so the issue is, fetching it with '<VOLNAME>.rdma' key is not working. Need to make the path as '<VOLNAME>.rdma-fuse.vol', instead of '<VOLNAME>-rdma-fuse.vol'
PATCH: http://patches.gluster.com/patch/7274 in release-3.2 (glusterd-volgen: fix rdma volume file path in case of 'tcp, rdma' transport.)
*** This bug has been marked as a duplicate of bug 2294 ***