[Clas_offline] gsim_bat does not run in batch farm

Jixie Zhang jixie at jlab.org
Sun Sep 30 05:24:10 EDT 2018


Hi CLAS members,
  gsim_bat  give me some trouble that I could not understand. I am wondering
if any of you have similar experience.  The clas_package version I am using
is
a pretty old version: release-4-14, but I made necessary modification to
have it
compiled and run in RHEL7.

  gsim_bat does not run in batch farm since August 2018, before that the
same executable
ran smoothly.
gsim_bat encountered with "segmentation fault" when run in batch farm.
It runs normally in interactive farm (ifarm1401 and ifarm1402) but only
in some specified work disk. I recompiled the whole CLAS PACKAGE but this
problem stays.

After careful investigation, I found that gsim_bat can not be run in the
following path:

/work/halla/solid/*
/work/hallc/sane/*
/scratch/jixie/*
/cache/halla/solid/*
/home/jixie/*
(I only tested the above disk|drive. the list could be even longer...)
The error message is:

--------------error message start---------------------
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.

Backtrace for this error:
#0  0x7FB9ADAC3467
#1  0x7FB9ADAC3AAE
#2  0x7FB9ACFCA66F
#3  0x7FB9AD02A13F
#4  0x625AD5 in ctimef_
#5  0x41AA65 in gsimpar_2_bos_
#6  0x4076CF in uginit_
#7  0x4058D3 in MAIN__ at gsim_bat.F:?
Segmentation faultifarm1401.jlab.org>

--------------error message end---------------------

The error message told that the problem happen at calling ctimef()
subroutine, which comes from cernlib.  I do not trust this error message
too much.

However, the same executable can run in
/work/clas/claseg4/jixie/*
/work/halla/g2p/disk1/jixie/*

Surprisingly, gsim_bat_debug works well in everywhere. gsim_bat_debug was
compiled with -DEBUG defined, which means the source code is totally
different.

See more details of my test here:
https://userweb.jlab.org/~jixie/gsim_bat_problem.txt


-- 
With Best Regards,
Jixie Zhang
757-269-7735
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