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iscsid: Kernel reported iSCSI connection 1:0 error (1020 - ISCSI_ERR_TCP_CONN_CLOSE: ...)

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Applies To:

Oracle Cloud Infrastructure - Version N/A and later

Goal:

Below messages appear sporadically in OCI instances:

Sep 22 04:34:28 kernel: connection1:0: detected conn error (1020)
Sep 22 04:34:28 iscsid: Kernel reported iSCSI connection 1:0 error (1020 - ISCSI_ERR_TCP_CONN_CLOSE: TCP connection closed) state (3)
Sep 22 04:34:31 iscsid: connection1:0 is operational after recovery (1 attempts)

No other related lines are present in the error and connection is recovered in 2 or 3 seconds.

Solution:

This is normal and can be safely ignored.

The error sequence indicates that there was a temporary problem in connectivity to the storage backend but it was safely recovered within seconds.

Sep 22 04:34:28 kernel: [19149096.364474] connection1:0: detected conn error (1020)           <<<< connection error
Sep 22 04:34:28 iscsid: Kernel reported iSCSI connection 1:0 error (1020 - ISCSI_ERR_TCP_CONN_CLOSE: TCP connection closed) state (3)   <<<<<< connection was closed
Sep 22 04:34:31 iscsid: connection1:0 is operational after recovery (1 attempts) <<<<<<<<<<<  the connection was actually in use and was recovered successfully after 3 seconds.

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