Jackson Release 2.12.4

Patch version of 2.12 is under development as of April 2021.

Following fixes will be included in this patch release.

Changes, core

Streaming

No changes since 2.12.3

Databind

• #3139: Deserialization of "empty" subtype with DEDUCTION failed

Changes, data formats

XML

• #469: Empty tags cause incorrect deserialization of unwrapped lists
• #473: Parsing of null Integer fields changed behavior between version 2.11 and 2.12

Changes, Java 8 modules

• #214: readerForUpdating(objectToUpdate).readValue(json) behaves unexpectedly on Optional

Changes, other modules

Afterburner

• #131: Failing to serialize Thread returned by Thread.currentThread() when Afterburner or Blackbird registered

Mr Bean

• #132: (partial fix) Prevent materialization of java.util.TimeZone