Intel Software Network - <![CDATA[ mpdboot fails to start nodes with different users. ]]> feed http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283 en-us Re: mpdboot fails to start nodes with different users. Did you check for a bad or stale entry in .ssh/known_hosts for the account?
]]> http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Wed, 21 Oct 2009 10:33:46 -0700 http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Intel® Cluster Ready Tools Re: mpdboot fails to start nodes with different users.
Quoting - tim18
Did you check for a bad or stale entry in .ssh/known_hosts for the account?
every node has the same known_hosts file
]]> http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Wed, 21 Oct 2009 13:08:43 -0700 http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Intel® Cluster Ready Tools Re: mpdboot fails to start nodes with different users.
every node has the same known_hosts file
but it has a separate entry for each node.  You could check, for example, that ssh is working to the troublesome nodes with that known_hosts file and that account.  It's often as simple as removing the bad entries and letting them be regenerated.
]]> http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Wed, 21 Oct 2009 15:15:52 -0700 http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Intel® Cluster Ready Tools Re: mpdboot fails to start nodes with different users.
Quoting - tim18
but it has a separate entry for each node.  You could check, for example, that ssh is working to the troublesome nodes with that known_hosts file and that account.  It's often as simple as removing the bad entries and letting them be regenerated.

Cleared the entries and had them regenerated

The problem still persists
]]> http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Thu, 22 Oct 2009 07:16:06 -0700 http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Intel® Cluster Ready Tools Re: mpdboot fails to start nodes with different users.

Cleared the entries and had them regenerated

The problem still persists

Could you try to figure out the problem by using mpdcheck and mpdringtest?

Regards!
Dmitry

]]> http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Thu, 22 Oct 2009 22:06:18 -0700 http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Intel® Cluster Ready Tools Re: mpdboot fails to start nodes with different users. Hi tahgroup,

If you believe this might be an issue with the way that ssh is setup for your users on the cluster, you can try using the Expect script we provide with the Intel® MPI Library installation. It's called sshconnectivity.exp and it should be located in the original directory where the contents of the l_mpi_p_3.2.1.009 package were untarred. Of course, you would need to install the expect software first in order to run the script.

If you do decide to go this route, the script would setup secure shell connectivity across the entire cluster for the particular user account for you. To run it, all you have to do is provide a list of hosts:

$ ./sshconnectivity.exp machines.LINUX

where machines.LINUX contains the hostnames of all nodes on the cluster (including the head node), one per line.

This is just another option, if you're stuck. Let us know how it goes.

Regards,
~Gergana

]]> http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Mon, 26 Oct 2009 17:02:20 -0700 http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Intel® Cluster Ready Tools Re: mpdboot fails to start nodes with different users. I was away form the problem for a bit.

Anyway,
I ran ./sshconnectivity.exp machines.LINUX
It reported that all nodes connect properly.

What other things could be causing the problem besides ssh?

]]> http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Mon, 02 Nov 2009 07:32:44 -0800 http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Intel® Cluster Ready Tools Re: mpdboot fails to start nodes with different users.

Could you try to figure out the problem by using mpdcheck and mpdringtest?

Regards!
Dmitry


I tried this method as the user.
I have attached the results of the mpdcheck test
Essentially no errors with the mpdcheck
mpdringtest wont work till I can get  the ring up
mpdboot still fails with a connection refused error
]]> http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Tue, 03 Nov 2009 10:57:09 -0800 http://software.intel.com/en-us/forums/intel-clusters-and-hpc-technology/topic/69283/ Intel® Cluster Ready Tools