[TAJO-1796] Count all query for Parquet is crashed

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.10.1
• Fix Version/s: 0.11.0
• Component/s: Storage
• Assignee: Jongyoung Park
• Reporter: Jongyoung Park
• Created: 21/Aug/15 08:39
• Updated: 10/Sep/15 06:04
• Resolved: 10/Sep/15 06:04

Description

When 'select count( * )' is excuted, it fails with following error log:

2015-08-21 17:17:31,371 ERROR org.apache.tajo.engine.planner.physical.HashShuffleFileWriteExec: A group type can not be empty. Parquet does not support empty group without leaves. Empty group: table_schema
org.apache.parquet.schema.InvalidSchemaException: A group type can not be empty. Parquet does not support empty group without leaves. Empty group: table_schema
at org.apache.parquet.schema.GroupType.<init>(GroupType.java:92)
at org.apache.parquet.schema.GroupType.<init>(GroupType.java:48)
at org.apache.parquet.schema.MessageType.<init>(MessageType.java:50)
at org.apache.tajo.storage.parquet.TajoSchemaConverter.convert(TajoSchemaConverter.java:152)
at org.apache.tajo.storage.parquet.TajoReadSupport.init(TajoReadSupport.java:76)
at org.apache.parquet.hadoop.InternalParquetRecordReader.initialize(InternalParquetRecordReader.java:172)
at org.apache.parquet.hadoop.ParquetReader.initReader(ParquetReader.java:152)
at org.apache.parquet.hadoop.ParquetReader.read(ParquetReader.java:128)
at org.apache.tajo.storage.parquet.ParquetScanner.next(ParquetScanner.java:73)
...

Issue Links

• blocks: TAJO-1719 Apply filter push-down for Parquet
• relates to: TAJO-1718 Refine code for Parquet 1.8.1