[PARQUET-83] Hive Query failed if the data type is array<string> with parquet files

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.6.0
• Component/s: parquet-mr
• Labels: parquet serde
• Assignee: Ryan Blue
• Reporter: Sathish
• Created: 22/Aug/14 09:23
• Updated: 07/Apr/15 20:45
• Resolved: 24/Nov/14 22:24

Description

• Created a parquet file from the Avro file which have 1 array data type and rest are primitive types. Avro Schema of the array data type. Eg:

  { "name" : "action", "type" : [ { "type" : "array", "items" : "string" }, "null" ] }
  

• Created External Hive table with the Array type as below,

  create external table paraArray (action Array) partitioned by (partitionid int) row format serde 'parquet.hive.serde.ParquetHiveSerDe' stored as inputformat 'parquet.hive.MapredParquetInputFormat' outputformat 'parquet.hive.MapredParquetOutputFormat' location '/testPara'; 
  alter table paraArray add partition(partitionid=1) location '/testPara';
  

• Run the following query(select action from paraArray limit 10) and the Map reduce jobs are failing with the following exception.

  Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while processing row [Error getting row data with exception java.lang.ClassCastException: parquet.hive.writable.BinaryWritable$DicBinaryWritable cannot be cast to org.apache.hadoop.io.ArrayWritable
  at parquet.hive.serde.ParquetHiveArrayInspector.getList(ParquetHiveArrayInspector.java:125)
  at org.apache.hadoop.hive.serde2.SerDeUtils.buildJSONString(SerDeUtils.java:315)
  at org.apache.hadoop.hive.serde2.SerDeUtils.buildJSONString(SerDeUtils.java:371)
  at org.apache.hadoop.hive.serde2.SerDeUtils.getJSONString(SerDeUtils.java:236)
  at org.apache.hadoop.hive.serde2.SerDeUtils.getJSONString(SerDeUtils.java:222)
  at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:665)
  at org.apache.hadoop.hive.ql.exec.ExecMapper.map(ExecMapper.java:144)
  at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
  at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:405)
  at org.apache.hadoop.mapred.MapTask.run(MapTask.java:336)
  at org.apache.hadoop.mapred.Child$4.run(Child.java:270)
  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:1126)
  at org.apache.hadoop.mapred.Child.main(Child.java:264)
  ]
  at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:671)
  at org.apache.hadoop.hive.ql.exec.ExecMapper.map(ExecMapper.java:144)
  ... 8 more
  

This issue has long back posted on Parquet issues list and Since this is related to Parquet Hive serde, I have created the Hive issue here, The details and history of this information are as shown in the link here https://github.com/Parquet/parquet-mr/issues/281.

Issue Links

• is blocked by: HIVE-8909 Hive doesn't correctly read Parquet nested types