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#jackson

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Question1 answer1,083 followingPosted 14 Jul 2024, 11:27 UTC89.1K views992 votes

owner answered

JSON Duplicate Key Behavior in Jackson 2.17 Across Parsing Modes

Configuration Transition Challenge The Jackson JSON processor underwent significant changes in version 2.17 regarding duplicate key handling in objects. While previous versions defaulted to last-wins semantics with optional configuration to reject duplicates, the latest release introduces stricter validation modes that may alter existing parsing behavior. Or

Community & Careers · Editorial question

Community & Careers

Question1 answer3,439 followingPosted 09 May 2023, 07:31 UTC99.5K views1,691 votes

owner answered

Dropwizard Jackson deserializes offset‑less LocalDateTime as UTC, causing regional time shifts

Symptom When a JSON payload contains a LocalDateTime or ZonedDateTime without an explicit offset (e.g., "2026-10-10T14:30:00" ), Dropwizard’s configured ObjectMapper interprets the value in UTC. This behavior is implicit because the framework registers the JavaTimeModule and disables timestamp serialization, but it never sets a default deserialization timezo

Community & Careers · Editorial question

timezone

dropwizard java-time

json-parser

duplicate-keys

java

Ari Indigo

Asked14 Jul 2024, 11:27 UTC

Level 1New User rank0 rep points

Tasadduq Burneyowner

answered14 Jul 2024, 21:38 UTC

Level 38Owner34,775 rep points

Cig Sage

Asked09 May 2023, 07:31 UTC

Level 1New User rank0 rep points

Tasadduq Burneyowner

answered09 May 2023, 12:56 UTC

Level 38Owner34,775 rep points