How to Remove stale ISCSI Target Node Information from ISCSI Initiator Server

Applies to: 

Oracle Cloud Infrastructure

Linux OS – Oracle Linux 5.1 to Oracle Linux 7.6 (OL5U1 to OL7U6)

SYMPTOMS

Stale ISCSI target connections which are still present on Initiator node can lead to various issues like:

- hung iscsid service which can lead to global outage

- flood of messages error like:

messages:Jun 3 13:58:00 <HOSTNAME> iscsid: iscsid: Connection5:0 to [target: iqn-name, portal: ip-here,3260] through [iface: default] is shutdown.
messages:Jun 3 13:58:00 <HOSTNAME> iscsiadm: iscsiadm: Could not login to [iface: default, target: iqn-name, portal: ip-here,3260].
messages:Jun 3 13:58:00 <HOSTNAME> iscsiadm: Logging in to [iface: default, target: iqn-name, portal: ip-here,3260] (multiple)
messages:Jun 7 04:24:15 <HOSTNAME> iscsid: iscsid: Connection2:0 to [target: iqn-name, portal: ip-here,3260] through [iface: default] is shutdown.
messages:Jun 7 04:24:15 <HOSTNAME> iscsiadm: iscsiadm: Could not login to [iface: default, target: iqn-name, portal: ip-here,3260].
messages:Jun 7 04:24:15 <HOSTNAME> iscsiadm: Logging in to [iface: default, target: iqn-name, portal: ip-here,3260] (multiple)