The tests in SessionStartupDoesNotBlockMainThreadTest use detection of the main thread being blocked. Right now, they use system properties to configure vertx.logger-delegate-factory-class-name and override the logger to detect it. This seems to be flaky and failing in some environments (e.g. on MaxOS with OPenJDK, when running the tests from CLI with mvn install). They were therefore disabled for the time being.
Vert.x 4.3.0 brings a new possibility to configure blockedThreadChecker (see eclipse-vertx/vert.x#4283). We should move to that once we upgrade to Vert.x 4.3.0 and re-enable the tests.
Created by Strimzi#6741