parpool() (R2014a) fails on Linux

When executing the command parpool() from the MATLAB prompt, with or without arguments, the following error occurs:

Undefined variable "com" or class "com.mathworks.toolbox.distcomp.pmode.SessionInfo.NULL_SESSION_INFO".

Error in parpool (line 96) sessionInfo = com.mathworks.toolbox.distcomp.pmode.SessionInfo.NULL_SESSION_INFO;

The error message seems to be helpless. How can I fix it?

[Edric Ellis]

This looks like an installation problem. I suggest contacting MathWorks support.

[Eric Sillekens]

Did you start matlab with the -nojvm option, I got the same error when staring matlab using "matlab -nodisplay -nojvm"and and starting matlab using "matlab -nodisplay" solved it for me.

Answer 1

[Rafnuss]

I had the same problem when using (as documented here) :

matlab -nojvm -nodisplay -nosplash

But I manage to make it work without the -nojvm

matlab -nodisplay -nosplash

[Edric Ellis]

Parallel Computing Toolbox requires the JVM...

Answer 2

[Richa Gupta]

Can you provide the complete error message? Are you able to validate the profile successfully? Also, did you start MATLAB with -"nojvm" option?

[bge]

Here are more details with R2015a. The following is a screen capture:

>> p=parpool('local',2)
Starting parallel pool (parpool) using the 'local' profile ... 
Error using parpool (line 103)
Failed to start a parallel pool. (For information in addition to the causing error, validate the profile
'local' in the Cluster Profile Manager.)

Caused by:
    Error using parallel.internal.pool.InteractiveClient>iThrowWithCause (line 667)
    Failed to initialize the interactive session.
        Error using parallel.internal.pool.InteractiveClient>iThrowIfBadParallelJobStatus (line 768)
        The interactive communicating job failed with no message.

>> ver
----------------------------------------------------------------------------------------------------
MATLAB Version: 8.5.0.197613 (R2015a)
MATLAB License Number: ••••••
Operating System: Linux 2.6.32-504.12.2.el6.x86_64 #1 SMP Wed Mar 11 22:03:14 UTC 2015 x86_64
Java Version: Java 1.7.0_60-b19 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
----------------------------------------------------------------------------------------------------
...
Parallel Computing Toolbox                            Version 6.6        (R2015a)
...

[Walter Roberson]

Have you tried to validate your cluster profile?

[emjey]

See the related discussion here

https://uk.mathworks.com/matlabcentral/answers/92124-why-am-i-unable-to-use-parpool-with-the-local-scheduler-or-validate-my-local-configuration-of-parall

or here

https://uk.mathworks.com/matlabcentral/answers/196549-failed-to-start-a-parallel-pool-in-matlab2015a