Eclipse 2023-03 crashes with old eclipse.ini +UseZGC

Question

When running eclipse 2023-03 with old eclipse.ini (or after upgrading 2022-03) eclipse doesn't start anymore and nothing is found in workspace/.metadata/log, or in console.

The old eclipse.ini had the following vmargs that worked

-vmargs
-XX:+UseZGC
-javaagent:lombok-1.18.26--withMapstruct-1.4.2.Final.jar
-XX:+UnlockExperimentalVMOptions
-XX:+UnlockDiagnosticVMOptions
-XX:+AlwaysPreTouch
-XX:+AggressiveOpts
-XX:ZAllocationSpikeTolerance=1
-XX:InitialHeapSize=6G
-XX:MaxRAM=6G
-XX:MaxHeapSize=6G
-XX:MaxDirectMemorySize=1G
--illegal-access=permit
#for objectaid - https://stackoverflow.com/questions/68589918/objectaid-unhandled-event-loop-exception/70785096#70785096
--add-opens=java.base/java.lang=ALL-UNNAMED
--add-opens=java.base/java.util=ALL-UNNAMED
--add-opens=java.base/java.text=ALL-UNNAMED
--add-opens=java.desktop/java.awt.font=ALL-UNNAMED
-Dosgi.requiredJavaVersion=17
[email protected]/eclipse-workspace
-Dosgi.dataAreaRequiresExplicitInit=true
-Dorg.eclipse.swt.graphics.Resource.reportNonDisposed=true
-Dsun.java.command=Eclipse
-Xms256m
-Xmx2048m
-XX:+UseG1GC
-XX:+UseStringDeduplication
--add-modules=ALL-SYSTEM

Answer 1

Having two -XX:+UseZGC and -XX:+UseG1GC had conflicts that before where ignored but now do not work anymore.

Test by yourself directly on jvm

λ java -XX:+UseG1GC -XX:+UseZGC
Error occurred during initialization of VM
Multiple garbage collectors selected