id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	launchpad_bug
4126	CI test_system fails inconsistently	hacklschorsch	hacklschorsch	"CI reactors under `test.test_system` on CircleCI fail inconsistently ONLY in the Tahoe-lafs Circle CI org.  
Cannot reproduce locally on Nixos nor on GitHub CI (inside similar docker images).

Possible root cause discussed in https://github.com/tahoe-lafs/tahoe-lafs/pull/1381#issuecomment-2476885548 meejah writes:

> The unclean-reactor errors may be simply a downstream symptom of the real errors that also happen in that run (e.g. several tests time out).

My own tests suggest that indeed, raising the SystemTests timeout make [https://github.com/tahoe-lafs/tahoe-lafs/pull/1381#issuecomment-2444698978 a couple of flaky tests] much more stable:

|| Failure count || Test name ||
||     1 || allmydata.test.test_system.HTTPSystemTest.test_mutable_mdmf ||
||     3 || allmydata.test.test_system.HTTPSystemTest.test_mutable_sdmf ||
||    30 || allmydata.test.test_system.HTTPSystemTest.test_upload_and_download_convergent ||
||    11 || allmydata.test.test_system.HTTPSystemTest.test_upload_and_download_random_key ||

This ticket is similar but not equal to ticket:4085, ticket:4022, ticket:2994 ."	defect	assigned	normal	undecided	dev-infrastructure	n/a		ci