Issue with NFS exportfs, receiving "duplicated export entries" errors.

Issue

• NFS server is exporting file system to other hosts, but restarting the nfs service gives the following errors:

# cat /etc/exports
/testA/testA server1(rw)
/testA/testA server2(rw)
/testB/testB server1(rw)
/testB/testB server2(rw)

# service nfs start
Starting NFS services:  exportfs: duplicated export entries:
exportfs:       server1:/testA/testA
exportfs:       server2:/testA/testA
exportfs: duplicated export entries:
exportfs:       server1:/testB/testB
exportfs:       server2:/testB/testB                                                           [  OK  ]
Starting NFS quotas:                                       [  OK  ]
Starting NFS mountd:                                       [  OK  ]
Stopping RPC idmapd:                                       [  OK  ]
Starting RPC idmapd:                                       [  OK  ]
Starting NFS daemon:                                       [  OK  ]