Why am I unable to use the Admin Center or connect to a cluster with Parallel Computing on Debian based systems?

When trying to open matlabpool on a Debian Linux system, I receive the following message:

 Starting matlabpool using the 'local' configuration ... stopped.

 ??? Error using ==> matlabpool at 104

 The interactive parallel job errored with the following message:

 Lab 1 on host localhost failed to connect to the MATLAB client

 on host localhost, port 27371.

Also I open the Admin Center and try to run a connectivity test, the test never completes and I receive no results. How can I resolve this issue?

Answer 1

[MathWorks Support Team]

This bug has been fixed in Release 2011a (R2011a). For previous product releases, read below for any possible workarounds:

This issue is a bug in Java on Debian with ipv6 settings. When the net.ipv6.bindv6only is set to 1, networking is broken for Java. For more details about this bug, see the report here:

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=560056

To check this setting you can run the following command:

sudo /sbin/sysctl net.ipv6.bindv6only

If the output of the command is "net.ipv6.bindv6only=1", you can temporarily change it by running:

sudo /sbin/sysctl net.ipv6.bindv6only=0

For a persistent fix, run the command:

sudo sed -i 's/net.ipv6.bindv6only\ =\ 1/net.ipv6.bindv6only\ =\ 0/' \

/etc/sysctl.d/bindv6only.conf && sudo invoke-rc.d procps restart

In either case, once complete, restart MATLAB to enable the changes. Once MATLAB is restarted, you should be able to use matlabpool once more.