cluster connection test parcluster failed

I have been using parallel computing for a couple of weeks now no problem.

Today I went to run a job and Matlab crashed and I had to reset the computer.

Now whenever I try and start a parallel job it errors outs.

If I run the command GCP I get "Starting parallel pool (parpool) using the 'local' profile ... Error using gcp (line 45) Not enough input arguments."

If i go to validate in the cluster profile manager it fails on the first stage (Cluster connection test (parcluster)"

Stage: Cluster connection test (parcluster)
Status: Failed
Description:The validation stage encountered a MATLAB exception.
Command Line Output:(none)
Error Report:
Not enough input arguments.
Debug Log:(none)

Any clue on first steps to sorting this out?

[Paul]

Ok it seems that when I run distcomp.feature( 'LocalUseMpiexec', false ) it fixes the problem.

Can someone explain why though? I thought it had something to do with the firewall so I disabled it but it still wont run if the above is set true.

What difference does it make when running the above false compared to true?

Answer 1

[Daniel Wilusz]

I had the same problem. I followed the instructions here to fix it:

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

In my case, it was step 5 "Clear the local scheduler data folder" that fixed it.