Why is there a ~1 hour delay before a submitted job appears in Job Monitor?

I am attempting to submit parallel jobs to a MATLAB Distributed Computing Server. After I submit a job, it takes approximately an hour for the job to appear in the Job Monitor. This also only occurs for the first job submitted on a new MATLAB session -- subsequent jobs appear in the Job Monitor shortly after submission.

Why is there such a delay between when the first job is submitted and when it appears in the Job Monitor?

Answer 1

[MathWorks Support Team]

This issue may be due to a stale entry on the license search path.

Complete the following steps to help determine if this may be the cause of the delays: 

1. Open a new instance of MATLAB. 
2. Run the following command: 

tic; system_dependent('lmfeaturelist', 2); toc 

If this command takes more than 2 minutes to run, feel free to stop execution. 

 

Typical execution times for the check are between 0 to 10 seconds. Longer execution times of 10 seconds to 2 minutes indicate latency to license servers. Times greater than 2 minutes indicate a stale network license entry on the license search path. If this is the case, use the "-c" startup flag to test each entry on the license search path to determine which may be causing the delays.

There are two ways you may use the “-c” flag to test license path entries: 

A. Start MATLAB from the system command line with the “-c” flag. Do this for each license path entry, until you determine which is causing the delay. For information on how to execute this command, refer to the following documentation links: 

https://www.mathworks.com/help/matlab/matlab_env/commonly-used-startup-options.html 

https://www.mathworks.com/help/matlab/ref/matlabwindows.html 

B. Edit the “Target” of the MATLAB shortcut to include the “-c” flag. For each entry on the license path, make this change, then attempt to start MATLAB. For information on how to do this, refer to the following documentation link: 

https://www.mathworks.com/matlabcentral/answers/102520-how-do-i-change-the-license-search-location-for-matlab 

To determine all entries being searched along your license path, refer to the following:  

https://www.mathworks.com/matlabcentral/answers/254541-what-is-the-license-file-search-path-for-matlab