[HIVE-6043] Document incompatible changes in Hive 0.12 and trunk

• Type: Task
• Status: Open
• Priority: Blocker
• Resolution: Unresolved
• Assignee: Unassigned Assign to me
• Reporter: Brock Noland
• Created: 17/Dec/13 14:52
• Updated: 23/Jan/14 04:43

Description

We need to document incompatible changes. For example

• HIVE-5372 changed object inspector hierarchy breaking most if not all custom serdes
• HIVE-1511/HIVE-5263 serializes ObjectInspectors with Kryo so all custom serdes (fixed by HIVE-5380)
• Hive 0.12 (HIVE-4825) separates MapredWork into MapWork and ReduceWork which is used by Serdes
• HIVE-5411 serializes expressions with Kryo which are used by custom serdes
• HIVE-4827 removed the flag of "hive.optimize.mapjoin.mapreduce" (This flag was introduced in Hive 0.11 by HIVE-3952).

Issue Links

• relates to: HIVE-5380 Non-default OI constructors should be supported for backwards compatibility