[slurm-users] Can't find an address

[Eli V]

In addition to these other suggestions, keep in mind the slurmd's will
talk to each other if you have more then 50 nodes(see TreeWidth in
slurm.conf), so this will require the nodes to be able to DNS lookup
and communicate to all the other nodes as well as the slurmctlds. I
tried adding in some nodes on a different network that couldn't talk
with all the other nodes, and it didn't go so well with them randomly
going into the down state like you mentioned.
On Thu, Oct 25, 2018 at 6:59 AM Andy Riebs <andy.riebs at hpe.com> wrote:
>
> Make sure that the "hostname" command returns the same name that Slurm expects on your compute nodes.
>
> ________________________________
> From: Zohar Roe Mlm <RZohar8 at iai.co.il>
> Sent: Thursday, October 25, 2018 3:02AM
> To: 'Slurm User Community List' <slurm-users at lists.schedmd.com>
> Cc:
> Subject: Re: [slurm-users] Can't find an address
>
> Hi Lachlan,
>
>
>
> Thanks for the replay. I am trying to find more Ideas for this problem. May be some system or strange communication problem.
>
> As for your suggestion:
>
> > Check that it's in /etc/hosts --> It is. And answer to ping both on ip and host name every time I check
>
> > Check the slurmd logs --> In the node log there is no error, In the server log there is the error I wrote ("agent/is_node_resp: node:myName1 RPC:REQUEST_PING : Can't find an address, check slurm.conf ")
>
> > Make sure there is enough disk space --> More than enough
>
> > Make sure that it's datetime is synchronized with the others  --> Same time and date on all nodes and Slurm server.
>
>
>
> The problem is that I don't see any other error and the node is up and running without any error.
>
> The communication looks good with good ping but still it looks like the server can't find it (And it happen every two minute, always).
>
>
>
> Thanks for your ideas,
>
> Roy.
>
>
>
> From: slurm-users [mailto:slurm-users-bounces at lists.schedmd.com] On Behalf Of Lachlan Musicman
> Sent: Thursday, October 25, 2018 1:59 AM
> To: Slurm User Community List
> Subject: Re: [slurm-users] Can't find an address
>
>
>
>
>
> On Wed, 24 Oct 2018 at 22:56, Zohar Roe MLM <RZohar8 at iai.co.il> wrote:
>
> Hello,
>
> I have a node that from some reason change state to "Down" evert few minutes.
>
> When I change it with scontrol to "resume" its ok until Down again.
>
> In the slurm server log I can see error:
>
> "agent/is_node_resp: node:myName1 RPC:REQUEST_PING : Can't find an address, check slurm.conf"
>
>
>
> Now, The error message seems kind of straight forward but I can't find the problem.
>
> * The node is up and answer to ping from the slurm server.
>
> * The slurm deamon on the node is up and running.
>
> * There isn't any error on the node itself.
>
> * There are more node, configure the same (except from the ip address) that are Ok.
>
> * running "scontrol update state=eesume nodename"myNode" fix the problem for a short time
>
> * restarting slurm deamon on node also fix this for a short time
>
>
>
> Any idea what more I can check to resolve this?
>
>
>
> Here's a quick top of my head checklist:
>
>
>
> Check that it's in /etc/hosts
>
> Check the slurmd logs
>
> Make sure there is enough disk space
>
> Make sure that it's datetime is synchronized with the others
>
>
>
> cheers
>
> L.
>
>
>
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