Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc> writes:
> hmm - will look into that in a bit - but I also just noticed that on the
> same day spoonbill broke there was also a commit to that file
> immediately before that code adding the fflush() calls.
It's hard to see how those would be related to this symptom. My bet
is that the new fk-deadlock test exposed some pre-existing issue in
isolationtester. Not quite clear what yet, though.
A different line of thought is that the cancel was received by the
backend but didn't succeed in cancelling the query for some reason.
regards, tom lane