Issues

• Non-blocking parser: hex number length check consistency

  FasterXML/jackson-core#1765 · Filter by author pjfanning opened on Oct 11, 2026

• UTF8DataInputJsonParser reports end-of-input as JacksonIOException instead of UnexpectedEndOfInputException

  FasterXML/jackson-core#1761 · Filter by author cowtowncoder opened on Oct 11, 2026

• Shared handling of Jackson-owned Writer over caller's OutputStream (non-UTF-8 generators, textual backends)

  FasterXML/jackson-core#1740 · Filter by author cowtowncoder opened on Oct 6, 2026

• maxStringLength is not enforced when skipping String values

  FasterXML/jackson-core#1735 · Filter by author Dongnyoung opened on Oct 3, 2026
  2

  

• Consider validating raw unpaired UTF-16 surrogates in ReaderBasedJsonParser

  FasterXML/jackson-core#1705 · Filter by author elang2 opened on Sep 12, 2026
  5

• Avoid per-character escape-table load in _writeStringSegment ASCII loop

  FasterXML/jackson-core#1680 · Filter by author franz1981 opened on Sep 1, 2026
  10

• Non-root number separator validation not applied to non-blocking (async) parser (follow-up to #1557)

  FasterXML/jackson-core#1640 · Filter by author seonwooj0810 opened on Jul 24, 2026

• Add support for char-based NonBlockingInputFeeder

  FasterXML/jackson-core#1604 · Filter by author robtimus opened on Apr 29, 2026
  2

• Parsing for non-root number values fails lazily

  3.x
  FasterXML/jackson-core#1557 · Filter by author cowtowncoder opened on Feb 25, 2026
  1

• Implement novel, branch-free JSON escaping algorithm

  FasterXML/jackson-core#1384 · Filter by author franz1981 opened on Jan 10, 2025
  6

• JDK compatibility issues with jackson-core 2.14 and later due to Multi-Release (MR) jars

  will-not-fix
  FasterXML/jackson-core#1210 · Filter by author techwhizbang opened on Feb 6, 2024
  9

• Allow suppresion of source information in exception messages

  FasterXML/jackson-core#1158 · Filter by author jamesagnew opened on Dec 6, 2023
  9

• Explicitly indicate Nullability of arguments and return values (JSpecify) -- for 3.3?

  3.x
  FasterXML/jackson-core#1105 · Filter by author k163377 opened on Sep 9, 2023
  13

• Support writing only (some?) longs as strings (opt-in) for Javascript compatibility

  FasterXML/jackson-core#1044 · Filter by author rdesgroppes opened on Jun 12, 2023
  14

• Add support to get canonical JSON output (what is still missing as of 3.0?)

  FasterXML/jackson-core#1037 · Filter by author digulla opened on May 26, 2023
  15

• Can UTF8StreamJsonParser#finishString be made faster with VarHandles?

  3.x
  FasterXML/jackson-core#929 · Filter by author jpountz opened on Feb 27, 2023
  9

• Investigate use of Compact strings for TextBuffer

  FasterXML/jackson-core#910 · Filter by author yawkat opened on Feb 2, 2023
  10

• Add SLSA provenance via build script

  FasterXML/jackson-core#844 · Filter by author pnacht opened on Nov 23, 2022 · 2.15.0
  27

• writeRaw binary content

  FasterXML/jackson-core#914 · Filter by author rashtao opened on Jul 14, 2022
  11

• Allow automatic canonicalization (possibly String.intern()) of JsonToken.VALUE_STRING values

  pr-needed
  FasterXML/jackson-core#726 · Filter by author 1zg12 opened on Nov 17, 2021
  3

• JsonParser.getCurrentLocation is not updated for DataInput input

  FasterXML/jackson-core#601 · Filter by author fabienrenaud opened on Feb 20, 2020
  3

• Can't tell non-blocking parser what charset to use for decoding input

  documentation
  FasterXML/jackson-core#596 · Filter by author mizosoft opened on Feb 6, 2020
  3

• Add vanilla flag for generators

  3.xperformance
  FasterXML/jackson-core#485 · Filter by author cowtowncoder opened on Oct 8, 2018

• Allow registering "string-converter hook", for low-level coercion or String mutation

  3.xmost-wanted
  FasterXML/jackson-core#355 · Filter by author cowtowncoder opened on Feb 22, 2017
  1