[Condor-users] checkpointing produces segfault

[Patrick Huber <phuber@xxxxxxxxxxxxxxxx>]

Hi,

I have a somewhat strange problem. I linked my code with 
condor_compile and everything worked just fine. Also 
checkpointing worked fine.  Now, it stopped working, more 
precisely: the program segfaults at random times, but runs fine 
otherwise. It seems that only ca. 50% of jobs are affected.
I have no clue what component in the system changed. The userlog 
tells something like:

> 01 (1627.026.000) 02/24 19:08:41 Job executing on host: <144.92.180.55:33798>
> ...
> 005 (1627.026.000) 02/24 19:08:41 Job terminated.
>         (0) Abnormal termination (signal 11)
>         (0) No core file
>                 Usr 0 00:00:00, Sys 0 00:00:00  -  Run Remote Usage
>                 Usr 0 00:00:00, Sys 0 00:00:00  -  Run Local Usage
>                 Usr 0 00:00:00, Sys 0 00:00:00  -  Total Remote Usage
>                 Usr 0 00:00:00, Sys 0 00:00:00  -  Total Local Usage
>         2432  -  Run Bytes Sent By Job
>         3003342  -  Run Bytes Received By Job
>         0  -  Total Bytes Sent By Job
>         0  -  Total Bytes Received By Job

I tried to run this job on that machine by hand and it works - no 
segfaults. Thus I looked in more detail and tried to make it 
checkpoint by sending SIGTSTP and voila I get a segfault. If I 
look at the core dump and the stack I find it always looks like 
that:

> #0  0x08102788 in adler32 ()
> #1  0x080fde76 in fill_window ()
> #2  0x080fdc61 in deflate_slow ()
> #3  0x080fcc87 in deflate ()
> #4  0x080c704b in SegMap::Write ()
> #5  0x080c682c in Image::Write ()
> #6  0x080c6503 in Image::Write ()
> #7  0x080c6382 in Image::Write ()
> #8  0x080c7751 in Checkpoint ()
> #9  <signal handler called>

It seems that 'adler32' is the last thing called. Searching the 
list archive I found one message stating a similar problem, but 
no solution. Any help would be much appreciated.


Thanks,
Patrick
--
Dr. Patrick Huber                       Physics Department
                                        University of Wisconsin
Tel.:+1 608 262 2886                    1150 University Avenue
http://pheno.physics.wisc.edu/~phuber   Madison, WI 53706, USA