Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/22197
```
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Duplicate
column name c1 in the table definition.
at
org.apache.hadoop.hive.ql.metadata.Table.validateColumns(Table.java:952)
at
org.apache.hadoop.hive.ql.metadata.Table.checkValidity(Table.java:216)
at org.apache.hadoop.hive.ql.metadata.Hive.alterTable(Hive.java:495)
at org.apache.hadoop.hive.ql.metadata.Hive.alterTable(Hive.java:484)
... 88 more
```
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