java.time.DateTimeException serialization fails

[olibraga]

This code (using version 2.17.2, 2.16.2 and 2.13.5):

  ObjectMapper mapper = new JsonMapper().registerModule(new JavaTimeModule());
  JsonGenerator gen = mapper.createGenerator(System.out);
  gen.writeObject(new java.time.DateTimeException("dummy"));

will throw InvalidDefinitionException with message Java 8 date/time type 'java.time.DateTimeException' not supported by default: add Module "com.fasterxml.jackson.datatype:jackson-datatype-jsr310" to enable handling
which is obviously wrong as JavaTimeModule is added above.

This can be fixed in BeanUtil#checkUnsupportedType(JavaType)
by for example changing line:
if (className.indexOf('.', 10) >= 0) {
to:
if (className.indexOf('.', 10) >= 0 || className.equals("java.time.DateTimeException")) {

[cowtowncoder]

Thank you for reporting this issue! I'll have to think of the best way to handle this.

[cowtowncoder]

Created FasterXML/jackson-databind#4718 for jackson-databind change(s); this issue can remain to allow for adding tests on module side (if any needed)

[cowtowncoder]

Fixed via FasterXML/jackson-databind#4718 for 2.18(.1).

.. . actually will backport in 2.17 (for 2.17.3) as well.