[mpich-discuss] Error Running MPICH for Photochemical Modeling

Balaji, Pavan balaji at anl.gov
Wed Sep 17 12:59:10 CDT 2014


I’m not sure the logs will be useful.  This seems to be an application issue, not an MPICH issue.  The application process is terminating abruptly.

  — Pavan

On Sep 17, 2014, at 12:56 PM, Seo, Sangmin <sseo at anl.gov> wrote:

> I have looked into your log file, but it seems that the real error happened in other process, not rank 0. The socket of rank 0 was closed because the other process died. Can you send us log files of other processes?
> 
> And, can you also send us the execution result with "-print-all-exitcodes” option? For example, 
> mpiexec -machinefile nodes -np $NUMPROCS -print-all-exitcodes $EXEC -mpich-dbg=file -mpich-dbg-class=all -mpich-dbg-level=verbose
> -print-all-exitcodes option will show the exit codes for each process.
> 
> Regards,
> Sangmin
> 
> 
> On Sep 17, 2014, at 12:33 PM, Abhishek Bhat <abhat at trinityconsultants.com> wrote:
> 
>> Any luck on finding solution on the error in the log file provided?
>>  
>>  
>> Thank You
>> Abhishek
>>  
>> ………………………………………………………………………………………………….
>> Abhishek Bhat, PhD, EPI,
>> Senior Consultant
>>  
>>  
>> From: Abhishek Bhat 
>> Sent: Tuesday, September 16, 2014 11:36 AM
>> To: <discuss at mpich.org>
>> Cc: 'sseo at anl.gov'
>> Subject: RE: [mpich-discuss] Error Running MPICH for Photochemical Modeling
>>  
>> Sangmin,
>>  
>> Sorry for the confusion, I was looking in the wrong location.  Please find attached the splice of the debug file 0 where the Error is occurring.
>>  
>>  
>> Thank You
>> Abhishek
>>  
>> ………………………………………………………………………………………………….
>> Abhishek Bhat, PhD, EPI,
>> Senior Consultant
>>  
>>  
>> From: Seo, Sangmin [mailto:sseo at anl.gov] 
>> Sent: Tuesday, September 16, 2014 11:12 AM
>> To: Abhishek Bhat
>> Cc: <discuss at mpich.org>
>> Subject: Re: [mpich-discuss] Error Running MPICH for Photochemical Modeling
>>  
>> The log files should be found in the directory where you execute the application. Did you run the application with debug options, -mpich-dbg=file -mpich-dbg-class=all -mpich-dbg-level=verbose?
>>  
>> — Sangmin
>>  
>>  
>> On Sep 16, 2014, at 11:05 AM, Abhishek Bhat <abhat at trinityconsultants.com> wrote:
>>  
>> 
>> Sangmin,
>>  
>> I configured the MPICH with revised code and included the additional options as described.  Where should I be looking for the log files?
>> I cannot see any files generated.
>>  
>> Thank You
>> Abhishek
>>  
>> ………………………………………………………………………………………………….
>> Abhishek Bhat, PhD, EPI,
>> Senior Consultant
>>  
>>  
>> From: Seo, Sangmin [mailto:sseo at anl.gov] 
>> Sent: Monday, September 15, 2014 12:43 PM
>> To: Abhishek Bhat
>> Cc: <discuss at mpich.org>
>> Subject: Re: [mpich-discuss] Error Running MPICH for Photochemical Modeling
>>  
>> Sorry, “./make” should have been “make”
>>  
>> — Sangmin
>>  
>> On Sep 15, 2014, at 12:40 PM, Seo, Sangmin <sseo at anl.gov> wrote:
>> 
>> 
>> 
>> Did you run dmesg on the node which executed the rank failed? I don't see any error message from your log file.
>>  
>> Anyway, let's try with MPICH DEBUG messages. As described inhttps://wiki.mpich.org/mpich/index.php/Debug_Event_Logging, first configure MPICH with "--enable-g=dbg,log" to enable event logging and built it. For example,
>> $ ./configure --prefix=$INSTALL_DIR --enable-g=dbg,log
>> $ ./make -j8
>> $ ./make install
>>  
>> Then, execute your application with additional options, "-mpich-dbg=file -mpich-dbg-class=all -mpich-dbg-level=verbose." With the recent MPICH, you don't need to use mpdboot. Just execute your application with mpiexec like:
>> mpiexec -machinefile nodes -np $NUMPROCS $EXEC -mpich-dbg=file -mpich-dbg-class=all -mpich-dbg-level=verbose
>>  
>> This will generate log files, such as dbg0-xxxx.log, dbg1-xxxx.log, etc. Since the log files may be large, it would be difficult to send them to us. If so, please take a look at each file, find error messages, and send the error message to us.
>>  
>> And, if you can reproduce the same error with small code, it will be really helpful to figure out your problem. Could you write a simplified code and send us the code?
>>  
>> Regards,
>> Sangmin
>>  
>>  
>> On Sep 15, 2014, at 10:58 AM, Abhishek Bhat <abhat at trinityconsultants.com> wrote:
>> 
>> 
>> 
>> Sangmin,
>>  
>> Please see attached the logs from demsg.  I apologies but I am not a computer expert so it’s all Greek to me.. Can you please see if you can find any error or reason for the failure?
>>  
>>  
>> Thank You
>> Abhishek
>>  
>> ………………………………………………………………………………………………….
>> Abhishek Bhat, PhD, EPI,
>> Senior Consultant
>>  
>>  
>> From: Seo, Sangmin [mailto:sseo at anl.gov] 
>> Sent: Monday, September 15, 2014 9:21 AM
>> To: Abhishek Bhat
>> Cc: <discuss at mpich.org>
>> Subject: Re: [mpich-discuss] Error Running MPICH for Photochemical Modeling
>>  
>> Can you run dmesg on the node of rank 1, which is killed by signal 9, after you execute your application? You can find the reason that the process is killed at the end of dmesg output, e.g., out of memory.
>>  
>> — Sangmin
>>  
>>  
>> On Sep 14, 2014, at 12:37 PM, Abhishek Bhat <abhat at trinityconsultants.com> wrote:
>> 
>> 
>> 
>> 
>> Because the application works when less intensive runs and fails for more intensive runs, it is likely that the application is requesting too many resources.  When\where should I run ulimit –a and dmesg, after I get the error?  If that is true, is there any way to change the environment in MPI to increase the capacity so that the increased resources can be accommodated?
>>  
>> If I run it in new terminal – here is what I get
>>  
>> core file size          (blocks, -c) 0
>> data seg size           (kbytes, -d) unlimited
>> scheduling priority             (-e) 0
>> file size               (blocks, -f) unlimited
>> pending signals                 (-i) 250598
>> max locked memory       (kbytes, -l) 64
>> max memory size         (kbytes, -m) unlimited
>> open files                      (-n) 1024
>> pipe size            (512 bytes, -p) 8
>> POSIX message queues     (bytes, -q) 819200
>> real-time priority              (-r) 0
>> stack size              (kbytes, -s) 10240
>> cpu time               (seconds, -t) unlimited
>> max user processes              (-u) 1024
>> virtual memory          (kbytes, -v) unlimited
>> file locks                      (-x) unlimited
>>  
>> in my job, I try to set the stack size to – unlimited but I guess it is not working.
>>  
>> Let me know.  Thank you for all the help.
>> Abhishek
>> ………………………………………………………………………………………………….
>> Abhishek Bhat, PhD, EPI,
>> Senior Consultant
>>  
>>  
>> From: Seo, Sangmin [mailto:sseo at anl.gov] 
>> Sent: Sunday, September 14, 2014 11:16 AM
>> To: <discuss at mpich.org>
>> Subject: Re: [mpich-discuss] Error Running MPICH for Photochemical Modeling
>>  
>> Abhishek,
>>  
>> Signal 9 is caused by many reasons, e.g., CPU time, out of memory, etc., but it is mostly because the application requests too many resources. You can check the environment settings with ulimit -a. And, you may find some information about your error from dmesg.
>>  
>> Thanks,
>> Sangmin
>>  
>>  
>> On Sep 12, 2014, at 5:51 PM, Abhishek Bhat <abhat at trinityconsultants.com> wrote:
>> 
>> 
>> 
>> 
>> 
>> Sangmin.
>>  
>> I updated to mpich3 and getting the following error
>>  
>> Fatal error in MPI_Recv: A process has failed, error stack:
>> MPI_Recv(187).............: MPI_Recv(buf=0x7fff93840c30, count=644490, MPI_REAL, src=1, tag=14131, MPI_COMM_WORLD, status=0x7fff94444f20) failed
>> dequeue_and_set_error(865): Communication error with rank 1
>> rank 1 in job 1  dfw-camx_55000   caused collective abort of all ranks
>>   exit status of rank 1: killed by signal 9
>>  
>> Same situation, successful runs for smaller resource runs and for up to 7 processes.  Error at more than 7.  Here is the mpich command I am using to run from my job file…
>>  
>> cat << ieof > nodes
>> dfw-camx:1
>> dfw-camx-n1:1
>> dfw-camx-n2:1
>> dfw-camx-n3:1
>> dfw-camx-n4:1
>> dfw-camx-n5:1
>> dfw-camx-n6:1
>> dfw-camx-n7:1
>> ieof
>> set NUMPROCS = 8
>> set RING = `wc -l nodes | awk '{print $1}'`
>> mpdboot -n $RING -f nodes –verbose
>>  
>> if( ! { mpiexec -machinefile nodes -np $NUMPROCS $EXEC } ) then
>>    mpdallexit
>>    exit
>> endif
>>  
>>  
>> For a successful run the NUMPROCS has to be < = 7.
>>  
>> Any help is much appreciated.
>>  
>> Thank You
>> Abhishek
>> ………………………………………………………………………………………………….
>> Abhishek Bhat, PhD, EPI,
>> Senior Consultant
>>  
>>  
>> From: Seo, Sangmin [mailto:sseo at anl.gov] 
>> Sent: Friday, September 12, 2014 1:11 PM
>> To: <discuss at mpich.org>
>> Subject: Re: [mpich-discuss] Error Running MPICH for Photochemical Modeling
>>  
>> Hi Abhishek,
>>  
>> Can you try with the recent MPICH release to see if the same error happens? You can download the recent release, 3.1.2, from http://www.mpich.org/downloads/.
>>  
>> Thanks,
>> Sangmin
>>  
>>  
>> On Sep 12, 2014, at 12:59 PM, Abhishek Bhat <abhat at trinityconsultants.com> wrote:
>> 
>> 
>> 
>> 
>> 
>> 
>> I am running a photochemical modeling on Linux cluster (CentOS_64 bit) with 1 master and 8 slave nodes with quad core (intel i7) on each node.  I have two scenarios, in first scenario, I am running less data intensive run on all 8 nodes (NUMPROCS = 9) and the run will go fine.  When running same configuration for a more intense run, I am getting following error.
>>  
>> Fatal error in MPI_Recv: Other MPI error, error stack:
>> MPI_Recv(187).....................: MPI_Recv(buf=0x7fff989d53b0, count=644490, MPI_REAL, src=1, tag=14131, MPI_COMM_WORLD, status=0x7fff995d96a0) failed
>> MPIDI_CH3I_Progress(150)..........:
>> MPID_nem_mpich2_blocking_recv(948):
>> MPID_nem_tcp_connpoll(1720).......:
>> state_commrdy_handler(1556).......:
>> MPID_nem_tcp_recv_handler(1446)...: socket closed
>> rank 1 in job 1  dfw-camx_55000   caused collective abort of all ranks
>>   exit status of rank 1: killed by signal 9
>>  
>> If I run the program with smaller nodes (smaller than 7 NUMPROCS) the run goes fine.
>>  
>> It appears that the rank 1 (my first node) is collectively causing all the ranks, but I could identify why.  I tried following solutions –
>>  
>> 1.       Increased master memory to 32 gb
>> 2.       Increased all nodes memory to 32 gb
>> 3.       Exchanged the rank 1 to different node in the parallel.
>>  
>> In all situations, I am getting this error.  Surprisingly, when I am running smaller (less data intensive runs), I am not getting this error even if I increase the NUMPROCS to 32 processes.
>>  
>> Any help will be highly appreciated.
>>  
>> I am running mpich 1.4
>>  
>> Thank You
>> Abhishek
>> ………………………………………………………………………………………………….
>> Abhishek Bhat, PhD, EPI,
>> Senior Consultant
>>  
>> Trinity Consultants
>> 12770 Merit Drive, Suite 900  |  Dallas, Texas 75251
>> 
>> Office:  972-661-8100|  Mobile:  806-281-7617
>> Email:  abhat at trinityconsultants.com  |  LinkedIn: www.linkedin.com/in/abhattrinityconsultants
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>> 
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--
Pavan Balaji  ✉️
http://www.mcs.anl.gov/~balaji

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