[petsc-users] PETSC ERROR: Caught signal number 15 Terminate

[Matthew Knepley]

On Fri, Aug 5, 2011 at 2:50 AM, Debao Shao <Debao.Shao at brion.com> wrote:

> **
>
> Thanks, I’m trying your suggestion “PetscInitialize(&argc, &argv, 0, 0 )”,
> hope it can fix the problem. ****
>
> ** **
>
> Do you mind to explain a little “PetscInitialize” to me? ****
>
> 1, must it be call at the beginning of program?
>

It must be called before you call any PETSc function, or use MPI.


> ****
>
> 2, what’s the other purpose if I don’t want to input any argc?
>

It initializes MPI.


> ****
>
> 3, if I implement petsc as an optional solution, can I put
> “PetscInitialize” just before petsc is really executed, while not just put
> them at the beginning of program?
>

Yes.

    Matt


> Thanks,****
>
> **De**bao****
>  ------------------------------
>
> *From:* petsc-users-bounces at mcs.anl.gov [mailto:
> petsc-users-bounces at mcs.anl.gov] *On Behalf Of *Matthew Knepley
> *Sent:* Friday, August 05, 2011 10:44 AM
> *To:* **PETSc users list**
> *Subject:* Re: [petsc-users] PETSC ERROR: Caught signal number 15
> Terminate****
>
> ** **
>
> On Fri, Aug 5, 2011 at 2:38 AM, **De**bao Shao <Debao.Shao at brion.com>
> wrote:****
>
>  Doesn’t SEGV fault is signal 11?****
>
>  ** **
>
> Yes, 15 is SIGTERM. It appears that either you have another signal handler
> installed which****
>
> is terminating on an error, or something killed your program. I can
> guarantee you that the****
>
> PetscInitialize(0,0,0,0) is a seg fault.****
>
> ** **
>
>    Matt****
>
>  ****
>
>   ****
>  ------------------------------
>
> *From:* petsc-users-bounces at mcs.anl.gov [mailto:
> petsc-users-bounces at mcs.anl.gov] *On Behalf Of *Matthew Knepley
> *Sent:* Friday, August 05, 2011 10:35 AM****
>
>
> *To:* **PETSc users list**
> *Subject:* Re: [petsc-users] PETSC ERROR: Caught signal number 15
> Terminate****
>
>  ****
>
> On Fri, Aug 5, 2011 at 2:33 AM, **De**bao Shao <Debao.Shao at brion.com>
> wrote:****
>
>  So the real problem is the wrong usage of “PetscInitialize(0, 0, 0, 0 )”,
> but I do have many successive runs before with this setting.****
>
>   ****
>
> Any kind of memory overwrite gives an SEGV. So other code, making a
> different error will give that too.****
>
>  ****
>
>    Matt****
>
>  ****
>
>   ****
>
> Thanks,****
>
> **De**bao****
>  ------------------------------
>
> *From:* petsc-users-bounces at mcs.anl.gov [mailto:
> petsc-users-bounces at mcs.anl.gov] *On Behalf Of *Matthew Knepley
> *Sent:* Friday, August 05, 2011 10:25 AM
> *To:* **PETSc users list**
> *Subject:* Re: [petsc-users] PETSC ERROR: Caught signal number 15
> Terminate****
>
>  ****
>
> On Fri, Aug 5, 2011 at 2:20 AM, **De**bao Shao <Debao.Shao at brion.com>
> wrote:****
>
>   DA: ****
>
>  ****
>
> Sometimes I may encounter crashing when using PETSc, it doesn’t happen
> always. ****
>
>  ****
>
> [0]PETSC ERROR:
> ------------------------------------------------------------------------**
> **
>
> [0]PETSC ERROR: Caught signal number 15 Terminate: Somet process (or the
> batch system) has told this process to end****
>
> [0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger
> ****
>
> [0]PETSC ERROR: or see
> http://www.mcs.anl.gov/petsc/petsc-as/documentation/troubleshooting.html#Signal[0]PETSCERROR: or try
> http://valgrind.org on GNU/linux****
>
> and Apple Mac OS X to find memory corruption errors****
>
> [0]PETSC ERROR: configure using --with-debugging=yes, recompile, link, and
> run****
>
> [0]PETSC ERROR: to get more information on the crash.****
>
> [0]PETSC ERROR: --------------------- Error Message
> ------------------------------------****
>
> [0]PETSC ERROR: Signal received!****
>
> [0]PETSC ERROR:
> ------------------------------------------------------------------------**
> **
>
> [0]PETSC ERROR: Petsc Release Version 3.1.0, Patch 8, Thu Mar 17 13:37:48
> CDT 2011****
>
> [0]PETSC ERROR: See docs/changes/index.html for recent updates.****
>
> [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.****
>
> [0]PETSC ERROR: See docs/index.html for manual pages.****
>
> [0]PETSC ERROR:
> ------------------------------------------------------------------------**
> **
>
> [0]PETSC ERROR: Unknown Name on a linux-gnu named r0leaf17 by tachyon Thu
> Aug  4 04:04:19 2011****
>
> [0]PETSC ERROR: Libraries linked from
> /home/dshao/dev_t2k/third_party/OOQP/OOQP-0.99.19/extras/petsc-3.1-p8/linux-gnu-c-debug/lib
> ****
>
> [0]PETSC ERROR: Configure run at Thu Apr 21 18:09:19 2011****
>
> [0]PETSC ERROR: Configure options --with-mpi=0 --with-debugging=0
> -with-log=0 -with-info=0****
>
> [0]PETSC ERROR:
> ------------------------------------------------------------------------**
> **
>
> [0]PETSC ERROR: User provided function() line 0 in unknown directory
> unknown file****
>
>  ****
>
> Do you happen to know the possible cause?****
>
>  ****
>
> I also have a question about the usage of “PetscInitialize” &
> “PetscFinalize”. I can’t totally understand them from the manual. ****
>
>  ****
>
> Now, I wrote it as: ****
>
> Int main(int argc, char **argv)****
>
> {****
>
>          PetscInitialize(0, 0, 0, 0 );****
>
>   ****
>
> This is not a valid call. Try****
>
>  ****
>
>   PetscInitialize(&argc, &argv, 0, 0);****
>
>  ****
>
> Signal 15 is a segmentation fault, which means an illegal memory read or
> write.****
>
>  ****
>
>    Matt****
>
>  ****
>
>    ****
>
>          VerifyApp app(argc, argv);****
>
>          app.Initialize();****
>
>          app.Run();****
>
>  ****
>
>          PetscFinalize();****
>
>          return 0;****
>
> }****
>
>  ****
>
> Then, built a binary, say “verify”, and executed “verify” on a server
> first, then, started another “verify” on client by server. ****
>
> The program ran at client side can be multiple processes and multiple
> threads.****
>
>  ****
>
> Is my usage correct? ****
>
> Your answer is appreciated. ****
>
>  ****
>
> Thanks,****
>
> **De**bao****
>
>  ****
>  ------------------------------
>
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>  ****
>  ------------------------------
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>
>
> --
> What most experimenters take for granted before they begin their
> experiments is infinitely more interesting than any results to which their
> experiments lead.
> -- Norbert Wiener****
>
> ** **
>  ------------------------------
>
> -- The information contained in this communication and any attachments is
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>
>
>
> --
> What most experimenters take for granted before they begin their
> experiments is infinitely more interesting than any results to which their
> experiments lead.
> -- Norbert Wiener****
>
> ------------------------------
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> prohibited. Unless explicitly stated otherwise in the body of this
> communication or the attachment thereto (if any), the information is
> provided on an AS-IS basis without any express or implied warranties or
> liabilities. To the extent you are relying on this information, you are
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>



-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
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