jar文件是用sbt构建的吗？

Question

我必须建立一个jar从我scala使用的代码sbt:

sudo sbt package

它使用了我的构建文件:

name := "PSG CCD"
version := "1.0"
scalaVersion := "2.11.8"

resolvers += "Spark Packages Repo" at "http://dl.bintray.com/spark-packages/maven"

libraryDependencies ++= Seq(
        "org.apache.spark" %% "spark-core" % "2.2.0",
        "org.apache.spark" %% "spark-sql" % "2.2.0",
        "org.apache.spark" %% "spark-streaming" % "2.2.0",
        "neo4j-contrib" % "neo4j-spark-connector" % "2.0.0-M2"
)

我也建好了jar.然后,我通过FTP将其传输到我的spark服务器并执行以下操作spark-submit:

 spark-submit --class "PSGApp" --master local[4] psg_ccd.jar 

我收到此错误:

Exception in thread "main" java.lang.NoClassDefFoundError: org/neo4j/spark/Neo4j
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
    at java.lang.Class.getMethod0(Class.java:3018)
    at java.lang.Class.getMethod(Class.java:1784)
    at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:739)
    at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:180)
    at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:205)
    at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:119)
    at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Caused by: java.lang.ClassNotFoundException: org.neo4j.spark.Neo4j
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    [truncated, 10 more messages]

所以即使我neo4j-spark-connector在依赖文件中有它,但是当我运行它时似乎找不到它spark.现在,这spark是跑了不同的机器上我建立了jar从scala上.这有关系吗？是否有一个lib文件夹我需要复制并删除某处？

我猜测neo4j spark连接依赖的库信息没有内置到jar我试图运行.

也许我错过了一个强制转换的开关？

Answer 1

您需要使用sbt assembly插件来生成具有依赖项的胖jar.Stackoverflow中有很多示例.我向您展示一个:如何在IntelliJ IDEA中使用SBT构建Uber JAR(Fat JAR)？