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Subject: Re: [OMPI users] Need help resolving No route to host error with OpenMPI 1.1.2
From: Prasanna Ranganathan (prasanna_at_[hidden])
Date: 2008-09-12 18:25:26


Hi,

 I did make sure at the beginning that only eth0 was activated on all the
nodes. Nevertheless, I am currently verifying the NIC configuration on all
the nodes and making sure things are as expected.

While trying different things, I did come across this peculiar error which I
had detailed in one of my previous mails in this thread.

I am testing the helloWorld program in the following trivial case:

mpirun -np 1 -host localhost /main/mpiHelloWorld

Which works fine.

But,

mpirun -np 1 -host localhost --debug-daemons /main/mpiHelloWorld

always fails as follows:

Daemon [0,0,1] checking in as pid 2059 on host localhost
[idx1:02059] [0,0,1] orted: received launch callback
idx1 is node 0 of 1
ranks sum to 0
[idx1:02059] [0,0,1] orted_recv_pls: received message from [0,0,0]
[idx1:02059] [0,0,1] orted_recv_pls: received exit
[idx1:02059] *** Process received signal ***
[idx1:02059] Signal: Segmentation fault (11)
[idx1:02059] Signal code: (128)
[idx1:02059] Failing at address: (nil)
[idx1:02059] [ 0] /lib/libpthread.so.0 [0x2afa8c597f30]
[idx1:02059] [ 1] /usr/lib64/libopen-rte.so.0(orte_pls_base_close+0x18)
[0x2afa8be8e2a2]
[idx1:02059] [ 2] /usr/lib64/libopen-rte.so.0(orte_system_finalize+0x70)
[0x2afa8be795ac]
[idx1:02059] [ 3] /usr/lib64/libopen-rte.so.0(orte_finalize+0x20)
[0x2afa8be7675c]
[idx1:02059] [ 4] orted(main+0x8a6) [0x4024ae]
[idx1:02059] *** End of error message ***

The failure happens with more verbose output when using the -d flag.

Does this point to some bug in OpenMPI or am I missing something here?

I have attached ompi_info output on this node.

Regards,

Prasanna.