sjm fails with Graal (Java17)

[chrishpowell]

sjm fails using Graal (Java 17) with

Exception in thread "main" java.lang.ExceptionInInitializerError
	at org.simplejavamail.internal.clisupport.serialization.SerializationUtil.initKryo(SerializationUtil.java:43)
	at org.simplejavamail.internal.clisupport.serialization.SerializationUtil.<clinit>(SerializationUtil.java:36)
	at org.simplejavamail.internal.clisupport.CliSupport.produceCliDeclaredOptionSpec(CliSupport.java:57)
	at org.simplejavamail.internal.clisupport.CliSupport.<clinit>(CliSupport.java:47)
	at org.simplejavamail.cli.SimpleJavaMail.main(SimpleJavaMail.java:31)
Caused by: java.lang.RuntimeException: Could not access source collection field in java.util.Collections$UnmodifiableCollection.
	at de.javakaffee.kryoserializers.UnmodifiableCollectionsSerializer.<clinit>(UnmodifiableCollectionsSerializer.java:62)
	... 5 more
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field final java.util.Collection java.util.Collections$UnmodifiableCollection.c accessible: module java.base does not "opens java.util" to unnamed module @7e9a5fbe
	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 de.javakaffee.kryoserializers.UnmodifiableCollectionsSerializer.<clinit>(UnmodifiableCollectionsSerializer.java:55)
	... 5 more

sjm works fine with Java 11.

[bbottema]

Hmm, sounds more like an issue with Kryo in Graal. Not sure what I can do about this, unfortunately.

[chrishpowell]

It seems like this won't get fixed until Kryo v6: EsotericSoftware/kryo#885

[bbottema]

Well, there's nothing I can do here it seems. Closing until I can do more.