render process was terminated: TS_PROCESS_WAS_KILLED

My code uses parfeval to run a function @pcal simutaneously on 12 workers. When I start the code, everything runs smoothly but after some time when I come back, the command window appears:

render process was terminated: TS_PROCESS_WAS_KILLED

And instead of 12 workers, only 6 or 7 workers are running.

What does that mean? Does it mean that the other workers have finished their jobs? BTW, I run my codes using shared computing resources on a platform, something like AWS.

Here's my code:

% some parameters
col=4;
yearsbf=10;
numofwk=12;
wkofeach=floor((length(MatchResult)-idfinish)/numofwk);
f(1:numofwk) = parallel.FevalFuture;

% using parallel workers
for i=1:numofwk
    if i<numofwk
        task=MatchResult((i-1)*wkofeach+1:i*wkofeach,:); % MatchResult is a matrix that contains raw data
    elseif i==numofwk
        task=MatchResult((i-1)*wkofeach+1:end,:);
    end
    stklist=unique(task(:,2));
    bread=MatchResult(matches(MatchResult(:,2),stklist),:);
    f(i)=parfeval(@pcal, task, bread, col, yearsbf);
end

% fetch results
Fetch=cell(numofwk,1);
for i=1:numofwk
    [id,fetch_id] = fetchNext(f);
    Fetch{id}=fetch_id;
end

Answer 1

[Raymond Norris]

I suspect worker(s) are crashing because of out of memory issues. What size AWS instance are you using? Do you have a sense of how much memory each of the tasks require when calling pcal?