot code runs fine on all our other environments,
although on Win32 there was a SEGV reported that was handled by an
exception handler somewhere deep inside the JVM. The only
platform-specific code is inside JNI routines and the only code
differences are in a mutex class (Windows uses "CriticalSection" and
OSX/Linux use "pthread_mutex"). But, I put "printf" tracing around the
mutex stuff on RHEL and it appeared to be working fine. And usually the
crash occurred within Java code (i.e., nowhere near the JNI code
layer). And, as I said, I disabled my own background thread (which was
my first thought) so that the only thread running with my application
code was the AWT event thread, so there was no possibility of multiple
threads in my own code interfering with each other.
So, I'm left with a complete mystery, and the more so because the OSX
code and the Linux code, from my end, are almost identical and OSX works
flawlessly (and has done so both 32-bit and 64-bit). I can't remember,
now, whether I've been running Pivot .jars
Oh, the original version of Java I was using was OpenJDK that was
certified with RedHat (something like 1.6_16). But, yesterday I tried
installing the latest Oracle 1.6_26 version and it was essentially
exactly the same result with either. Although, I'm not sure I can't
rule out installation issues, since my Linux knowledge is sketchy at
best. But, our system admin did the original OpenJDK installation, and
I'm pretty sure he knows what he's doing.
Sorry this is so long, but (as you can probably tell), this has been
rather frustrating. I'm kind of grasping at straws here, since I'm
pretty sure the problem lies in my code, but I am at a loss to be able
to figure out where. HTH. Thanks for any insights anyone might have.
~Roger Whitcomb
On 8/5/11 7:49 PM, Chris Bartlett wrote:
Can you elaborate a little on the crashes, or if you think they are
limited to that particular version of RHES?
Does it matter how the app is launched? (Applet/desktop app/web start)
Have you tried things like the KitchenSink or ComponentExplorer demos
(I assume you are taking about non-headless apps)?
On 6 August 2011 07:55, Roger L. Whitcomb<[email protected]> wrote:
… problems with Pivot on Red Hat Enterprise Linux Server release 5.7
(Tikanga)??
uname:Linux 2.6.18-274.el5 #1 SMP Fri Jul 8 17:36:59 EDT 2011 x86_64
libc:glibc 2.5 NPTL 2.5
rlimit: STACK 10240K, CORE 0k, NPROC 3072, NOFILE 1024, AS infinity
I’m getting crashes all over the place in this environment whereas on Win32,
Win64, OSX 64 everything is working fine. Must be something I’ve done in my
platform-specific code, but I just thought I’d check to see if anyone had
seen problems in this environment.
BTW, it happens either with OpenJDK or Oracle/Sun released JDK.
Thanks.
Roger Whitcomb
Architect, Engineering
Ingres Corporation
[email protected]
PHONE +1 650.587.5596
FAX +1 650.587.5550
www.ingres.com
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