How to solve a parallel pool start failure?

I am currently running MatLab R2014b on Ubuntu 14.04. I am trying to call MatLab code from a Python script and whenever I do so, I get one of the following error messages

    Error using matlabpool (line 148)
    Failed to start a parallel pool. (For information in addition to the causing error, validate the profile 'local' in the Cluster Profile Manager.)

    Error in plmDCA_symmetric (line 84)
            matlabpool('open',nr_of_cores)

    Caused by:
        Error using parallel.internal.apishared.ConnMgrBuilder.buildForCJS (line 113)
        MatlabPoolPeerInstance{fUuid=91b76bde-8e0d-4d20-9759-8019f90b9539, fGroupUuid=a68b8465-a1e7-4696-b0cd-3a1b5013151a, fLabIndex=-1,
        fNumberOfLabs=-1} could not bind a ServerSocketChannel on adenine to port 27372; it failed with a JVM Exception: Invalid argument

------------------------------------------------------------------------------

Error using matlabpool (line 148)
Failed to start a parallel pool. (For information in addition to the causing error, validate the profile 'local' in the Cluster Profile Manager.)

Error in plmDCA_symmetric (line 84)
        matlabpool('open',nr_of_cores)

Caused by:
    Error using parallel.internal.pool.InteractiveClient/start (line 329)
    Failed to start pool.
        Error using parallel.Cluster/createCommunicatingJob (line 82)
        Unable to write to MAT-file /home/felix/.matlab/local_cluster_jobs/R2014b/Job3.in.mat

          File may be corrupt.
------------------------------------------------------------------------------   
  Error using matlabpool (line 148)
  Failed to start a parallel pool. (For information in addition to the causing error, validate the profile 'local' in the Cluster Profile Manager.)

Error in plmDCA_symmetric (line 84)
        matlabpool('open',nr_of_cores)

Caused by:
    Error using parallel.internal.pool.InteractiveClient/start (line 329)
    Failed to start pool.
        Error using parallel.Job/createTask (line 273)
        The expected job file /home/felix/.matlab/local_cluster_jobs/R2014b/Job3.common.mat does not exist.

However, when validating my 'local' profile all tests pass and no problems occur. Even when running the program from within MatLab, it works!

Is there a way to resolve this issue?

Answer 1

[Edric Ellis]

That error is related to the communication channels that the parallel pool infrastructure is trying to set up. I'm not quite sure what you mean by "an external pipeline" - is it possible that in that situation, there are different firewall settings?

[Felix]

"External pipeline" is nothing else than a simple python script. I clarified in my original post. Thus, no firewall should even be involved in the process. All runs internally on a local machine.

[Edric Ellis]

Are you running multiple copies of this simultaneously? What OS are you using?

[Felix]

Updated question, I now get different error messages at the same point.

What do you mean by multiple copies simultaneously? the MatLab command is only run once, but multiple times in a row. But, a new instance only starts when the previous finished.

Working on a Ubuntu 14.04.