[KAFKA-6443] KTable involved in multiple joins could result in duplicate results - ASF JIRA

Attach files

Attach Screenshot

Add vote

Voters

Watch issue

Watchers

Create sub-task

Link

Clone

Update Comment Author

Replace String in Comment

Update Comment Visibility

Delete Comments

XML

Word

Printable

JSON

Details

Type: Bug
Status: Open
Priority: Major
Resolution: Unresolved
Affects Version/s: None
Fix Version/s: None
Component/s: streams
Labels:
None

Description

Consider the following multi table-table joins:

table1.join(table2).join(table2);    // "join" could be replaced with "leftJoin" and "outerJoin"

where table2 is involved multiple times in this multi-way joins. In this case, when a new record from the source topic of table2 is being processing, it will send to two children down in the topology and hence may resulting in duplicated join results depending on the join types.