杰克逊版太旧了 [英] Jackson version is too old

问题描述

我有以下 build.sbt 文件:

name := "myProject"

version := "1.0"

scalaVersion := "2.11.8"

javaOptions ++= Seq("-Xms512M", "-Xmx2048M", "-XX:MaxPermSize=2048M", "-XX:+CMSClassUnloadingEnabled")


dependencyOverrides ++= Set(
  "com.fasterxml.jackson.core" % "jackson-core" % "2.8.1"
)

// additional libraries
libraryDependencies ++= Seq(
  "org.apache.spark" %% "spark-core" % "2.0.0" % "provided",
  "org.apache.spark" %% "spark-sql" % "2.0.0" % "provided",
  "org.apache.spark" %% "spark-hive" % "2.0.0" % "provided",
  "com.databricks" %% "spark-csv" % "1.4.0",
  "org.scalactic" %% "scalactic" % "2.2.1",
  "org.scalatest" %% "scalatest" % "2.2.1" % "test",
  "org.scalacheck" %% "scalacheck" % "1.12.4",
  "com.holdenkarau" %% "spark-testing-base" % "2.0.0_0.4.4" % "test",
)

但是，当我运行代码时，我得到了这个错误:

However, when I am running the code, I get this error:

An exception or error caused a run to abort. 
java.lang.ExceptionInInitializerError
Caused by: com.fasterxml.jackson.databind.JsonMappingException: Jackson version is too old 2.4.4
    at com.fasterxml.jackson.module.scala.JacksonModule$class.setupModule(JacksonModule.scala:56)
    at com.fasterxml.jackson.module.scala.DefaultScalaModule.setupModule(DefaultScalaModule.scala:19)
    at com.fasterxml.jackson.databind.ObjectMapper.registerModule(ObjectMapper.java:549)
    at org.apache.spark.rdd.RDDOperationScope$.<init>(RDDOperationScope.scala:82)
    at org.apache.spark.rdd.RDDOperationScope$.<clinit>(RDDOperationScope.scala)
    ... 58 more

为什么会这样?我已将更新版本的 Jackson 添加到 dependencyOverrides(在查看此处 Spark Parallelize?(找不到名称为id"的创建者属性))，因此不应使用旧版本.

Why is this the case? I've added a newer version of Jackson to dependencyOverrides(after looking here Spark Parallelize? (Could not find creator property with name 'id')), so an older version shouldn't be used.

推荐答案

jackson-core 和 jackson-databind 版本应该匹配(至少到次要版本，我相信).

jackson-core and jackson-databind versions should match (at least up to the minor version, I believe).

所以删除 dependencyOverrides 并拥有

libraryDependencies ++= Seq(
  ...
  "com.fasterxml.jackson.core" % "jackson-databind" % "2.8.1"
)

或在 dependencyOverrides

dependencyOverrides ++= Set(
  "com.fasterxml.jackson.core" % "jackson-core" % "2.8.1"
  "com.fasterxml.jackson.core" % "jackson-databind" % "2.8.1"
)

虽然我不确定我是否理解你想要做什么；链接的问题似乎说您应该使用旧版本(2.4.4).

Though I'm not sure I understand what you are trying to do; the linked question seems to say that you should used an older version (2.4.4).

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