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Re: remote kernel problem

• To: mathgroup at smc.vnet.net
• Subject: [mg111685] Re: remote kernel problem
• From: Cristobal Navarro <axischire at gmail.com>
• Date: Tue, 10 Aug 2010 03:56:00 -0400 (EDT)

i tested what you suggested Nate,

instead of just puting "math" in the argument.
i put complete path

/usr/local/bin/math

but i get the same error when testing a 2+2 example.

if this is useful:
the arguments of MLOpen:
-LinkMode Listen
-LinkProtocol TCPIP
-LinkOptions MLDontInteract

the arguments of shell command to launch kernel
`java` -jar `mathssh` fcluster@agua /usr/local/bin/math -mathlink -LinkMode
Connect -LinkProtocol TCPIP -LinkName "`linkname`" -LinkHost `ipaddress`

fcluster is the account on the remote node which has hostname "agua".
my laptop uses another account, from what i know it is not necesary to have
the same username on both nodes right?

On Mon, Aug 9, 2010 at 5:31 PM, Nate Dudenhoeffer <dudenhoeffer at wisc.edu>wrote:

> Cristobal,
>
> I had a similar problem setting up remote kernels on Mac OS.  In the kernel
> configuration try putting the complete path to the kernel, instead of simply
> "math."
>
> On Mac OS the path is:
> /Applications/Mathematica.app/Contents/MacOS/MathKernel
>
> Regards,
> Nate
>
> On Mon, Aug 9, 2010 at 4:13 AM, Cristobal Navarro <axischire at gmail.com>wrote:
>
>> hello,
>>
>> i am having problems launching remote kernels.
>> i have a Xeon server (Linux) on which mathematica is installed, and
>> the "math" command works.
>>
>> on my laptop, i have linux too, and on mathematica i add the kernel to
>> be launched on the remote (the server)  node.
>> then i try one example:
>> 2+2
>>
>> i press shift+enter... mathematica asks me to insert the password of
>> the remote node user name.... ok  and then i get error message:
>>
>> "The kernel serverKernel failed to connect to the front end. (Error =
>> MLECONNECT). You should try running the kernel connection outside the
>> front end."
>>
>> for debugging purposes, i made a kernel for my same laptop, just like
>> a "Local" kernel but i choose remote and put my ip adress and my
>> useracount of my laptop.
>>
>> i test 2+2, it asks my password..ok, then the same message:
>>
>> "The kernel self failed to connect to the front end. (Error =
>> MLECONNECT). You should try running the kernel connection outside the
>> front end."
>>
>> this is really weird.
>>
>> the parameters of the "self kernel" are this:
>> `java` -jar `mathssh` fcluster@agua math -mathlink -LinkMode Connect -
>> LinkProtocol TCPIP -LinkName "`linkname`" -LinkHost `ipaddress`
>>
>> if remote kernel does not work with my same computer, i better not
>> keep trying with the server yet.
>>
>> any help is welcome, i really dont know what is going on.
>>
>> best regards
>> Cristobal.
>>
>>
>>
>