[jira] [Work started] (KAFKA-4532) StateStores can be connected to the wrong source topic

["Damian Guy (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-4532?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on KAFKA-4532 started by Damian Guy.
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> StateStores can be connected to the wrong source topic
> ------------------------------------------------------
>
>                 Key: KAFKA-4532
>                 URL: https://issues.apache.org/jira/browse/KAFKA-4532
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>    Affects Versions: 0.10.1.0, 0.10.1.1, 0.10.2.0
>            Reporter: Damian Guy
>            Assignee: Damian Guy
>             Fix For: 0.10.2.0
>
>
> When building a topology with tables and StateStores, the StateStores are mapped to the source topic names. This map is retrieved via {{TopologyBuilder.stateStoreNameToSourceTopics()}} and is used in Interactive Queries to find the source topics and partitions when resolving the partitions that particular keys will be in.
> There is an issue where by this mapping for a table that is originally created with {{builder.table("topic", "table");}}, and then is subsequently used in a join, is changed to the join topic. This is because the mapping is updated during the call to {{topology.connectProcessorAndStateStores(..)}}. 
> In the case that the {{stateStoreNameToSourceTopics}} Map already has a value for the state store name it should not update the Map.



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