Build Problems on Tycho 5.0.x

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?

Start with the linked cd_tycho50/948 console log and the tycho-source 5.0.1-SNAPSHOT plugin-source phase shown in the report. Trace the OutOfMemoryError during the Xtext tests source JAR build and determine what change is needed for the Tycho 5.0.x build to complete without those errors.