错误：java.lang.NoSuchMethodError：com.google.common.util.concurrent.MoreExecutors.directExecutor（）Ljava / util / concurrent / Executor;

Question

我得到错误，就像标题一样。 我已经研究过了，发现了一些相似之处，但它并没有对我有所帮助。

• NoSuchMethodError：com.google.common.util.concurrent.MoreExecutors.directExecutor在Elastic Search jar上进行conflits
• Java elasticsearch客户端始终为null
• https://github.com/elastic/elasticsearch/pull/7593
• 弹性搜索开始时的java.lang.NoSuchMethodError
• https://discuss.elastic.co/t/transportclient-in-2-1-x/38818/6

我使用Scala作为编程语言来创建API，而使用Elasticsearch作为数据库。

这是我的代码build.sbt

name := "LearningByDoing"

version := "1.0"

scalaVersion := "2.10.5"

resolvers += "spray repo" at "http://repo.spray.io"
resolvers += "spray nightlies repo" at "http://nightlies.spray.io"

libraryDependencies += "io.spray" % "spray-json_2.10" % "1.3.2"
libraryDependencies += "io.spray" % "spray-can_2.10" % "1.3.2"
libraryDependencies += "io.spray" % "spray-client_2.10" % "1.3.2"
libraryDependencies += "io.spray" % "spray-testkit_2.10" % "1.3.2"
libraryDependencies += "io.spray" % "spray-routing_2.10" % "1.3.2"
libraryDependencies += "io.spray" % "spray-http_2.10" % "1.3.2"
libraryDependencies += "io.spray" % "spray-httpx_2.10" % "1.3.2"
libraryDependencies += "io.spray" % "spray-util_2.10" % "1.3.2"
libraryDependencies += "io.spray" % "spray-can_2.10" % "1.3.2"

libraryDependencies += "mysql" % "mysql-connector-java" % "5.1.12"
libraryDependencies += "org.elasticsearch" % "elasticsearch" % "2.3.1"
libraryDependencies += "com.sksamuel.elastic4s" % "elastic4s-streams_2.10" % "2.3.1"
libraryDependencies += "org.elasticsearch" % "elasticsearch-mapper-attachments" % "2.3.1"
libraryDependencies += "com.typesafe" % "config" % "1.2.1"
libraryDependencies += "com.typesafe.akka" % "akka-actor_2.10" % "2.3.1"

这是我的代码plugins.sbt

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.13.0")
addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.0.0-M4") 
addSbtPlugin("com.typesafe.sbt" % "sbt-multi-jvm" % "0.3.9")
addSbtPlugin("org.scalastyle" %% "scalastyle-sbt-plugin" % "0.8.0")

在终端，我写的是sbt clean编译测试更新包 ，一切正常。 但是当我点击API时总会出现错误。

Answer 1

好像你有一些错误的番石榴版本，就像你提到的第一个链接 ，可能是这个 sbt插件，你可以看到依赖树，并找出一些混乱的依赖。

Answer 2

问题是Elasticsearch的TCP客户端，因为5.0使用的是Netty 4.1，它与使用Netty 4的Spray不兼容。除了等待Spray升级或切换到elasticsearch HTTP客户端之外，没有其他解决方法。