AWS服务角色

Question

我试图从日食用下面的代码运行EMR集群：

RunJobFlowRequest runFlowRequest = new RunJobFlowRequest() 
      .withName("ExtractCollocations" + UUID.randomUUID()) 
      .withInstances(instances) 
      .withSteps(countStepConfig1, countStepConfig2, countStepConfig3, countStepConfig4) 
      .withLogUri("s3n://"+ Bucket_name + "/logs/") 
      .withServiceRole("EMR_DefaultRole") 
      .withJobFlowRole("EMR_EC2_DefaultRole"); 

，并得到错误：

Exception in thread "main" java.lang.NoSuchMethodError: com.amazonaws.services.elasticmapreduce.model.RunJobFlowRequest.withServiceRole(Ljava/lang/String;)Lcom/amazonaws/services/elasticmapreduce/model/RunJobFlowRequest; 
    at LocalApp.runCluster(LocalApp.java:213) 
    at LocalApp.main(LocalApp.java:52) 

如果我删除行 “withServiceRole（” EMR_DefaultRole “）”它要求服务角色

Answer 1

显然问题出在maven项目上。 Ive打开了新的AWS Java项目，它工作。