jackson报错：com.fasterxml.jackson.databind.JsonMappingException: Incompatible Jackson version: 2.9.6

spark读取elasticsearch的时候，出错了，报错

com.fasterxml.jackson.databind.JsonMappingException: Incompatible Jackson version: 2.9.6

Exception in thread "main" java.lang.ExceptionInInitializerError
    at org.apache.spark.rdd.RDD.withScope(RDD.scala:362)
    at org.apache.spark.rdd.RDD.map(RDD.scala:369)
    at org.apache.spark.rdd.PairRDDFunctions.values(PairRDDFunctions.scala:1163)
    at Test$.main(Test.scala:14)
    at Test.main(Test.scala)
Caused by: com.fasterxml.jackson.databind.JsonMappingException: Incompatible Jackson version: 2.9.6
    at com.fasterxml.jackson.module.scala.JacksonModule$class.setupModule(JacksonModule.scala:64)
    at com.fasterxml.jackson.module.scala.DefaultScalaModule.setupModule(DefaultScalaModule.scala:19)
    at com.fasterxml.jackson.databind.ObjectMapper.registerModule(ObjectMapper.java:751)
    at org.apache.spark.rdd.RDDOperationScope$.<init>(RDDOperationScope.scala:82)
    at org.apache.spark.rdd.RDDOperationScope$.<clinit>(RDDOperationScope.scala)
    ... 5 more

因为我的pom.xml配置是spark2.0版本的，因为我的spark2.0版本依赖Jackson版本是2.6+的

所以我们只需要将Jackson2.6版本的引入即可，

<dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.6.6</version>
    </dependency>

如果还有错，那么可能是其他包引入了jackson的高版本，在其中将jackson的自动引入剔除即可，

<dependency>
    <groupId> org.apache.kafka</groupId>
    <artifactId>kafka_2.11</artifactId>
    <version>1.1.1</version>
    <exclusions>
        <exclusion>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>*</artifactId>
        </exclusion>
    </exclusions>
</dependency>