[Qgis-developer] [QA] CSV Test Flaky

[Chris Crook]

Hi All

Thanks for alert to this message Matthias.. you recall correctly that I am author of these tests.

There is one test which I might have expected to be flaky, which is the test for the file watcher (test 29) - and in retrospect I'm not sure of the value of that feature in any case.  In order to make that test work it needs to sleep for a bit and to call  QCoreApplication.instance().processEvents().  However from the log file it appears to have successfully passed that test.

After that the tests are all very routine I would have thought - the last test for which there is output, which is test31, is filtering using a spatial index.  On the face of it this sounds very straightforward code to me, and not likely to result in a timeout.  OTOH this code was built before multithreaded rendering so there is a possibility of some sort of thread insecurity I suppose ... if multithreading in used in the test at all.

In summary I don't have any immediate thoughts as to why it could be ... thoughts anyone?

Cheers
Chris


________________________________________
From: Matthias Kuhn [matthias at opengis.ch
Sent: 01 December 2015 03:47
To: qgis-developer; Chris Crook
Subject: [QA] CSV Test Flaky

Hi,

The PyQgsDelimitedTextProvider is flaky for as long as I remember.
It runs into a timeout every once in a while (e.g. here https://travis-ci.org/qgis/QGIS/jobs/93937729#L1285 http://tinyurl.com/pcepj9t)
I guess it runs into a deadlock given that normally it finishes in ~12s and a timeout requires 600s to trigger.
Does anybody have a guess what could be the source of the problem?

Does somebody have a suspicion what could be going on? If yes, please try to find a way to add debug output to verify your guesses.
I will probably disable the test the next time I witness false alarms, I hope somebody jumps in before :)

Matthias

--
Matthias Kuhn
OPENGIS.ch - https://www.opengis.ch
Spatial • (Q)GIS • PostGIS • Open Source


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