* Brian Barrett (brbarret_at_[hidden]) wrote:
> On Jul 8, 2005, at 12:54 PM, Bharath Ramesh wrote:
>
> > I am trying to load a shared library written by me for my mpi
> > application. But when I call mpirun its unable to locate the shared
> > library. The shared library does exist in the path. I have also set
> > the
> > LD_LIBRARY_PATH. As you can see from the output of ldd its able to
> > locate the library.
> >
> > I am attaching the output
> >
> > $ ldd ./test
> > libdsm.so.1 => ./libdsm.so.1 (0x0000002a9566c000)
> > liblamio.so.4 => /usr/lib/liblamio.so.4 (0x0000002a95772000)
> > liblam.so.4 => /usr/lib/liblam.so.4 (0x0000002a9589e000)
> > libutil.so.1 => /lib/libutil.so.1 (0x0000002a95aa8000)
> > libdl.so.2 => /lib/libdl.so.2 (0x0000002a95bac000)
> > libpthread.so.0 => /lib/libpthread.so.0 (0x0000002a95caf000)
> > libc.so.6 => /lib/libc.so.6 (0x0000002a95dc3000)
> > /lib64/ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2
> > (0x0000002a95556000)
> >
> > $ lamnodes
> > n0 compute1:1:origin,this_node
> > n1 compute2:1:
> >
> > $ mpirun -v N ./test
> > 30269 ./test running on n0 (o)
> > 26474 ./test running on n1
> > ./test: error while loading shared libraries: libdsm.so.1: cannot open
> > shared object file: No such file or directory
> > ----------------------------------------------------------------------
> > -------
> > It seems that [at least] one of the processes that was started with
> > mpirun did not invoke MPI_INIT before quitting (it is possible that
> > more than one process did not invoke MPI_INIT -- mpirun was only
> > notified of the first one, which was on node n0).
> >
> > mpirun can *only* be used with MPI programs (i.e., programs that
> > invoke MPI_INIT and MPI_FINALIZE). You can use the "lamexec" program
> > to run non-MPI programs over the lambooted nodes.
> > ----------------------------------------------------------------------
> > -------
>
> The launched executable is going to have the LD_LIBRARY_PATH of the
> lamd that started it, not the LD_LIBRARY_PATH of mpirun. So you need
> to make sure that you re-lamboot after setting up your shell to
> properly set your LD_LIBRARY_PATH for non-interactive logins.
>
> The other option is to have mpirun push it's LD_LIBRARY_PATH as part
> of the environment "test" will run under. Something like:
>
> mpirun -v -xLD_LIBRARY_PATH N ./test
>
> should do the trick.
Pushing LD_LIBRARY_PATH using mpirun did the job. Thanks for the help
Bharath
---
Bharath Ramesh <bramesh_at_[hidden]> http://csgrad.cs.vt.edu/~bramesh
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