Description of problem:

pypar fails to load

Version-Release number of selected component (if applicable):

[spimcmw@nanlnx1 ~]0% rpm -q openmpi pypar-common pypar-openmpi
openmpi-1.5.4-2.el6.x86_64
pypar-common-2.1.4_94-3.el6.noarch
pypar-openmpi-2.1.4_94-3.el6.x86_64
[spimcmw@nanlnx1 ~]0% 


How reproducible:

Every time.

Steps to Reproduce:

[spimcmw@nanlnx15 ~]0% python
Python 2.6.6 (r266:84292, Nov 21 2013, 12:39:37) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pypar
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.6/site-packages/openmpi/pypar/__init__.py", line 33, in <module>
    from pypar import *
  File "/usr/lib64/python2.6/site-packages/openmpi/pypar/pypar.py", line 863, in <module>
    mpi = CDLL('libmpi.so.0', RTLD_GLOBAL)
  File "/usr/lib64/python2.6/ctypes/__init__.py", line 353, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: libmpi.so.0: cannot open shared object file: No such file or directory
>>> 

Actual results:

pypar fails to import

Expected results:

pypar should import

Additional info:

libmpi.so.0 does not exist:

[spimcmw@nanlnx15 ~]0% ls -l /usr/lib64/openmpi/lib/libmpi.so*
lrwxrwxrwx. 1 root root      15 Feb 21 10:59 /usr/lib64/openmpi/lib/libmpi.so -> libmpi.so.1.0.2
lrwxrwxrwx. 1 root root      15 Feb 21 10:59 /usr/lib64/openmpi/lib/libmpi.so.1 -> libmpi.so.1.0.2
-rwxr-xr-x. 1 root root 1395848 Nov 25 19:20 /usr/lib64/openmpi/lib/libmpi.so.1.0.2

However libmpi.so.0 is not linked against:

[spimcmw@nanlnx15 ~]0% ldd /usr/lib64/python2.6/site-packages/openmpi/pypar/mpiext.so 
	linux-vdso.so.1 =>  (0x00007fff39788000)
	libmpi.so.1 => /usr/lib64/openmpi/lib/libmpi.so.1 (0x00007fa32f205000)
	libdl.so.2 => /lib64/libdl.so.2 (0x00007fa32efe9000)
	libpython2.6.so.1.0 => /usr/lib64/libpython2.6.so.1.0 (0x00007fa32ec43000)
	libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fa32ea26000)
	libc.so.6 => /lib64/libc.so.6 (0x00007fa32e691000)
	libnsl.so.1 => /lib64/libnsl.so.1 (0x00007fa32e478000)
	libutil.so.1 => /lib64/libutil.so.1 (0x00007fa32e275000)
	libm.so.6 => /lib64/libm.so.6 (0x00007fa32dff0000)
	libltdl.so.7 => /usr/lib64/libltdl.so.7 (0x00007fa32dde7000)
	/lib64/ld-linux-x86-64.so.2 (0x00000036ae800000)
[spimcmw@nanlnx15 ~]0% 


/usr/lib64/python2.6/site-packages/openmpi/pypar/pypar.py contains:

    # Work around bug in OpenMPI (December 2009): 
    # https://bugs.launchpad.net/ubuntu/+source/petsc4py/+bug/232036
    from ctypes import *
    mpi = CDLL('libmpi.so.0', RTLD_GLOBAL)
    # End work around

Update libmpi.so.0 to libmpi.so.1 and it works:


[spimcmw@nanlnx15 ~]0% python
Python 2.6.6 (r266:84292, Nov 21 2013, 12:39:37) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pypar
Pypar (version 2.1.4) initialised MPI OK with 1 processors
>>>