滚烫教程:java.lang.classnotfoundexception

2wnc66cl  于 2021-06-03  发布在  Hadoop
关注(0)|答案(1)|浏览(458)

请帮助运行烫伤教程。我在一个节点上运行hadoop 2.2,并尝试运行烫伤教程:https://github.com/cascading/scalding-tutorial/ 使用以下命令成功构建“fat jar”后:

$ git clone git://github.com/Cascading/scalding-tutorial.git
$ cd scalding-tutorial
$ sbt assembly

我尝试使用以下命令运行教程示例:

$ yarn jar target/scalding-tutorial-0.8.11.jar <TutorialPart> --local <addtional arguments>

--local和--hdfs都失败,java.lang.classnotfoundexception:

$ yarn jar target/scala-2.9.3/scalding-assembly-0.10.0.jar 1 --local
Exception in thread "main" java.lang.ClassNotFoundException: 1
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.apache.hadoop.util.RunJar.main(RunJar.java:205)

$ yarn jar target/scala-2.9.3/scalding-assembly-0.10.0.jar 1 --hdfs
Exception in thread "main" java.lang.ClassNotFoundException: 1
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.apache.hadoop.util.RunJar.main(RunJar.java:205)

更新
将命令参数更改为“tutorial1”、“tutorial0”也没有帮助:

$ yarn jar target/scala-2.9.3/scalding-assembly-0.10.0.jar Tutorial1 --local
Exception in thread "main" java.lang.ClassNotFoundException: Tutorial1
 at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
 at java.lang.Class.forName0(Native Method)
 at java.lang.Class.forName(Class.java:247)
 at org.apache.hadoop.util.RunJar.main(RunJar.java:205)

$ yarn jar target/scala-2.9.3/scalding-assembly-0.10.0.jar Tutorial0 --local
Exception in thread "main" java.lang.ClassNotFoundException: Tutorial0
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.apache.hadoop.util.RunJar.main(RunJar.java:205)
chhqkbe1

chhqkbe11#

您为主类传递了一个错误的名称,这就是它找不到它的原因。应该是的 Tutorial1 而不仅仅是 1 . 您可以在堆栈跟踪中看到错误:

Exception in thread "main" java.lang.ClassNotFoundException: 1

没有叫做 1 . 尝试:

$ yarn jar target/scala-2.9.3/scalding-assembly-0.10.0.jar Tutorial1 --local

编辑:使用以下命令对我来说效果很好:

$ yarn jar target/scalding-tutorial-0.8.11.jar Tutorial1 --local

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