On 29/09/2023 3:38 pm, Alan Bateman wrote:


On 28/09/2023 21:42, daniel.daughe...@oracle.com wrote:
java.lang.instrument is owned by the Serviceability Team so I'm redirecting this
message to that alias...

This doesn't look like a JDK issue, instead it looks like |com.github.jelmerk.ObjectSizeFetcher has an Instrumentation field that is null. SO is a reasonable place to discuss usage issues like this although I see one of the answers about agents getting its own class loader is confusing as the agent class is loaded by the application class loader, the VM doesn't create a class loader for agents.|

I guess a potential JDK issue is what has changed since 17 to cause this to no longer work?

David

-Alan.

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