Hi Sanne, The reason the build fails when disabling SerialGC is due to the build process explicitly calling the newly compiled Java with -XX:+UseSerialGC to do small workloads. This is not a bug in the JVM, but rather an unfortunate consequence of the way the build system is structured. I believe you would need to patch out certain uses of -XX:+UseSerialGC in the build process with -XX:+UseG1GC instead for this to work, see for instance the following line that shows up during configure:
checking flags for boot jdk java command for small workloads... -XX:+UseSerialGC -Xms32M -Xmx512M -XX:TieredStopAtLevel=1 I'm not sure whether it is a must to use SerialGC when compiling jmods or doing other small workloads during the build process, but I'm leaning towards it just being there to make the build more efficient best regards, Julian
