Hi Josh:
I am running on linux fedora core 7 kernel: 2.6.23.15-80.fc7
The machine is dual-core with shared memory so it's not even a
cluster.
I downloaded r18208 and built it with the following options:
./configure --prefix=/usr/local/openmpi-with-checkpointing-r18208
--
with-ft=cr --with-blcr=/usr/local/blcr
when I run mpirun I pass the following command:
mpirun -np 2 -am ft-enable-cr ./ares-openmpi -c -f madonna-13760
I was able to checkpoint and restart successfully and was able to
checkpoint the restarted job (mpirun showed up with ps-efa |grep
mpirun under r18208) but was unable to restart again; here's the
error message:
mpi-restart ompi_global_snapshot_23865.ckpt
[dhcp-119-202.caltech.edu:23846] [[45670,1],1]-[[45670,0],0]
mca_oob_tcp_msg_send_handler: writev failed: Broken pipe (32)
[dhcp-119-202.caltech.edu:23846] [[45670,1],1] routed:unity:
Connection to lifeline [[45670,0],0] lost
[dhcp-119-202.caltech.edu:23845] [[45670,1],0]-[[45670,0],0]
mca_oob_tcp_msg_send_handler: writev failed: Broken pipe (32)
[dhcp-119-202.caltech.edu:23845] [[45670,1],0] routed:unity:
Connection to lifeline [[45670,0],0] lost
[dhcp-119-202.caltech.edu:23846] [[45670,1],1]-[[45670,0],0]
mca_oob_tcp_msg_send_handler: writev failed: Broken pipe (32)
[dhcp-119-202.caltech.edu:23846] [[45670,1],1] routed:unity:
Connection to lifeline [[45670,0],0] lost
[dhcp-119-202.caltech.edu:23845] [[45670,1],0]-[[45670,0],0]
mca_oob_tcp_msg_send_handler: writev failed: Broken pipe (32)
[dhcp-119-202.caltech.edu:23845] [[45670,1],0] routed:unity:
Connection to lifeline [[45670,0],0] lost
---------------------------------------------------------------------
-----
mpirun has exited due to process rank 1 with PID 24012 on
node dhcp-119-202.caltech.edu exiting without calling "finalize".
This may
have caused other processes in the application to be
terminated by signals sent by mpirun (as reported here).
Thank you in advance for your help.
Tamer
On Apr 18, 2008, at 7:07 AM, Josh Hursey wrote:
This problem has come up in the past and may have been fixed since
r14519. Can you update to r18208 and see if the error still
occurs?
A few other questions that will help me try to reproduce the
problem.
Can you tell me more about the configuration of the system you are
running on (number of machines, if there is a resource manager)?
How
did you configure Open MPI and what command line options are you
passing to 'mpirun'?
-- Josh
On Apr 18, 2008, at 9:36 AM, Tamer wrote:
Thanks Josh, I tried what you suggested with my existing r14519,
and I
was able to checkpoint the restarted job but was never able to
restart
it. I looked up the PID for 'orterun' and checkpointed the
restarted
job but when I try to restart from that point I get the following
error:
ompi-restart ompi_global_snapshot_7704.ckpt
[dhcp-119-202.caltech.edu:07292] [[61851,1],1]-[[61851,0],0]
mca_oob_tcp_msg_send_handler: writev failed: Broken pipe (32)
[dhcp-119-202.caltech.edu:07292] [[61851,1],1] routed:unity:
Connection to lifeline [[61851,0],0] lost
[dhcp-119-202.caltech.edu:07292] [[61851,1],1]-[[61851,0],0]
mca_oob_tcp_msg_send_handler: writev failed: Broken pipe (32)
[dhcp-119-202.caltech.edu:07292] [[61851,1],1] routed:unity:
Connection to lifeline [[61851,0],0] lost
[dhcp-119-202.caltech.edu:07291] [[61851,1],0]-[[61851,0],0]
mca_oob_tcp_msg_send_handler: writev failed: Broken pipe (32)
[dhcp-119-202.caltech.edu:07291] [[61851,1],0] routed:unity:
Connection to lifeline [[61851,0],0] lost
[dhcp-119-202.caltech.edu:07291] [[61851,1],0]-[[61851,0],0]
mca_oob_tcp_msg_send_handler: writev failed: Broken pipe (32)
[dhcp-119-202.caltech.edu:07291] [[61851,1],0] routed:unity:
Connection to lifeline [[61851,0],0] lost
-------------------------------------------------------------------
-------
orterun has exited due to process rank 1 with PID 7737 on
node dhcp-119-202.caltech.edu exiting without calling "finalize".
This
may
have caused other processes in the application to be
terminated by signals sent by orterun (as reported here).
Do I have to run the copenmpi clean command after the first
checkpoint
and before restarting the checkpointed job so I can checkpoint it
again or is there something I am missing in this version
completely
and I would have to go to r18208? Thank you in advance for your
help.
Tamer
On Apr 18, 2008, at 6:03 AM, Josh Hursey wrote:
When you use 'ompi-restart' to restart a job it fork/execs the
completely new job using the restarted processes for the ranks.
However instead of calling the 'mpirun' process ompi-restart
currently
calls 'orterun'. These two programs are exactly the same (mpirun
is a
symbolic link to orterun). So if you look for the PID of
'orterun'
that can be used to checkpoint the process.
However it is confusing that Open MPI makes this switch. So I
committed in r18208 a fix for this that uses the 'mpirun' binary
name
instead of the 'orterun' binary name. This fits with the typical
use
case of checkpoint/restart in Open MPI in which users expect to
find
the 'mpirun' process on restart instead of the lesser known
'orterun'
process.
Sorry for the confusion.
Josh
On Apr 18, 2008, at 1:14 AM, Tamer wrote:
Dear all, I installed the developer's version r14519 and was
able to
get it running. I successfully checkpointed a parallel job and
restarted it. My question is how can I checkpoint the restarted
job?
The problem is once the original job is terminated and
restarted
later
on, the mpirun does not exist anymore (ps -efa|grep mpirun) and
hence
I do not know which PID I should use when I run the ompi-
checkpoint
on
the restarted job. Any help would be greatly appreciated.
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