Receiving error on iscsi device: "connectionX:0: detected conn error" in RHEL

Solution Verified - Updated -

Issue

  • ISCSI LUN from external storage is shared in two different servers. Following error messages are seen in /var/log/messages file related to iscsi LUNs.
Apr  1 11:43:11 hostname kernel: connection36:0: detected conn error (1020)
Apr  1 11:43:11 hostname kernel: connection34:0: detected conn error (1020)
Apr  1 11:43:11 hostname kernel: connection33:0: detected conn error (1020)
Apr  1 11:43:12 hostname iscsid: Kernel reported iSCSI connection 18:0 error (1020 - ISCSI_ERR_TCP_CONN_CLOSE: TCP connection closed) state (3)
Apr  1 11:43:12 hostname iscsid: Kernel reported iSCSI connection 20:0 error (1020 - ISCSI_ERR_TCP_CONN_CLOSE: TCP connection closed) state (3)
Apr  1 11:43:12 hostname iscsid: Kernel reported iSCSI connection 30:0 error (1020 - ISCSI_ERR_TCP_CONN_CLOSE: TCP connection closed) state (3)
  • multipath paths failed after kernel reported "connectionX:0: detected conn error (1020)" and the server became unresponsive
  • iscsi connections failed with a "conn error"
  • What is causing my iscsi connections to report an error?

Environment

  • Red Hat Enterprise Linux (RHEL) 5, 6, or 7
  • iscsi-intiator-utils

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