Re: GNU Parallel Bug Reports Xauth problem with parallel

[Ole Tange]

On Mon, Dec 2, 2013 at 2:10 PM, Mathias Verbeke <address@hidden> wrote:
> Dear all,
>
> I'm trying to set up parallel (version 20121122) using different servers in
> a cluster. When I run the "doubleit" example from the man pages locally
> (with "-S :"), it works as expected. However, when I try to ssh to the
> servers, I get:
>
> ---
>
> Warning: No xauth data; using fake authentication data for X11 forwarding.
>
> /usr/bin/xauth:  error in locking authority file
> /home/myusername/.Xauthority
>
> bash: doubleit: command not found
>
> ---
>
> What could be wrong here?

What you are seeing is 2 different issues.

The .Xauthority problem is due to you exporting X to the remote host.
You probably have something in your .ssh/config like this:

Host *
  ForwardX11 yes

And you probably ssh to multiple servers that share the same homedir.
As this is done in parallel the servers with fight over ~/.Xauthority.
The solution is to remove the Forwarding from .ssh/config or use 'ssh
-x'.

- o -

The second problem is due to you not transmitting the function to the
remote machines using --env.

But it is actually a good idea to expand the man-page example with the --env.


/Ole