在配置单元中使用Javascript映射Reduce

我一直在Mongo DB中使用JavaScript编写的Map Reduce函数。现在由于大数据，我不得不转而使用Hadoop和Hive

因此，我需要使用JavaScript函数作为映射和缩减脚本来实现HiveQL

我读过很多文件，说剧本没有语言限制。供参考：-

当我尝试使用HiveQL时，甚至使用这个简单的JavaScript函数作为映射脚本

function map(data){
    return data;
}

我得到这个错误

*Error: java.lang.RuntimeException: Hive Runtime Error while closing operators
    at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.close(ExecMapper.java:232)
    at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:61)
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:429)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
    at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:162)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491)
    at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:157)
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: [Error 20003]: An error occurred when trying to close the Operator running your custom script.
    at org.apache.hadoop.hive.ql.exec.ScriptOperator.close(ScriptOperator.java:550)
    at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:610)
    at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:610)
    at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:610)
    at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.close(ExecMapper.java:205)
    ... 8 more*

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您至少可以显示MapReduce函数吗？函数map（element）{return element；}这是我尝试实现的最基本的map函数。但无法共享实际函数。