Jackson Release 2.6.6

Patch version of 2.6, released April 5th, 2016.

This is planned to be the last full 2.6 release of all components: further releases, if any, will be micro-releases (like next hypothetical one, 2.6.6.1) of specific components with issues.

Changes, core

Streaming

• #248: VersionUtil.versionFor() unexpectedly return null instead of Version.unknownVersion()

Databind

• #1088: NPE possibility in SimpleMixinResolver
• #1099: Fix custom comparator container node traversal
• #1108: Jackson not continue to parse after DeserializationFeature.FAIL_ON_INVALID_SUBTYPE error
• #1112: Detailed error message from custom key deserializer is discarded
• #1120: String value omitted from weirdStringException
• #1123: Serializing and Deserializing Locale.ROOT

Changes, dataformats

Avro

• #41: Problems with type Number, with schema

CBOR

• #18: Correct parsing of zero length byte strings

Smile

• #34: Deserialize error "Invalid type marker byte" for 'long' field names (57 characters or longer)

Changes, data types

Joda

• #82: Can't deserialize a serialized DateTimeZone with default typing

Java 8 Date/Time

• #16: Instant is serialized as String by some dataformats/libs but can't be deserialized (unless manually converted to float)
• #69: Serialization of Instant seems to throw exceptions when when @JsonFormat is used

Changes, other

Jackson-jr

• #40: Cannot read empty or singleton arrays with JSON.arrayOfFrom