Version upgrades impacted/not impacted:
There is no resolution to this issue at this time, see the Workaround section.
Workaround:
To work around the issue:
Prior to the upgrade, use the esxcli get and set commands to set the generated iSCSI adapter IQN explicitly. As the IQN is a user setting it won't change after the upgrade.
For example:
Get the IQN details:
$ esxcli iscsi adapter get -A vmhba67
vmhba67
Name: iqn.test:<URL>:452738760:67
Set the IQN details:
$ esxcli iscsi adapter set -A vmhba67 -n iqn.test:<URL>:452738760:67