REPRODUCE WITH: ./gradlew :qa:evil-tests:test \
-Dtests.seed=81D331009B2950AB \
-Dtests.class=org.elasticsearch.monitor.os.EvilOsProbeTests \
-Dtests.method="testOsPrettyName" \
-Dtests.security.manager=false \
-Dtests.locale=ca \
-Dtests.timezone=Asia/Yerevan \
-Dcompiler.java=11 \
-Druntime.java=8
https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+6.x+multijob-unix-compatibility/os=oraclelinux/53/console
The relevant OS name is "Oracle Linux Server 6.9"