Thank you! I indeed saw another thread that looked like it, but I wasn't aware that the problem had been fixed already.
Thisindeed seems similar to my stack trace.
-Floris
________________________________________
From: Sergei Kornilov <sk@zsrv.org>
Sent: Monday, March 25, 2019 1:57 PM
To: Floris Van Nee; pgsql-bugs@postgresql.org
Subject: Re: parallel query hangs - impossible to cancel [External]
Hi
seems similar to my bugreport 15585 [1] and few others threads.
This bug should be already fixed in stable branch and will be shipped in next minor release (11.3 in may). Thread with
patchwas here: https://www.postgresql.org/message-id/flat/20190207014719.GJ29720%40telsasoft.com
[1] https://www.postgresql.org/message-id/flat/15585-324ff6a93a18da46%40postgresql.org
regards, Sergei