parfor loop: Unexpected failure to indicate all intervals added

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jmgoldba 2019-11-2

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评论： jmgoldba 2021-10-6

New to using parfor. Changed 'for' to 'parfor' and subsequently edited code body to remove all errors/warnings. I run I get:

Error using distcomp.remoteparfor/rebuildParforController (line 217)

Unexpected failure to indicate all intervals added.

Error in distcomp.remoteparfor/handleIntervalErrorResult (line 253)

obj.rebuildParforController();

Error in distcomp.remoteparfor/getCompleteIntervals (line 387)

[r, err] = obj.handleIntervalErrorResult(r);

Error in OutTest_VectorGeneric>Criteria_Evaluate (line 110)

parfor j = 1 : numPix

Little to no idea what the error actually means and what I can do on my side to resolve it.

Thanks, -Jesse

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Edric Ellis 2019-11-4

This is an unexpected internal error condition. Does this happen for all parfor loops, or just a specific one? If it happens for all loops, then you might have some sort of installation problem. If it happens for a specific loop, then please could you post a minimal example that demonstrates the problem.

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Answer 1

jmgoldba 2019-11-4

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https://ww2.mathworks.cn/matlabcentral/answers/488795-parfor-loop-unexpected-failure-to-indicate-all-intervals-added#answer_399821

TL;DR Solved it. Thanks for getting back.

I'd blown off a runtime warning about "unitialized temporaries". Don't do that. Especially if the warning includes "a runtime error will occur". Got rid of the warning, got rid of the error. I was probably exhausted at the time from correcting all the static errors and warnings after converting to parfor and at runtime decided to punt :)

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Answer 2

Susan Ding 2021-10-5

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https://ww2.mathworks.cn/matlabcentral/answers/488795-parfor-loop-unexpected-failure-to-indicate-all-intervals-added#answer_802181

Might you explain briefly how to solve it? Thanks.

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jmgoldba 2021-10-6

This is going on a couple years and I don't recall the specific instance. The short story is the runtime error was solved by getting rid of the warning. I don't recall specifically what the solution was to get rid of the warning though it was likely unique to my particular implementation. -Jesse

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