[GitHub] incubator-spark pull request: SPARK-1078: Replace lift-json with j...

[willb]

Github user willb commented on the pull request:

    https://github.com/apache/incubator-spark/pull/582#issuecomment-34834423
  
    The current version of json4s-jackson depends on paranamer 2.6, while the 
current version of lift-json depends on 2.4.1.  That's the only difference that 
winds up getting pulled in by a Spark build, although json4s has an optional 
extension (not currently exercised by Spark AFAICT) to use joda-time 2.3 and 
joda-convert 1.5.  Lift's dependencies on these joda libraries (also not 
exercised by Spark AFAICT) are on versions 2.1 and 1.2, respectively.
    
    FasterXML claims that subsequent Jackson minor releases in a major series 
are backwards-compatible; looking at the version history, it doesn't appear 
that anything critical has been removed from 2.2.2 to 2.3.