（十三）SparkSQL 运行异常：org/codehaus/j

SparkSQL中执行了Dataset的action操作出现下面的异常：

Exception in thread "main" java.lang.NoClassDefFoundError: org/codehaus/janino/InternalCompilerException
    at org.apache.spark.sql.catalyst.expressions.codegen.GenerateSafeProjection$.create(GenerateSafeProjection.scala:197)
    at org.apache.spark.sql.catalyst.expressions.codegen.GenerateSafeProjection$.create(GenerateSafeProjection.scala:36)
    at org.apache.spark.sql.catalyst.expressions.codegen.CodeGenerator.generate(CodeGenerator.scala:1321)
    at org.apache.spark.sql.Dataset.org$apache$spark$sql$Dataset$$collectFromPlan(Dataset.scala:3272)
    at org.apache.spark.sql.Dataset$$anonfun$head$1.apply(Dataset.scala:2484)
    at org.apache.spark.sql.Dataset$$anonfun$head$1.apply(Dataset.scala:2484)
    at org.apache.spark.sql.Dataset$$anonfun$52.apply(Dataset.scala:3254)
    at org.apache.spark.sql.execution.SQLExecution$.withNewExecutionId(SQLExecution.scala:77)
    at org.apache.spark.sql.Dataset.withAction(Dataset.scala:3253)
    at org.apache.spark.sql.Dataset.head(Dataset.scala:2484)
    at org.apache.spark.sql.Dataset.take(Dataset.scala:2698)
    at org.apache.spark.sql.Dataset.showString(Dataset.scala:254)
    at org.apache.spark.sql.Dataset.show(Dataset.scala:723)
    at org.apache.spark.sql.Dataset.show(Dataset.scala:682)
    at org.apache.spark.sql.Dataset.show(Dataset.scala:691)
    at www.ruozedata.SparkSQLApp$.main(SparkSQLApp.scala:32)
    at www.ruozedata.SparkSQLApp.main(SparkSQLApp.scala)
Caused by: java.lang.ClassNotFoundException: org.codehaus.janino.InternalCompilerException
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 17 more

解决办法：在POM文件中加入依赖：

 <dependency>
      <groupId>org.codehaus.janino</groupId>
      <artifactId>janino</artifactId>
      <version>3.0.8</version>
    </dependency>