[LUCENE-10528] TestScripts.testLukeCanBeLaunched creates X Window when running the tests

• Type: Task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 9.2
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Robert Muir
• Created: 21/Apr/22 19:02
• Updated: 28/Aug/22 16:39
• Resolved: 23/Apr/22 12:03

Description

When running the tests, this one causes my entire desktop to "flicker" when it creates some kind of X-Window very quickly and then destroys it. I use tiling window manager, so whole desktop gets rearranged for a split second, and I'd rather it not happen

I first tried adding -Djava.awt.headless=true to both org.gradle.jvmargs and tests.jvmargs in my .gradle/gradle.properties. doesn't work, as the test doesnt use these when launching luke.

I next tried hacking the test by adding this to the ProcessBuilderThingy, but it didn't help either:

.envvar("LAUNCH_OPTS", "-Djava.awt.headless=true")

One way I can work around it, is to unset DISPLAY env var so that it won't create this window. test still passes:

$ unset DISPLAY
$ ./gradlew :lucene:distribution.tests:test
... (no window gets created)

So maybe as a workaround, we can just not pass DISPLAY environment variable through to this test?

Issue Links

• is related to: LUCENE-10531 Mark testLukeCanBeLaunched @Nightly test and make a dedicated Github CI workflow for it
• links to: GitHub Pull Request #828