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Problem SSHing into Euler

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f13-759-biondo

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Unread post Sun Nov 10, 2013 6:55 pm

Problem SSHing into Euler

When I try to SSH into Euler I get the following message:
  Code:
ssh_exchange_identification: Connection closed by remote host


It has been doing this for about an hour. I have tried from two different computers and I get the same message. I am able to SSH elsewhere just fine. Any advice?

-Elliott
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Andrew Seidl

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Unread post Sun Nov 10, 2013 7:17 pm

Re: Problem SSHing into Euler

File server issues. Investigating.
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f13-759-psankaranara

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Unread post Mon Nov 11, 2013 1:07 am

Re: Problem SSHing into Euler

Have been getting the same error since 4 PM. Still unable to login. :(
-Praveen
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f13-759-agola

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Unread post Mon Nov 11, 2013 2:43 am

Re: Problem SSHing into Euler

Is this problem fixed? I am facing this issue and I really have only this time to work on the homework. Is there any alternative to run cuda?
Thanks
Anjali
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Andrew Seidl

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Unread post Mon Nov 11, 2013 10:01 am

Re: Problem SSHing into Euler

Finally managed to get it back up - controller completely locked up after a drive failure instead of gracefully failing over to a spare. Performance will be degraded for a few hours while the array rebuilds.

Please remember: backups are your responsibility. We unfortunately do not have to resources to backup everyone's files at this time.
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f13-759-agola

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Unread post Mon Nov 11, 2013 10:50 am

Re: Problem SSHing into Euler

Thank you very much Andrew. I was able to use it for a while and as you said, IO is slow. Even normal directory operations such as ls and scp are very slow (in the order of 3-4 minutes). Thanks for fixing this.
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f13-759-agola

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Unread post Mon Nov 11, 2013 11:28 am

Re: Problem SSHing into Euler

It worked for about half an hour and now I am not able to log in again. It takes my password and doesnt respond with anything.
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Andrew Seidl

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Unread post Mon Nov 11, 2013 11:35 am

Re: Problem SSHing into Euler

Looks like rebuilding is taking precedence over accessing the drives.

If anyone needs access to a GPU *NOW*, send me an email.
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Andrew Seidl

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Unread post Sat Nov 16, 2013 1:13 pm

Re: Problem SSHing into Euler

And we're back. If you're interested in what happened, it's very similar to this post: http://www.spinics.net/lists/xfs/msg09213.html plus an additional smart failure (or so claims the controller...) which caused a failed array rebuild (takes 2-3 days to do).

I also took the opportunity to perform some much needed maintenance and run some updates.

Email me if you notice any issues (eg missing or corrupted files). If you did any work while the server was down, check /home-20131116 for your files.

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