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https://issues.apache.org/jira/browse/KAFKA-5037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16530724#comment-16530724
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Ted Yu commented on KAFKA-5037:
-------------------------------

Originally I threw exception in the if block for the following line in 
{{assign}}:
{code}
                                        if (numPartitionsCandidate == null) {
{code}
In patch v2, I construct assignment map. See if this is close to what you 
propose.

> Infinite loop if all input topics are unknown at startup
> --------------------------------------------------------
>
>                 Key: KAFKA-5037
>                 URL: https://issues.apache.org/jira/browse/KAFKA-5037
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>    Affects Versions: 0.10.2.0
>            Reporter: Matthias J. Sax
>            Priority: Major
>              Labels: newbie++, user-experience
>         Attachments: 5037.v2.txt
>
>
> See discusion: https://github.com/apache/kafka/pull/2815
> We will need some rewrite on {{StreamPartitionsAssignor}} and to add much 
> more test for all kind of corner cases, including pattern subscriptions.



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