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In "Help > Eclipse Marketplace" install "Java 17 Support for Eclipse 2021-09 (4.21)" (Don't need patch sourcesaccept default packages). This should not be needed for Eclipse 2021-12.


    Default VM arguments: -XX:HotswapAgent=fatjar --add-exports=java.base/


The "--add-exports" is not required for hotswap but is required to run WebObjects applications in Java 17.


Some versions of macOS may prevent this java from running because of security quarantining. Try removing quarantine from java folder.

sudo xattr -r -d /Library/Java/JavaVirtualMachines/jbrsdk_dcevm-17_0_1-osx-x64-b164.4

DCEVM and Hotswap Agent for Java 8