Why do I get "failed to register worker" in the Admin Center?

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MathWorks Support Team on 26 Nov 2018

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https://www.mathworks.com/matlabcentral/answers/432125-why-do-i-get-failed-to-register-worker-in-the-admin-center

Edited: MathWorks Support Team on 2 Nov 2022

In the Admin Center, under MJS Connection there is the error "Failed to register worker". Connectivity tests all pass, what is the failure?

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Answer 1

MathWorks Support Team on 2 Nov 2022

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Edited: MathWorks Support Team on 2 Nov 2022

"Failed to register worker" typically means there is a mismatch between nodes on the cluster. Check the $matlabroot\toolbox\distcomp\bin\mjs_def file to see if there are any differences in it across the nodes. Differing security levels or "MJS_ADDITIONAL_MATLABROOTS" will need to be corrected so that each node is using the same mjs_def file.

If the mjs_def files are identical, check to see that each node has the extra installations as defined in the MJS_ADDITIONAL_MATLABROOTS flag. If any one of the nodes has that extra MJS release missing, it can cause errors for the job manager. Correcting it so that each node is in sync should resolve the issue.