[GOBBLIN-1257] Fix the handling of collection field types during ORC schema up-conversion in compaction

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.15.0
• Fix Version/s: 0.15.0
• Component/s: gobblin-compaction
• Assignee: Issac Buenrostro
• Reporter: Sudarshan Vasudevan
• Created: 04/Sep/20 18:42
• Updated: 07/Oct/20 18:51
• Resolved: 07/Oct/20 18:51

Description

Currently, on schema change while copying map/list entries from the original schema into the evolved schema, all the entries in the collection point to the same reference. This is inadvertently caused by re-using the same WritableComparable object for all the values.