[KAFKA-9248] Foreign key join does not pickup default serdes and dies with NPE

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 2.4.0
• Component/s: streams
• Assignee: Matthias J. Sax
• Reporter: Matthias J. Sax
• Created: 28/Nov/19 23:23
• Updated: 07/Feb/20 21:18
• Resolved: 07/Feb/20 21:18

Description

The foreign key join operator only works if `Serdes` are passed in by the user via corresponding API methods.

If one tries to fall back to default Serdes from `StreamsConfig` the operator does not pick up those Serdes but dies with a NPE.

Issue Links

• is duplicated by: KAFKA-9517 KTable Joins Without Materialized Argument Yield Results That Further Joins NPE On