[mpich-discuss] Calling MPI from a CGI Python script
Dave Goodell
goodell at mcs.anl.gov
Thu Apr 29 08:14:27 CDT 2010
It appears that you are using Open MPI, not MPICH2. This list is
primarily for MPICH2 discussion and support. Please contact the Open
MPI developers at users at open-mpi.org.
-Dave
On Apr 29, 2010, at 12:21 AM, Srujan kumar wrote:
> Hi,
>
> I am trying to run an MPI program as a CGI Python script which is
> running over an Apache web server running locally on my computer.
>
> I have a test.py file which has the code snippet
>
> cmd = 'opt/local/bin/mpiexec -n 7 testmpi'
> output = commands.getoutput(cmd)
>
>
> When I run the file test.py as an executable over command line (as ./
> test.py ), it works perfectly fine.
>
> But when I try to run the same over the web browser, the MPI code
> functions as if the command was 'mpiexec -n 1 testmpi'.
> It is unable to recognize that there are multiple processes that are
> being invoked. In other words it is not forking child processes.
>
> I checked in to the error log in apache regarding the same. The
> corresponding error code is following:
>
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261.local:
> 07199] [0,0,0]-[0,0,1] mca_oob_tcp_msg_send_handler: writev failed:
> Broken pipe (32), referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261.local:
> 07199] [0,0,0] ORTE_ERROR_LOG: Communication failure in file /
> SourceCache/openmpi/openmpi-5/openmpi/orte/mca/gpr/replica/
> communications/gpr_replica_recv_proxy_msgs.c at line 49, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> *** Process received signal ***, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> Signal: Segmentation fault (11), referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> Signal code: Address not mapped (1), referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> Failing at address: 0x8, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [ 0] 2 libSystem.B.dylib 0x00000000803ec3fa
> _sigtramp + 26, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [ 1] 3 ??? 0x0000000000000004 0x0
> + 4, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [ 2] 4 libopen-rte.0.dylib 0x000000000002dca9
> mca_oob_send_packed_nb + 297, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [ 3] 5 mca_oob_tcp.so 0x00000000000f4a8f
> mca_oob_tcp_msg_complete + 175, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [ 4] 6 mca_oob_tcp.so 0x00000000000f588a
> mca_oob_tcp_peer_send + 298, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [ 5] 7 mca_oob_tcp.so 0x00000000000f9973
> mca_oob_tcp_send_nb + 595, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [ 6] 8 libopen-rte.0.dylib 0x000000000002dc4c
> mca_oob_send_packed_nb + 204, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [ 7] 9 mca_gpr_replica.so 0x00000000002271a0
> orte_gpr_replica_recv + 304, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [ 8] 10 libopen-rte.0.dylib 0x000000000002da13
> mca_oob_recv_packed_nb + 403, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [ 9] 11 mca_oob_tcp.so 0x00000000000f5073
> mca_oob_tcp_msg_recv_complete + 771, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [10] 12 mca_oob_tcp.so 0x00000000000f6400
> mca_oob_tcp_peer_lookup + 2240, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [11] 13 libopen-pal.0.dylib 0x0000000000077f3e
> opal_event_base_loop + 990, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [12] 14 libopen-pal.0.dylib 0x000000000006e8ce
> opal_progress + 126, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [13] 15 mpiexec 0x0000000000001b9d
> orterun + 2242, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [14] 16 mpiexec 0x0000000000001764
> orterun + 1161, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [15] 17 mpiexec 0x00000000000012d9 main
> + 27, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> [16] 18 mpiexec 0x000000000000129c
> start + 52, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] [NeoDen-1261:07199]
> *** End of error message ***, referer: http://localhost:8888/
> [Wed Apr 28 20:32:20 2010] [error] [client ::1] /Users/esrujan/
> apache2/htdocs/cgi-bin/shell.sh: line 29: 7199 Segmentation
> fault mpiexec -np 10 testmpi, referer: http://localhost:8888/
>
>
> Can some one help me what the problem is? Why am I not able to run
> the MPI using a CGI script.
>
> Thanks a ton for your help,
> --
> Srujan Kumar Enaganti
>
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