After not planed restart of array (EMC VNXe 3200) one of our hosts form cluster lose connection to datastores (two others renewed the connection). And now situation is: iscsi software adapter see targets but not paths and arrary inform us that initiators does not have any logged in initiator paths.
Few more details after consultation with EMC/DELL:
++One of the host is not discovering the datastores from VNXe and all other hosts are able to see the datastores.
++Tried rebooting the hosts did not help
++iSCSI servers are visible on the host side but not the datastores
++did a re-scan.
++Removed and re-added the host
++MTU size is 9000 on all the hosts, switch and storage
++Host does not have initiators logged in errors are seen from storage side
++Storage and datastores looks healthy and no other errors reported from storage side.