Problem solved. Must register Kotlin module if using kotlin. Although I think this problem is interesting too.
-- You received this message because you are subscribed to the Google Groups "jackson-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/jackson-user/d99bc57f-3d7d-4518-9c94-07d1212f2b29%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
