juanotto opened a new issue, #8903:
URL: https://github.com/apache/netbeans/issues/8903
### Apache NetBeans version
Apache NetBeans 27
### What happened
When a new Netbeans Platform Application is created, running it throws
`java.lang.reflect.InaccessibleObjectException`.
The maven archetype includes `jpms-flags` for the app module but they don't
seem to apply to runtime. Taking out the jpms-flag for java breaks the build,
but taking it out or adding it back doesn't seem to have any effect when
running the application.
Stacktrace when running the application includes:
```
SEVERE: No way to find original stream handler for jar protocol
java.lang.reflect.InaccessibleObjectException: Unable to make field
transient java.net.URLStreamHandler java.net.URL.handler accessible: module
java.base does not "opens java.net" to unnamed module @3b07d329
at
java.base/java.lang.reflect.AccessibleObject.throwInaccessibleObjectException(AccessibleObject.java:353)
at
java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:329)
at
java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:277)
at
java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:179)
at java.base/java.lang.reflect.Field.setAccessible(Field.java:173)
at
org.netbeans.ProxyURLStreamHandlerFactory.register(ProxyURLStreamHandlerFactory.java:59)
at org.netbeans.JarClassLoader.<clinit>(JarClassLoader.java:143)
at org.netbeans.MainImpl.execute(MainImpl.java:166)
at org.netbeans.MainImpl.main(MainImpl.java:60)
at org.netbeans.Main.main(Main.java:58)
```
The application can run, it just has no access to `java.net`.
### Language / Project Type / NetBeans Component
Netbeans Platform
### How to reproduce
Create a new Netbeans application, build and run it.
Note: you may need to take out the security-manager flag as per
https://github.com/apache/netbeans-mavenutils-archetype-netbeans-platform-app-archetype/pull/19
### Did this work correctly in an earlier version?
No / Don't know
### Operating System
Both Windows 10 and Ubuntu 24
### JDK
Oracle jdk-24
### Apache NetBeans packaging
Apache NetBeans platform
### Anything else
I created a PR that solves the issue, but I suspect there are better ways.
See
https://github.com/apache/netbeans-mavenutils-archetype-netbeans-platform-app-archetype/pull/20
I couldn't find information on who processes the jpms-flags used in the pom.
That may be a better place to actually use the same flags on runtime. Is the
`nbm-maven-plugin`?
### Are you willing to submit a pull request?
Yes
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