Jackson Release 2.20.1

Jump to bottom

Tatu Saloranta edited this page Oct 27, 2025 · 8 revisions

Patch version of 2.20, under development (October 2025).

Following fixes will be included in this patch release.

Changes, core

Streaming

#1473: Bug with Surrogates + Segments in the UTF8JsonGenerator

Databind

#5292: MapperFeature.FIX_FIELD_NAME_UPPER_CASE_PREFIX does not work with Constructor parameters

Changes, data formats

Avro

#601: Jackson subtype Avro schema unions are non-deterministic and therefore incompatible with each other

CBOR

#599: (cbor) Unable to deserialize stringref-enabled CBOR with ignored properties
#616: CBOR text gets truncated on decoding

Ion

#623: (ion) Upgrade ion-java dep to 1.11.11 (from 1.11.10)