Description of problem:
On a fresh CNS setup, a block device was created and deleted. 

sequence of steps:

[root@dhcp47-10 ~]# heketi-cli blockvolume create --size=1
Name: blockvol_fe101c6ebe284a3541ee55fd27455679
Size: 1
Volume Id: fe101c6ebe284a3541ee55fd27455679
Cluster Id: ec2643d674d0c508a7bfaf8f8def2cf1
Hosts: [10.70.46.248 10.70.47.49 10.70.47.72]
IQN: iqn.2016-12.org.gluster-block:c6e412b5-c570-4686-a691-514643a11bbf
LUN: 0
Hacount: 3
Username:
Password:
Block Hosting Volume: e35289f5c42657c03386ecaa569b8659
[root@dhcp47-10 ~]#
[root@dhcp47-10 ~]#
[root@dhcp47-10 ~]# heketi-cli blockdevice delete fe101c6ebe284a3541ee55fd27455679
Error: unknown command "blockdevice" for "heketi-cli"
Run 'heketi-cli --help' for usage.
[root@dhcp47-10 ~]# heketi-cli blockvolume delete fe101c6ebe284a3541ee55fd27455679
Error: Unable to get the block volume delete info for block volume blockvol_fe101c6ebe284a3541ee55fd27455679
[root@dhcp47-10 ~]# heketi-cli blockvolume info blockvol_fe101c6ebe284a3541ee55fd27455679
Error: Invalid path or request

[root@dhcp47-10 ~]# heketi-cli blockvolume info fe101c6ebe284a3541ee55fd27455679
Name: blockvol_fe101c6ebe284a3541ee55fd27455679
Size: 1
Volume Id: fe101c6ebe284a3541ee55fd27455679
Cluster Id: ec2643d674d0c508a7bfaf8f8def2cf1
Hosts: [10.70.46.248 10.70.47.49 10.70.47.72]
IQN: iqn.2016-12.org.gluster-block:c6e412b5-c570-4686-a691-514643a11bbf
LUN: 0
Hacount: 3
Username:
Password:
Block Hosting Volume: e35289f5c42657c03386ecaa569b8659

[root@dhcp47-10 ~]# heketi-cli blockvolume delete fe101c6ebe284a3541ee55fd27455679
Error: Unable to execute command on glusterfs-gs6n5:

When I check in the backend, there is no block-volume. So, heketi has actually deleted in the first attempt but failed to update its db accordingly. [check heketi-log that'll be attached shortly]


sh-4.2# gluster-block volume list
unknown option: volume
sh-4.2# gluster vol list
heketidbstorage
vol_e35289f5c42657c03386ecaa569b8659
sh-4.2# gluster-block list  vol_e35289f5c42657c03386ecaa569b8659
*Nil*

Version-Release number of selected component (if applicable):
cns-deploy-5.0.0-14.el7rhgs.x86_64

How reproducible:
1/1

Steps to Reproduce:
create and delete gluster-block vol via heketi