On 26 Feb 2009 at 9:51, Mike Christie wrote:

> 
> Ulrich Windl wrote:
> > Hello,
> > 
> > I've simulated a remote network failure by adding a blackhole route for one 
> > of the 
> > remote iSCSI ports, watching the kernel messages of SLES 10 SP1 (open-iscsi-
> > 2.0.707-0.32). I tried to follow the configuration guidelines in README for 
> > using 
> > multipath. The host sees three target LUNs, each reachable via 16 paths 
> > like this:
[...]
> > It all starts with this:
> > iscsid: cannot make a connection to 172.20.76.1:3260 (101)
> > kernel:  connection224:0: iscsi: detected conn error (1011)
> > kernel:  connection225:0: iscsi: detected conn error (1011)
> > kernel:  connection226:0: iscsi: detected conn error (1011)
> > kernel:  connection227:0: iscsi: detected conn error (1011)
> > [...more and repeating about every second...]
> 
> The detected conn error messages are not repeating are they? It should 
> only fire once when we detect a problem.

Yes, there is only one "conn error" per connection.

> 
> > iscsid: detected iSCSI connection 224:0 error (1011) state (3)
> > iscsid: cannot make a connection to 172.20.76.1:3260 (101)
> 
> These ones do spit out over and over. I agree we should have some back 
> off code for that. Will fix it in a second.

Very good!

[...]
> > [ the other thing is that multipathd REPEATEDLY reports the paths being 
> > down, i.e. 
> > it reports the STATE, not the TRANSITION of the state.: ]
> 
> Do you mean it repeatedly reports this for each path or that you get a 
> message for each path that is on the same session/connection?

Does that extract from the log answer your question? ;-)
Feb 26 13:24:30 rkdvmso1 multipathd: sdaa: tur checker reports path is down
Feb 26 13:26:28 rkdvmso1 multipathd: sdab: tur checker reports path is down
Feb 26 13:26:29 rkdvmso1 multipathd: sdac: tur checker reports path is down
Feb 26 13:26:29 rkdvmso1 multipathd: sdad: tur checker reports path is down
Feb 26 13:26:29 rkdvmso1 multipathd: sdae: tur checker reports path is down
Feb 26 13:26:29 rkdvmso1 multipathd: sdaf: tur checker reports path is down
Feb 26 13:26:29 rkdvmso1 multipathd: sdag: tur checker reports path is down
Feb 26 13:26:29 rkdvmso1 multipathd: sdah: tur checker reports path is down
Feb 26 13:26:29 rkdvmso1 multipathd: sdau: tur checker reports path is down
Feb 26 13:26:29 rkdvmso1 multipathd: sdav: tur checker reports path is down
Feb 26 13:26:29 rkdvmso1 multipathd: sdaw: tur checker reports path is down
Feb 26 13:26:29 rkdvmso1 multipathd: sdax: tur checker reports path is down
Feb 26 13:26:34 rkdvmso1 multipathd: sdaa: tur checker reports path is down
Feb 26 13:26:34 rkdvmso1 multipathd: sdab: tur checker reports path is down
Feb 26 13:26:34 rkdvmso1 multipathd: sdac: tur checker reports path is down
Feb 26 13:26:34 rkdvmso1 multipathd: sdad: tur checker reports path is down
Feb 26 13:26:34 rkdvmso1 multipathd: sdae: tur checker reports path is down
Feb 26 13:26:34 rkdvmso1 multipathd: sdaf: tur checker reports path is down
Feb 26 13:26:34 rkdvmso1 multipathd: sdag: tur checker reports path is down
Feb 26 13:26:34 rkdvmso1 multipathd: sdah: tur checker reports path is down
Feb 26 13:26:34 rkdvmso1 multipathd: sdau: tur checker reports path is down
Feb 26 13:26:34 rkdvmso1 multipathd: sdav: tur checker reports path is down
Feb 26 13:26:34 rkdvmso1 multipathd: sdaw: tur checker reports path is down
Feb 26 13:26:34 rkdvmso1 multipathd: sdax: tur checker reports path is down
Feb 26 13:26:39 rkdvmso1 multipathd: sdaa: tur checker reports path is down
Feb 26 13:26:39 rkdvmso1 multipathd: sdab: tur checker reports path is down
Feb 26 13:26:39 rkdvmso1 multipathd: sdac: tur checker reports path is down
Feb 26 13:26:39 rkdvmso1 multipathd: sdad: tur checker reports path is down
Feb 26 13:26:39 rkdvmso1 multipathd: sdae: tur checker reports path is down
Feb 26 13:26:39 rkdvmso1 multipathd: sdaf: tur checker reports path is down
Feb 26 13:26:39 rkdvmso1 multipathd: sdag: tur checker reports path is down
Feb 26 13:26:39 rkdvmso1 multipathd: sdah: tur checker reports path is down
Feb 26 13:26:39 rkdvmso1 multipathd: sdau: tur checker reports path is down
Feb 26 13:26:39 rkdvmso1 multipathd: sdav: tur checker reports path is down
Feb 26 13:26:39 rkdvmso1 multipathd: sdaw: tur checker reports path is down
Feb 26 13:26:39 rkdvmso1 multipathd: sdax: tur checker reports path is down
Feb 26 13:26:44 rkdvmso1 multipathd: sdaa: tur checker reports path is down
Feb 26 13:26:44 rkdvmso1 multipathd: sdab: tur checker reports path is down
Feb 26 13:26:44 rkdvmso1 multipathd: sdac: tur checker reports path is down
Feb 26 13:26:44 rkdvmso1 multipathd: sdad: tur checker reports path is down
Feb 26 13:26:44 rkdvmso1 multipathd: sdae: tur checker reports path is down
Feb 26 13:26:44 rkdvmso1 multipathd: sdaf: tur checker reports path is down
Feb 26 13:26:44 rkdvmso1 multipathd: sdag: tur checker reports path is down
Feb 26 13:26:44 rkdvmso1 multipathd: sdah: tur checker reports path is down
Feb 26 13:26:44 rkdvmso1 multipathd: sdau: tur checker reports path is down
Feb 26 13:26:44 rkdvmso1 multipathd: sdav: tur checker reports path is down
Feb 26 13:26:44 rkdvmso1 multipathd: sdaw: tur checker reports path is down
Feb 26 13:26:44 rkdvmso1 multipathd: sdax: tur checker reports path is down
Feb 26 13:26:49 rkdvmso1 multipathd: sdaa: tur checker reports path is down
Feb 26 13:26:49 rkdvmso1 multipathd: sdab: tur checker reports path is down
Feb 26 13:26:49 rkdvmso1 multipathd: sdac: tur checker reports path is down
Feb 26 13:26:49 rkdvmso1 multipathd: sdad: tur checker reports path is down
Feb 26 13:26:49 rkdvmso1 multipathd: sdae: tur checker reports path is down
Feb 26 13:26:49 rkdvmso1 multipathd: sdaf: tur checker reports path is down
Feb 26 13:26:49 rkdvmso1 multipathd: sdag: tur checker reports path is down
Feb 26 13:26:49 rkdvmso1 multipathd: sdah: tur checker reports path is down
Feb 26 13:26:49 rkdvmso1 multipathd: sdau: tur checker reports path is down
Feb 26 13:26:49 rkdvmso1 multipathd: sdav: tur checker reports path is down
Feb 26 13:26:49 rkdvmso1 multipathd: sdaw: tur checker reports path is down
Feb 26 13:26:49 rkdvmso1 multipathd: sdax: tur checker reports path is down
Feb 26 13:26:54 rkdvmso1 multipathd: sdaa: tur checker reports path is down
Feb 26 13:26:54 rkdvmso1 multipathd: sdab: tur checker reports path is down
Feb 26 13:26:54 rkdvmso1 multipathd: sdac: tur checker reports path is down
Feb 26 13:26:54 rkdvmso1 multipathd: sdad: tur checker reports path is down
Feb 26 13:26:54 rkdvmso1 multipathd: sdae: tur checker reports path is down
Feb 26 13:26:54 rkdvmso1 multipathd: sdaf: tur checker reports path is down
[...many more...]
Feb 26 13:28:15 rkdvmso1 multipathd: sdag: tur checker reports path is down
Feb 26 13:28:15 rkdvmso1 multipathd: sdah: tur checker reports path is down
Feb 26 13:28:15 rkdvmso1 multipathd: sdau: tur checker reports path is down
Feb 26 13:28:15 rkdvmso1 multipathd: sdav: tur checker reports path is down
Feb 26 13:28:15 rkdvmso1 multipathd: sdaw: tur checker reports path is down
Feb 26 13:28:15 rkdvmso1 multipathd: sdax: tur checker reports path is down

Regards,
Ulrich


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