Unable to reconnect namespace via NVMe/TCP

[Hannes Reinecke]

On 8/12/25 17:48, Anton Gavriliuk wrote:
> Hi
> 
> There are NVMe/TCP target and initiator servers, both running on
> RHEL10 (6.12.0-55.25.1.el10_0.x86_64)
> 
> NVMe/TCP target exports single NVMe SSD
> 
>        "namespaces": [
>          {
>            "device": {
>              "nguid": "01000000-0000-0000-8ce3-8ee3064aa4f2",
>              "path": "/dev/nvme0n1"
>            },
>            "enable": 1,
>            "nsid": 1
>          }
>        ],
> 
> If NVMe/TCP target is not available, initiator tries to reconnect
> every 10 seconds
> 
> [ 2586.071048] nvme nvme9: failed to connect socket: -111
> [ 2586.071403] nvme nvme9: Failed reconnect attempt 16/-1
> [ 2586.071565] nvme nvme9: Reconnecting in 10 seconds...
> [ 2596.310921] nvme nvme9: failed to connect socket: -111
> [ 2596.311186] nvme nvme9: Failed reconnect attempt 17/-1
> [ 2596.311349] nvme nvme9: Reconnecting in 10 seconds...
> [ 2606.550772] nvme nvme9: failed to connect socket: -111
> [ 2606.551252] nvme nvme9: Failed reconnect attempt 18/-1
> [ 2606.551592] nvme nvme9: Reconnecting in 10 seconds...
> 
> when NVMe/TCP target become available, initiator failed reconnect the namespace
> 
> [ 2606.551592] nvme nvme9: Reconnecting in 10 seconds...
> [ 2616.793080] nvme nvme9: creating 16 I/O queues.
> [ 2616.829881] nvme nvme9: mapped 16/0/0 default/read/poll queues.
> [ 2616.833685] nvme nvme9: Successfully reconnected (attempt 19/-1)
> [ 2616.834446] nvme nvme9: identifiers changed for nsid 1
> [ 2616.835618] block nvme9n1: no usable path - requeuing I/O
> [ 2616.856602] block nvme9n1: no available path - failing I/O
> [ 2616.856811] block nvme9n1: no available path - failing I/O
> 
> and there is no nvme9n1 namespace in the "nvme list" output.
> 
This looks like the missed re-scan issue I found recently.
Should be fixed with
9546ad1a9bda ("nvme: requeue namespace scan on missed AENs")

(And you are running RHEL. Please open a bugzilla with RH.)
(And why am I even answering that?)

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                  Kernel Storage Architect
hare at suse.de                                +49 911 74053 688
SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich