anton created NETBEANS-6416:
-------------------------------

             Summary: No way to find original stream handler for jar protocol
                 Key: NETBEANS-6416
                 URL: https://issues.apache.org/jira/browse/NETBEANS-6416
             Project: NetBeans
          Issue Type: Bug
          Components: platform - JDK Problems
    Affects Versions: 12.6
         Environment: Windows 10,

Openjdk 17,

Netbeans 12.6

Netbeans API versions: RELEASE126

 
            Reporter: anton


We're currently trying to migrate a Netbeans platform project from java 1.8 to 
17, and are running into multiple Netbeans related problems. When launching the 
application, the very first error that is occurring is the following: 
{code:java}
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 @448139f0
    at 
java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
    at 
java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
    at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:178)
    at java.base/java.lang.reflect.Field.setAccessible(Field.java:172)
    at 
org.netbeans.ProxyURLStreamHandlerFactory.register(ProxyURLStreamHandlerFactory.java:59)
    at org.netbeans.JarClassLoader.<clinit>(JarClassLoader.java:117)
    at org.netbeans.MainImpl.execute(MainImpl.java:153)
    at org.netbeans.MainImpl.main(MainImpl.java:60)
    at org.netbeans.Main.main(Main.java:58){code}
{{{}{}}}I've tried adding -J--add-opens java.base/java.net=ALL-UNNAMED to the 
maven-compiler-plugin in multiple modules to try and fix the problem, but it 
doesn't seem to work.



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