Elastic4S -杰克逊的类ScalaObjectMapper找不到并抛出一个NoSuchMethodError

Question

在Scala项目中使用Elastic4S时，我遇到了问题。引发以下错误：

com.fasterxml.jackson.module.scala.experimental.ScalaObjectMapper.$init$(Lcom/fasterxml/jackson/module/scala/experimental/ScalaObjectMapper;)V：

java.lang.NoSuchMethodError

其次是：

java.lang.NoClassDefFoundError:无法初始化类com.sksamuel.elastic4s.json.JacksonSupport$

下面是所使用的依赖关系：

  "com.sksamuel.elastic4s"       %% "elastic4s-core"              % "6.7.3",
  "com.sksamuel.elastic4s"       %% "elastic4s-http"              % "6.7.3",
  "com.github.swagger-akka-http" %% "swagger-akka-http"           % "2.0.4",
  "com.github.swagger-akka-http" %% "swagger-scala-module"        % "2.0.5",
  ...
  ),
  assemblyMergeStrategy in assembly := { _ => MergeStrategy.first }

从Elastic4s启动的唯一代码是在以下方法中：

  def testClusterUp(log: LoggingAdapter): Unit = {
    val response: Response[NodeInfoResponse] = client.execute(
      nodeInfo()
    ).await

    if (response.isError) {
      log.error(s"[ERROR]-[ELASTICSEARCH] $response")
      throw new ExceptionInInitializerError(s"an error occurred during Elastic connector initialization : ${response.error}")
    } else if (response.isSuccess) {
      log.info("Cluster started successfully !")
    }
  }

如能提供任何帮助，将不胜感激。

Answer 1

似乎还有一些其他的依赖项正在覆盖这个依赖项。例如，swagger-akka-http使用了杰克逊-scala模块的另一个版本，并且不能在不对build.sbt进行一些调整的情况下将其包括在内。在这种情况下，应该采用以下配置：

("com.github.swagger-akka-http" %% "swagger-akka-http"    % "2.0.4") excludeAll(ExclusionRule(organization = "com.fasterxml.jackson.module")),
("com.github.swagger-akka-http" %% "swagger-scala-module" % "2.0.5") excludeAll(ExclusionRule(organization = "com.fasterxml.jackson.module")),

请参阅有关sbt依赖项的排除规则的更多信息：https://www.scala-sbt.org/release/docs/Library-Management.html#Exclude+Transitive+Dependencies