[jira] [Created] (JOHNZON-347) Mapper.writeArray() fails on JDK 17

["Christoph Dreis (Jira)" <ji...@apache.org>]

Christoph Dreis created JOHNZON-347:
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             Summary: Mapper.writeArray() fails on JDK 17
                 Key: JOHNZON-347
                 URL: https://issues.apache.org/jira/browse/JOHNZON-347
             Project: Johnzon
          Issue Type: Bug
          Components: Mapper
    Affects Versions: 1.2.13
            Reporter: Christoph Dreis


Hi,

I've noticed that Mapper.writeArray fails on JDK 17 due to [https://openjdk.java.net/jeps/403] strongly encapsulating internals now. To reproduce just run `JohnzonJsonbTest` with JDK 17 (build 25 at least to include JEP 403). You will see stacktraces like the following:

```

java.lang.reflect.InaccessibleObjectException: Unable to make field private final java.lang.Object[] java.util.Arrays$ArrayList.a accessible: module java.base does not "opens java.util" to unnamed module @4361bd48java.lang.reflect.InaccessibleObjectException: Unable to make field private final java.lang.Object[] java.util.Arrays$ArrayList.a accessible: module java.base does not "opens java.util" to unnamed module @4361bd48
 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.apache.johnzon.mapper.access.FieldAccessMode$FieldDecoratedType.<init>(FieldAccessMode.java:105) at org.apache.johnzon.mapper.access.FieldAccessMode$FieldReader.<init>(FieldAccessMode.java:169) at org.apache.johnzon.mapper.access.FieldAccessMode.doFindReaders(FieldAccessMode.java:49) at org.apache.johnzon.mapper.access.BaseAccessMode.findReaders(BaseAccessMode.java:82) at org.apache.johnzon.mapper.access.FieldAndMethodAccessMode.doFindReaders(FieldAndMethodAccessMode.java:68) at org.apache.johnzon.mapper.access.BaseAccessMode.findReaders(BaseAccessMode.java:82) at org.apache.johnzon.jsonb.JsonbAccessMode.findReaders(JsonbAccessMode.java:468) at org.apache.johnzon.mapper.access.KnownNotOpenedJavaTypesAccessMode.findReaders(KnownNotOpenedJavaTypesAccessMode.java:182) at org.apache.johnzon.mapper.Mappings.createClassMapping(Mappings.java:475) at org.apache.johnzon.mapper.Mappings.doFindOrCreateClassMapping(Mappings.java:437) at org.apache.johnzon.mapper.Mappings.findOrCreateClassMapping(Mappings.java:411) at org.apache.johnzon.mapper.Mapper.isDeduplicateObjects(Mapper.java:202) at org.apache.johnzon.mapper.Mapper.writeObjectWithGenerator(Mapper.java:196) at org.apache.johnzon.mapper.Mapper.writeObject(Mapper.java:189) at org.apache.johnzon.mapper.Mapper.writeObject(Mapper.java:217) at org.apache.johnzon.mapper.Mapper.writeArray(Mapper.java:104) at org.apache.johnzon.jsonb.JohnzonJsonb.toJson(JohnzonJsonb.java:390)

```

I didn't find a quick way to fix this, but let me know if I can help.

 

Cheers,

Christoph



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