Why do Tasks stay in the 'queued' state while their corresponding Job is in the 'finished' state when using the Parallel Computing Toolbox 4.1 (R2009a)?

I am using a third party scheduler with the Parallel Computing Toolbox 4.1 (R2009a). I use the FINDRESOURCE, CREATEJOB and CREATETASK commands to create a job with corresponding tasks as follows:

sched = findResource();

job1 = createJob(sched);

%Add tasks to the job.

for i = 1:3

      createTask(job1, @rand, 1, {10});

end

% Run the job.

submit(job1);

After submitting the job object, the job’s state Is set to 'finished':

>> job1.State

ans =

finished

However, when I query the state of the created Task, it is still set to 'queued'

>> tasks = get(job1, 'Tasks')

>> tasks(1).State

ans =

queued

Answer 1

[MathWorks Support Team]

In such cases, there is a possibility that the MATLAB code submitted in the Task did not execute and hence the task is still in a 'queued' state.

Execute the following command to view the job's file and check whether MATLAB failed to start up:

getDebugLog(sched,tasks(1))