iscsi service, when to discovery of such error at the client:
root @deskt op0 Desktop]# iscsiadm -m discovery -t st -p system1
scsiadm: Could not stat /var/lib/ iscsi/nodes/1 , 3260, -1/default to delete node: No such file or directory
Solution:
cd /var/lib/iscsi
mv nodes /var/lib/iscsi/node
The nodes rename node can be solved.