我在使用配置单元转换功能时遇到错误

Question

java.lang.RuntimeException: Hive Runtime Error while closing operators at org.apache.hadoop.hive.ql.exec.ExecMapper.close(ExecMapper.java:226) at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:57) at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:436) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372) at org.apache.hadoop.mapred.Child$4.run(Child.java:255) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:396) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1136) at org.apache.hadoop.mapred.Child.main(Child.java:249) 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:486) at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:567) at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:567) at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:567) at org.apache.hadoop.hive.ql.exec.ExecMapper.close(ExecMapper.java:193) ... 8 more HQL脚本如下：

SELECT
  TRANSFORM (userid, movieid, rating)
  USING 'python /home/daxingyu930/test_data_mapper2.py'
  AS userid, movieid, rating
;

python脚本非常简单，使用\t来分割行。

我在Linux中使用以下shell脚本测试了python脚本：

cat test_data/u_data.txt | python test_data_mapper2.py

请给我一些关于这个问题的想法，它使我发疯，使我睡不着觉。 非常感谢。

Answer 1

在使用自定义脚本之前，应将脚本添加到分布式缓存中。

例如

add file  /home/daxingyu930/test_data_mapper2.py;

SELECT
    TRANSFORM (userid, movieid, rating)
    USING 'python test_data_mapper2.py'
    AS userid, movieid, rating
;

Answer 2

chmod+x test_data_mapper2.py。

然后从hiveCl1运行下面的命令 添加file/home/daxingyu930/test_data_mapper2.py

Answer 3

在USING子句中不应给出脚本的完整路径。只需使用python脚本（.py）名称。