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Could not access source collection field in java.util.Collections$UnmodifiableCollection #138

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amy-b-cheng opened this issue Mar 25, 2024 · 0 comments
Open

Could not access source collection field in java.util.Collections$UnmodifiableCollection #138

amy-b-cheng opened this issue Mar 25, 2024 · 0 comments

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@amy-b-cheng
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My application was previously using JDK 11, kryo 5.5.0, and kryo-serializers 0.45.

When I upgrade to JDK 21, I'm getting the following error:
java.lang.RuntimeException: Could not access source collection field in java.util.Collections$UnmodifiableCollection. at de.javakaffee.kryoserializers.UnmodifiableCollectionsSerializer.<clinit>(UnmodifiableCollectionsSerializer.java:62)
and
java.lang.reflect.InaccessibleObjectException: Unable to make field final java.util.Collection java.util.Collections$UnmodifiableCollection.c accessible: module java.base does not "opens java.util" to unnamed module @18acfe88

Is this a known problem with JDK 21?
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