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From Jérôme Serré <jerome.michel.se...@gmail.com>
Subject RE: Any reports of...
Date Sat, 06 Aug 2011 09:04:29 GMT

"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""

I have the same problem time to time. it's seems to be random.
Both applet and DesktopApplication.

Run on windows 7 x64, jvm x86 and x64 (ie 32 and 64 bit)

I don't know how to distinct if the problem come from java, windows or pivot

-----Message d'origine-----
De : Roger and Beth Whitcomb [mailto:RogerandBeth@rbwhitcomb.com] 
Envoyé : samedi 6 août 2011 06:29
À : user@pivot.apache.org
Objet : Re: Any reports of...

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<Roger.Whitcomb@ingres.com>
>> … 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
>> roger.whitcomb@ingres.com
>> PHONE +1 650.587.5596
>> FAX +1 650.587.5550
>> www.ingres.com
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