Description of problem:
geo-replication fails 

Version-Release number of selected component (if applicable):
4.1.4

How reproducible:
awlays

Steps to Reproduce:
1. Setup geo-replication

Actual results:
From gsyncd log
Traceback (most recent call last):
  File "/usr/libexec/glusterfs/python/syncdaemon/repce.py", line 101, in worker
    res = getattr(self.obj, rmeth)(*in_data[2:])
  File "/usr/libexec/glusterfs/python/syncdaemon/changelogagent.py", line 37, in init
    return Changes.cl_init()
  File "/usr/libexec/glusterfs/python/syncdaemon/changelogagent.py", line 21, in __getattr__
    from libgfchangelog import Changes as LChanges
  File "/usr/libexec/glusterfs/python/syncdaemon/libgfchangelog.py", line 17, in <module>
    class Changes(object):
  File "/usr/libexec/glusterfs/python/syncdaemon/libgfchangelog.py", line 19, in Changes
    use_errno=True)
  File "/usr/lib64/python2.7/ctypes/__init__.py", line 361, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: libgfchangelog.so: cannot open shared object file: No such file or directory


Expected results:
No error

Additional info:
From /usr/libexec/glusterfs/python/syncdaemon/libgfchangelog.py 

class Changes(object):
    libgfc = CDLL("/usr/lib64/libgfchangelog.so", mode=RTLD_GLOBAL,
                  use_errno=True)

.so libraries are provided by -devel packages. To fix this user will have to install devel pacakge, or the code needs to be updated to use "libgfchangelog.so.1" .

related mail from other users - https://lists.gluster.org/pipermail/gluster-users/2018-July/034425.html