v2025b mjs administration under trixie: restart fails

Dear Community,

I try to run mjs and the associated tools under Debian trixie. mjs shall be run by a non-root user. I can start mjs and restart it. But as soon as I addtionally start the job manager, the mjs restart failes:

me@mymjsserver>sudo -u mathworks -H /usr/local/mathworks/v2025b/toolbox/parallel/bin/mjs restart -clean

WARNING: The mjs script detected that the number of processes allowed

is limited by ulimit. Be sure that the limit of processes for the ROOT user

(or the user running the mjs service) is set to either "unlimited"

or at least 128 * W, where W is the maximum number of MATLAB Parallel

Server workers that will run on this machine.

Stopping the MATLAB Parallel Server...

Stopped MATLAB Parallel Server.

Starting the MATLAB Parallel Server in the background.

me@mymjsserver>sudo -u mathworks -H /usr/local/mathworks/v2025b/toolbox/parallel/bin/mjs restart

WARNING: The mjs script detected that the number of processes allowed

is limited by ulimit. Be sure that the limit of processes for the ROOT user

(or the user running the mjs service) is set to either "unlimited"

or at least 128 * W, where W is the maximum number of MATLAB Parallel

Server workers that will run on this machine.

Stopping the MATLAB Parallel Server...

Stopped MATLAB Parallel Server.

Starting the MATLAB Parallel Server in the background.

me@mymjsserver>sudo -u mathworks /usr/local/mathworks/v2025b/toolbox/parallel/bin/startjobmanager

*** Set Parallel Computing Password ***

You have set user 'admin' to be the administrator for jobmanager serifos on host

serifos.energietechnik.tu-berlin.de. To enable this account, create a password

for user 'admin'.

Password:

Confirm the password:

me@mymjsserver>sudo -u mathworks -H /usr/local/mathworks/v2025b/toolbox/parallel/bin/mjs restart

WARNING: The mjs script detected that the number of processes allowed

is limited by ulimit. Be sure that the limit of processes for the ROOT user

(or the user running the mjs service) is set to either "unlimited"

or at least 128 * W, where W is the maximum number of MATLAB Parallel

Server workers that will run on this machine.

Stopping the MATLAB Parallel Server...

Stopped MATLAB Parallel Server.

ERROR: Found services from

R2025b

You must destroy services from older releases before installing a new version of

MJS. To do this, run "mjs stop -clean" from the old installation or "mjs start

-clean" from the new installation.

me@mymjsserver>

So it seems, that R2025b does not recognize itself.

Any hints welcomme.

Best regards

Frank Huth

[Frank]

The same symptomes are to be observed in case mjs is run under the root account.