如何解决java.lang.NoSuchMethodError org.apache.spark.ml.util.SchemaUtils $ .checkColumnType

Question

我想运行这里提供的CountVectorizerDemo程序：

https://github.com/apache/spark/blob/master/examples/src/main/java/org/apache/spark/examples/ml/JavaCountVectorizerExample.java

，我发现了出现以下错误并且不知道问题是什么。

Exception in thread "main" java.lang.NoSuchMethodError: org.apache.spark.ml.util.SchemaUtils$.checkColumnType$default$4()Ljava/lang/String; 
    at org.apache.spark.ml.feature.CountVectorizerParams$class.validateAndTransformSchema(CountVectorizer.scala:71) 
    at org.apache.spark.ml.feature.CountVectorizer.validateAndTransformSchema(CountVectorizer.scala:107) 
    at org.apache.spark.ml.feature.CountVectorizer.transformSchema(CountVectorizer.scala:168) 
    at org.apache.spark.ml.PipelineStage.transformSchema(Pipeline.scala:59) 
    at org.apache.spark.ml.feature.CountVectorizer.fit(CountVectorizer.scala:130) 
    at com.bah.ossem.spark.topic.CountVectorizerDemo.main(CountVectorizerDemo.java:42) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497) 
    at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:664) 
    at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:169) 
    at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:192) 
    at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:111) 
    at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala) 

Answer 1

问题是我的集群使用Spark核心1.4，但我的应用程序使用Spark核心1.5.1和MLlib 1.5.1。我将AWS群集更新为Spark 1.5.1，并解决了问题。