21:09:12 [INFO] --- tycho-source:5.0.1-SNAPSHOT:plugin-source (plugin-source) @ org.eclipse.xtext.tests ---
21:09:12 [INFO] Building jar: /home/jenkins/agent/workspace/xtext_cd_tycho50/org.eclipse.xtext.tests/target/org.eclipse.xtext.tests-2.41.0-SNAPSHOT-sources.jar
21:10:09
21:10:09 Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "Worker-0"
21:10:41
21:10:41 Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "HttpClient-4-SelectorManager"
21:10:53
21:10:53 Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "HttpClient-6-SelectorManager"
21:10:58
21:10:58 Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "HttpClient-5-SelectorManager"
21:11:05
21:11:05 Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "HttpClient-3-SelectorManager"

from

https://ci.eclipse.org/xtext/job/xtext/job/cd_tycho50/948/console

@laeubi was there some recent changes to the tycho-source logic?