Parpool and matlabpool stuck (busy), but local cluster profile validates

When I try to use the commands matlabpool open or parpool, it remains stuck at 'busy'. However, when I go to the cluster profile manager and click validate, all the tests successfully validate.

I am using Matlab 2014a. I also have 2013a installed, and matlabpool does not work properly there either.

How do I get parpool working?

Answer 1

[Jeffrey Chiou]

Solved it.

If the startup.m function has an 'input' command, parpool will not start. The 'keyboard' command in startup.m will prevent parpool from starting too. I haven't tested other commands, but I suspect functions that require user input will cause this bug as well.

Simple variable assignments in startup.m will not affect parpool. It's a shame because I would like to keep my startup.m the same and use the parallel toolbox.

[Stephen Lee]

I had a similar issue with my Cluster Profile Manager validation being stuck on "Job test (createJob)".

Disabling startup.m inputs fixed the issue! Thanks for sharing!!