Hive table columns can contain empty arrays.
However, on attempt to write an empty array into Parquet table, it causes exception:
Caused by: parquet.io.ParquetEncodingException: empty fields are illegal, the field should be ommited completely instead
The problem in a nutshell can be reproduced and demonstrated with CDH5.7.0 with one-liner HQL request:
CREATE TABLE array_test STORED AS PARQUET AS SELECT array();
The problem did not appear in the previous CDH (5.6.0).
The issue is very close to one reported in https://issues.apache.org/jira/browse/HIVE-11625