Re: module java.base does not "opens java.lang" to unnamed module

This is because, from Java 9, access to the Java classes has been restricted.  More info:  https://stackoverflow.com/questions/41265266/how-to-solve-inaccessibleobjectexception-unable-to-make-member-accessible-m

In the case of GWT, if you want exceptions passed back via RPC, GWT needs access to the java.lang classes to serialise them to contain all the Java class details.

So, you need to add:  --add-opens java.base/java.lang=ALL-UNNAMED  when running.

I didn't know it was not recommended.  Why is it bad to do?

On Saturday 22 June 2024 at 3:34:59 am UTC+10 Tim Macpherson wrote:

It happens with the latest tbroyer archetype, just change the server method so it always throws 

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On Fri, Jun 21, 2024 at 4:20 PM, Colin Alworth

<co...@colinalworth.com> wrote:

Can you share a little more detail, like the full error message with stack trace, and the GWT version you're using? Some improvements were made in this area for GWT 2.11, and some messages of this kind are merely warnings, indicating that reflection was attempted and some fallback can usually be used instead.

On Friday, June 21, 2024 at 8:45:59 AM UTC-5 tim_mac...@yahoo.co.uk wrote:

SInce upgrading to Java 11,  throwing a new IllegalArgumentException in an RPC server-side implementation gives  InaccessibleObjectException. It can be stopped by using a VM argument --add-opens, but apparently this is not recommended.
Can anyone  clarify ?

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