[Rocks] [Rocks-Discuss] HOST NOT RESOLVABLE error

[Roger.W....@aphis.usda.gov]

I'm having a series of errors crop up, which appear to be related,
although I don't quite know how they are related. The initial error
occurs during insert-ethers. As I power on each of the compute nodes to
install them, I see (HOST NOT RESOLVABLE) in red in the terminal window.
However, the nodes seem to install properly. However if I try to perform
"insert-ethers remove="compute-0-0", I get an error indicating that it
can't resolve the host name again, but the node DOES get removed. The big
problem occurs right after this. All other nodes are then reported as
"down' by ganglia, and upon reboot of the entire cluster, I get the
message "Host name lookup failure, error resolving local host". I'm not
sure where to look to resolve this issue. Does anybody have any guess
where to start?
-Roger
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[Ian Kaufman]

Sounds like your networking and/or DNS are messed up.

Ian

On Tue, May 4, 2010 at 12:49 PM, <Roger.W....@aphis.usda.gov> wrote:

> I'm having a series of errors crop up, which appear to be related,
> although I don't quite know how they are related. The initial error
> occurs during insert-ethers. As I power on each of the compute nodes to
> install them, I see (HOST NOT RESOLVABLE) in red in the terminal window.
> However, the nodes seem to install properly. However if I try to perform
> "insert-ethers remove="compute-0-0", I get an error indicating that it
> can't resolve the host name again, but the node DOES get removed. The big
> problem occurs right after this. All other nodes are then reported as
> "down' by ganglia, and upon reboot of the entire cluster, I get the
> message "Host name lookup failure, error resolving local host". I'm not
> sure where to look to resolve this issue. Does anybody have any guess
> where to start?
> -Roger
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> URL:
> https://lists.sdsc.edu/pipermail/npaci-rocks-discussion/attachments/20100504/1e0cbfe2/attachment.html
>



--

Ian Kaufman
Research Systems Administrator
UC San Diego, Jacobs School of Engineering ikaufman AT ucsd DOT edu

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[Bart Brashers]

The .local domain is handled via the DNS server running on your
frontend. Check if it's running (service named status) and if it
returns any values.

What IP range/mask did you specify for your compute nodes, and what IP
address/mask did you give for the public NIC on your frontend?

Bart

> I'm having a series of errors crop up, which appear to be related,
> although I don't quite know how they are related. The initial error
> occurs during insert-ethers. As I power on each of the compute nodes
to
> install them, I see (HOST NOT RESOLVABLE) in red in the terminal
window.
> However, the nodes seem to install properly. However if I try to
perform
> "insert-ethers remove="compute-0-0", I get an error indicating that it
> can't resolve the host name again, but the node DOES get removed. The
big
> problem occurs right after this. All other nodes are then reported as
> "down' by ganglia, and upon reboot of the entire cluster, I get the
> message "Host name lookup failure, error resolving local host". I'm
not
> sure where to look to resolve this issue. Does anybody have any guess
> where to start?
> -Roger
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: https://lists.sdsc.edu/pipermail/npaci-rocks-
> discussion/attachments/20100504/1e0cbfe2/attachment.html

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