我在python中编写了一个简单的hive udf，但是当我在hive shell中运行它时，它会抛出错误：
Diagnostic Messages for this Task:
Error: java.lang.RuntimeException: Hive Runtime Error while closing operators
at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.close(ExecMapper.java:260)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:61)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:453)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
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:514)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:588)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:588)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:588)
at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.close(ExecMapper.java:227)
... 8 more
FAILED: Execution Error, return code 20003 from org.apache.hadoop.hive.ql.exec.mr.MapRedTask. An error occurred when trying to close the Operator running your custom script.
`
在hive shell中使用的命令：
add file /path/to/mycode.py;
创建了表格;
加载数据;
SELECT TRANSFORM (fname,lname) USING 'python mycode.py' AS (fname,LNAME) from table;
Hadoop版本：2.7
Hive：0.13
mycode.py
#!/usr/bin/python
import sys
import string
try:
for line in sys.stdin:
lines = string.strip(line,'\n')
fname,lname = string.split(lines,',')
#print (fname,lname)
LNAME = lname.lower()
#print LNAME
print([fname,LNAME])
except:
print sys.exc_info()
错误：
(<type 'exceptions.ValueError'>, ValueError('need more than 1 value to unpack',), <traceback object at 0x7f3441c14050>) NULL
但是，当我尝试cat pyinp.txt | python mycode.py时，它会提供所需的输出。
有人可以帮我解决这个问题吗？